Mercurial > octave
view libinterp/parse-tree/oct-parse.in.yy @ 23806:6925c8d2cd87
oct-parse.in.yy: Initialize m_classdef_object to nullptr when parser is reset.
* oct-parse.in.yy (base_parse::reset): Initialize m_classdef_object to nullptr.
author | Rik <rik@octave.org> |
---|---|
date | Fri, 28 Jul 2017 11:45:07 -0700 |
parents | 771310737137 |
children | dca84dfe167f |
line wrap: on
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/* Copyright (C) 1993-2017 John W. Eaton Copyright (C) 2009 David Grundberg Copyright (C) 2009-2010 VZLU Prague Copyright (C) 2016 Oliver Heimlich This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ // Parser for Octave. // C decarations. %{ #define YYDEBUG 1 #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cassert> #include <cstdio> #include <cstdlib> #include <iostream> #include <map> #include <sstream> #include "Matrix.h" #include "cmd-edit.h" #include "cmd-hist.h" #include "file-ops.h" #include "file-stat.h" #include "oct-env.h" #include "oct-time.h" #include "quit.h" #include "Cell.h" #include "builtin-defun-decls.h" #include "call-stack.h" #include "defaults.h" #include "defun.h" #include "dirfns.h" #include "dynamic-ld.h" #include "error.h" #include "input.h" #include "interpreter-private.h" #include "interpreter.h" #include "lex.h" #include "load-path.h" #include "oct-hist.h" #include "oct-map.h" #include "ov-classdef.h" #include "ov-fcn-handle.h" #include "ov-usr-fcn.h" #include "ov-null-mat.h" #include "pager.h" #include "parse.h" #include "pt-all.h" #include "pt-eval.h" #include "pt-funcall.h" #include "symtab.h" #include "token.h" #include "unwind-prot.h" #include "utils.h" #include "variables.h" // oct-parse.h must be included after pt-all.h #include "oct-parse.h" extern int octave_lex (YYSTYPE *, void *); // List of autoloads (function -> file mapping). static std::map<std::string, std::string> autoload_map; // Forward declarations for some functions defined at the bottom of // the file. static void yyerror (octave::base_parser& parser, const char *s); #define lexer parser.m_lexer #define scanner lexer.scanner #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC) // Disable this warning for code that is generated by Bison, including // grammar rules. Push the current state so we can restore the warning // state prior to functions we define at the bottom of the file. #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wold-style-cast" #endif %} // Bison declarations. // The grammar currently has 9 shift/reduce conflicts. Ensure that // we notice if that number changes. %expect 9 %API_PREFIX_DECL% // We are using the pure parser interface and the reentrant lexer // interface but the Octave parser and lexer are NOT properly // reentrant because both still use many global variables. It should be // safe to create a parser object and call it while another parser // object is active (to parse a callback function while the main // interactive parser is waiting for input, for example) if you take // care to properly save and restore (typically with an unwind_protect // object) relevant global values before and after the nested call. %define api.pure %PUSH_PULL_DECL% %parse-param { octave::base_parser& parser } %lex-param { void *lexer.scanner } %union { int dummy_type; // The type of the basic tokens returned by the lexer. octave::token *tok_val; // Comment strings that we need to deal with mid-rule. octave::comment_list *comment_type; // Types for the nonterminals we generate. char punct_type; octave::tree *tree_type; octave::tree_matrix *tree_matrix_type; octave::tree_cell *tree_cell_type; octave::tree_expression *tree_expression_type; octave::tree_constant *tree_constant_type; octave::tree_fcn_handle *tree_fcn_handle_type; octave::tree_funcall *tree_funcall_type; octave::tree_function_def *tree_function_def_type; octave::tree_anon_fcn_handle *tree_anon_fcn_handle_type; octave::tree_identifier *tree_identifier_type; octave::tree_index_expression *tree_index_expression_type; octave::tree_colon_expression *tree_colon_expression_type; octave::tree_argument_list *tree_argument_list_type; octave::tree_parameter_list *tree_parameter_list_type; octave::tree_command *tree_command_type; octave::tree_if_command *tree_if_command_type; octave::tree_if_clause *tree_if_clause_type; octave::tree_if_command_list *tree_if_command_list_type; octave::tree_switch_command *tree_switch_command_type; octave::tree_switch_case *tree_switch_case_type; octave::tree_switch_case_list *tree_switch_case_list_type; octave::tree_decl_elt *tree_decl_elt_type; octave::tree_decl_init_list *tree_decl_init_list_type; octave::tree_decl_command *tree_decl_command_type; octave::tree_statement *tree_statement_type; octave::tree_statement_list *tree_statement_list_type; octave_user_function *octave_user_function_type; octave::tree_classdef *tree_classdef_type; octave::tree_classdef_attribute* tree_classdef_attribute_type; octave::tree_classdef_attribute_list* tree_classdef_attribute_list_type; octave::tree_classdef_superclass* tree_classdef_superclass_type; octave::tree_classdef_superclass_list* tree_classdef_superclass_list_type; octave::tree_classdef_body* tree_classdef_body_type; octave::tree_classdef_property* tree_classdef_property_type; octave::tree_classdef_property_list* tree_classdef_property_list_type; octave::tree_classdef_properties_block* tree_classdef_properties_block_type; octave::tree_classdef_methods_list* tree_classdef_methods_list_type; octave::tree_classdef_methods_block* tree_classdef_methods_block_type; octave::tree_classdef_event* tree_classdef_event_type; octave::tree_classdef_events_list* tree_classdef_events_list_type; octave::tree_classdef_events_block* tree_classdef_events_block_type; octave::tree_classdef_enum* tree_classdef_enum_type; octave::tree_classdef_enum_list* tree_classdef_enum_list_type; octave::tree_classdef_enum_block* tree_classdef_enum_block_type; } // Tokens with line and column information. %token <tok_val> '=' ':' '-' '+' '*' '/' %token <tok_val> ADD_EQ SUB_EQ MUL_EQ DIV_EQ LEFTDIV_EQ POW_EQ %token <tok_val> EMUL_EQ EDIV_EQ ELEFTDIV_EQ EPOW_EQ AND_EQ OR_EQ %token <tok_val> EXPR_AND_AND EXPR_OR_OR %token <tok_val> EXPR_AND EXPR_OR EXPR_NOT %token <tok_val> EXPR_LT EXPR_LE EXPR_EQ EXPR_NE EXPR_GE EXPR_GT %token <tok_val> LEFTDIV EMUL EDIV ELEFTDIV EPLUS EMINUS %token <tok_val> HERMITIAN TRANSPOSE %token <tok_val> PLUS_PLUS MINUS_MINUS POW EPOW %token <tok_val> NUM IMAG_NUM %token <tok_val> STRUCT_ELT %token <tok_val> NAME %token <tok_val> END %token <tok_val> DQ_STRING SQ_STRING %token <tok_val> FOR PARFOR WHILE DO UNTIL %token <tok_val> IF ELSEIF ELSE %token <tok_val> SWITCH CASE OTHERWISE %token <tok_val> BREAK CONTINUE FUNC_RET %token <tok_val> UNWIND CLEANUP %token <tok_val> TRY CATCH %token <tok_val> GLOBAL PERSISTENT %token <tok_val> FCN_HANDLE %token <tok_val> CLASSDEF %token <tok_val> PROPERTIES METHODS EVENTS ENUMERATION %token <tok_val> METAQUERY %token <tok_val> SUPERCLASSREF %token <tok_val> FQ_IDENT %token <tok_val> GET SET %token <tok_val> FCN %token <tok_val> LEXICAL_ERROR // Other tokens. %token<dummy_type> END_OF_INPUT %token<dummy_type> INPUT_FILE // %token VARARGIN VARARGOUT %token<dummy_type> '(' ')' '[' ']' '{' '}' '.' ',' ';' '@' '\n' // Nonterminals we construct. %type <dummy_type> indirect_ref_op decl_param_init push_fcn_symtab %type <dummy_type> param_list_beg param_list_end stmt_begin parse_error %type <dummy_type> parsing_local_fcns %type <comment_type> stash_comment %type <tok_val> function_beg classdef_beg %type <punct_type> sep_no_nl opt_sep_no_nl nl opt_nl sep opt_sep %type <tree_type> input %type <tree_constant_type> string constant magic_colon %type <tree_anon_fcn_handle_type> anon_fcn_handle %type <tree_fcn_handle_type> fcn_handle %type <tree_matrix_type> matrix_rows %type <tree_cell_type> cell_rows %type <tree_expression_type> matrix cell %type <tree_expression_type> primary_expr oper_expr power_expr expr_no_assign %type <tree_expression_type> simple_expr colon_expr assign_expr expression %type <tree_identifier_type> identifier fcn_name magic_tilde %type <tree_funcall_type> superclass_identifier meta_identifier %type <tree_index_expression_type> word_list_cmd %type <tree_argument_list_type> arg_list word_list assign_lhs %type <tree_argument_list_type> cell_or_matrix_row %type <tree_parameter_list_type> opt_param_list param_list %type <tree_parameter_list_type> param_list1 param_list2 %type <tree_parameter_list_type> return_list return_list1 %type <tree_command_type> command select_command loop_command %type <tree_command_type> jump_command except_command %type <tree_function_def_type> function %type <tree_classdef_type> classdef %type <tree_command_type> file %type <tree_if_command_type> if_command %type <tree_if_clause_type> elseif_clause else_clause %type <tree_if_command_list_type> if_cmd_list1 if_cmd_list %type <tree_switch_command_type> switch_command %type <tree_switch_case_type> switch_case default_case %type <tree_switch_case_list_type> case_list1 case_list %type <tree_decl_elt_type> decl2 param_list_elt %type <tree_decl_init_list_type> decl1 %type <tree_decl_command_type> declaration %type <tree_statement_type> statement function_end %type <tree_statement_list_type> simple_list simple_list1 list list1 %type <tree_statement_list_type> opt_list %type <tree_statement_list_type> opt_fcn_list fcn_list fcn_list1 %type <tree_classdef_attribute_type> attr %type <tree_classdef_attribute_list_type> attr_list opt_attr_list %type <tree_classdef_superclass_type> superclass %type <tree_classdef_superclass_list_type> superclass_list opt_superclass_list %type <tree_classdef_body_type> class_body %type <tree_classdef_property_type> class_property %type <tree_classdef_property_list_type> property_list %type <tree_classdef_properties_block_type> properties_block %type <tree_classdef_methods_list_type> methods_list %type <tree_classdef_methods_block_type> methods_block %type <tree_classdef_event_type> class_event %type <tree_classdef_events_list_type> events_list %type <tree_classdef_events_block_type> events_block %type <tree_classdef_enum_type> class_enum %type <tree_classdef_enum_list_type> enum_list %type <tree_classdef_enum_block_type> enum_block %type <tree_function_def_type> method_decl method %type <octave_user_function_type> method_decl1 // Precedence and associativity. %right '=' ADD_EQ SUB_EQ MUL_EQ DIV_EQ LEFTDIV_EQ POW_EQ EMUL_EQ EDIV_EQ ELEFTDIV_EQ EPOW_EQ OR_EQ AND_EQ %left EXPR_OR_OR %left EXPR_AND_AND %left EXPR_OR %left EXPR_AND %left EXPR_LT EXPR_LE EXPR_EQ EXPR_NE EXPR_GE EXPR_GT %left ':' %left '-' '+' EPLUS EMINUS %left '*' '/' LEFTDIV EMUL EDIV ELEFTDIV %right UNARY EXPR_NOT %left POW EPOW HERMITIAN TRANSPOSE %right PLUS_PLUS MINUS_MINUS %left '(' '.' '{' // How to clean up if there is a parse error. We handle deleting tokens // and comments seperately and separators are just characters. The // remaining items are dynamically allocated parse tree objects that // must be deleted. Use the wildcard case (<*>) to detect unhandled // cases (for example, a new semantic type is added but not handled // here). %destructor { } <tok_val> %destructor { } <punct_type> %destructor { } <comment_type> %destructor { } <> %destructor { delete $$; } <tree_type> %destructor { delete $$; } <tree_matrix_type> %destructor { delete $$; } <tree_cell_type> %destructor { delete $$; } <tree_expression_type> %destructor { delete $$; } <tree_constant_type> %destructor { delete $$; } <tree_fcn_handle_type> %destructor { delete $$; } <tree_funcall_type> %destructor { delete $$; } <tree_function_def_type> %destructor { delete $$; } <tree_anon_fcn_handle_type> %destructor { delete $$; } <tree_identifier_type> %destructor { delete $$; } <tree_index_expression_type> %destructor { delete $$; } <tree_argument_list_type> %destructor { delete $$; } <tree_parameter_list_type> %destructor { delete $$; } <tree_command_type> %destructor { delete $$; } <tree_if_command_type> %destructor { delete $$; } <tree_if_clause_type> %destructor { delete $$; } <tree_if_command_list_type> %destructor { delete $$; } <tree_switch_command_type> %destructor { delete $$; } <tree_switch_case_type> %destructor { delete $$; } <tree_switch_case_list_type> %destructor { delete $$; } <tree_decl_elt_type> %destructor { delete $$; } <tree_decl_init_list_type> %destructor { delete $$; } <tree_decl_command_type> %destructor { delete $$; } <tree_statement_type> %destructor { delete $$; } <tree_statement_list_type> %destructor { delete $$; } <octave_user_function_type> %destructor { delete $$; } <tree_classdef_type> %destructor { delete $$; } <tree_classdef_attribute_type> %destructor { delete $$; } <tree_classdef_attribute_list_type> %destructor { delete $$; } <tree_classdef_superclass_type> %destructor { delete $$; } <tree_classdef_superclass_list_type> %destructor { delete $$; } <tree_classdef_body_type> %destructor { delete $$; } <tree_classdef_property_type> %destructor { delete $$; } <tree_classdef_property_list_type> %destructor { delete $$; } <tree_classdef_properties_block_type> %destructor { delete $$; } <tree_classdef_methods_list_type> %destructor { delete $$; } <tree_classdef_methods_block_type> %destructor { delete $$; } <tree_classdef_event_type> %destructor { delete $$; } <tree_classdef_events_list_type> %destructor { delete $$; } <tree_classdef_events_block_type> %destructor { delete $$; } <tree_classdef_enum_type> %destructor { delete $$; } <tree_classdef_enum_list_type> %destructor { delete $$; } <tree_classdef_enum_block_type> // Defining a generic destructor generates a warning if destructors are // already explicitly declared for all types. // // %destructor { // warning_with_id // ("Octave:parser-destructor", // "possible memory leak in cleanup following parse error"); // } <*> // Where to start. %start input %% // ============================== // Statements and statement lists // ============================== input : simple_list '\n' { $$ = nullptr; parser.m_stmt_list = $1; YYACCEPT; } | simple_list END_OF_INPUT { $$ = nullptr; lexer.end_of_input = true; parser.m_stmt_list = $1; YYACCEPT; } | parse_error { $$ = nullptr; YYABORT; } ; simple_list : opt_sep_no_nl { YYUSE ($1); $$ = nullptr; } | simple_list1 opt_sep_no_nl { $$ = parser.set_stmt_print_flag ($1, $2, false); } ; simple_list1 : statement { $$ = parser.make_statement_list ($1); } | simple_list1 sep_no_nl statement { $$ = parser.append_statement_list ($1, $2, $3, false); } ; opt_list : // empty { $$ = new octave::tree_statement_list (); } | list { $$ = $1; } ; list : list1 opt_sep { $$ = parser.set_stmt_print_flag ($1, $2, true); } ; list1 : statement { $$ = parser.make_statement_list ($1); } | list1 sep statement { $$ = parser.append_statement_list ($1, $2, $3, true); } ; opt_fcn_list : // empty { $$ = new octave::tree_statement_list (); } | fcn_list { $$ = $1; } ; fcn_list : fcn_list1 opt_sep { YYUSE ($2); $$ = $1; } ; fcn_list1 : function { octave::tree_statement *stmt = parser.make_statement ($1); $$ = new octave::tree_statement_list (stmt); } | fcn_list1 opt_sep function { octave::tree_statement *stmt = parser.make_statement ($3); $$ = parser.append_statement_list ($1, $2, stmt, false); } ; statement : expression { $$ = parser.make_statement ($1); } | command { $$ = parser.make_statement ($1); } | word_list_cmd { $$ = parser.make_statement ($1); } ; // ================= // Word-list command // ================= // These are not really like expressions since they can't appear on // the RHS of an assignment. But they are also not like commands (IF, // WHILE, etc. word_list_cmd : identifier word_list { $$ = parser.make_index_expression ($1, $2, '('); if (! $$) { // make_index_expression deleted $1 and $2. YYABORT; } } ; word_list : string { $$ = new octave::tree_argument_list ($1); } | word_list string { $1->append ($2); $$ = $1; } ; // =========== // Expressions // =========== identifier : NAME { octave::symbol_table::symbol_record sr = $1->sym_rec (); $$ = new octave::tree_identifier (sr, $1->line (), $1->column ()); } ; superclass_identifier : SUPERCLASSREF { std::string method_nm = $1->superclass_method_name (); std::string class_nm = $1->superclass_class_name (); $$ = parser.make_superclass_ref (method_nm, class_nm); } ; meta_identifier : METAQUERY { std::string class_nm = $1->text (); $$ = parser.make_meta_class_query (class_nm); } ; string : DQ_STRING { $$ = parser.make_constant (DQ_STRING, $1); } | SQ_STRING { $$ = parser.make_constant (SQ_STRING, $1); } ; constant : NUM { $$ = parser.make_constant (NUM, $1); } | IMAG_NUM { $$ = parser.make_constant (IMAG_NUM, $1); } | string { $$ = $1; } ; matrix : '[' matrix_rows ']' { $$ = parser.finish_matrix ($2); } ; matrix_rows : cell_or_matrix_row { $$ = $1 ? new octave::tree_matrix ($1) : nullptr; } | matrix_rows ';' cell_or_matrix_row { if ($1) { if ($3) $1->append ($3); $$ = $1; } else $$ = $3 ? new octave::tree_matrix ($3) : nullptr; } ; cell : '{' cell_rows '}' { $$ = parser.finish_cell ($2); } ; cell_rows : cell_or_matrix_row { $$ = $1 ? new octave::tree_cell ($1) : nullptr; } | cell_rows ';' cell_or_matrix_row { if ($1) { if ($3) $1->append ($3); $$ = $1; } else $$ = $3 ? new octave::tree_cell ($3) : nullptr; } ; // tree_argument_list objects can't be empty or have leading or trailing // commas, but those are all allowed in matrix and cell array rows. cell_or_matrix_row : // empty { $$ = nullptr; } | ',' { $$ = nullptr; } | arg_list { $$ = $1; } | arg_list ',' { $$ = $1; } | ',' arg_list { $$ = $2; } | ',' arg_list ',' { $$ = $2; } ; fcn_handle : '@' FCN_HANDLE { $$ = parser.make_fcn_handle ($2); lexer.looking_at_function_handle--; } ; anon_fcn_handle : '@' param_list stmt_begin expr_no_assign { $$ = parser.make_anon_fcn_handle ($2, $4); lexer.nesting_level.remove (); } ; primary_expr : identifier { $$ = $1; } | constant { $$ = $1; } | fcn_handle { $$ = $1; } | matrix { lexer.looking_at_matrix_or_assign_lhs = false; $$ = $1; } | cell { $$ = $1; } | meta_identifier { $$ = $1; } | superclass_identifier { $$ = $1; } | '(' expression ')' { $$ = $2->mark_in_parens (); } ; magic_colon : ':' { YYUSE ($1); octave_value tmp (octave_value::magic_colon_t); $$ = new octave::tree_constant (tmp); } ; magic_tilde : EXPR_NOT { YYUSE ($1); $$ = new octave::tree_black_hole (); } ; arg_list : expression { $$ = new octave::tree_argument_list ($1); } | magic_colon { $$ = new octave::tree_argument_list ($1); } | magic_tilde { $$ = new octave::tree_argument_list ($1); } | arg_list ',' magic_colon { $1->append ($3); $$ = $1; } | arg_list ',' magic_tilde { $1->append ($3); $$ = $1; } | arg_list ',' expression { $1->append ($3); $$ = $1; } ; indirect_ref_op : '.' { $$ = 0; lexer.looking_at_indirect_ref = true; } ; oper_expr : primary_expr { $$ = $1; } | oper_expr PLUS_PLUS { $$ = parser.make_postfix_op (PLUS_PLUS, $1, $2); } | oper_expr MINUS_MINUS { $$ = parser.make_postfix_op (MINUS_MINUS, $1, $2); } | oper_expr '(' ')' { $$ = parser.make_index_expression ($1, nullptr, '('); if (! $$) { // make_index_expression deleted $1. YYABORT; } } | oper_expr '(' arg_list ')' { $$ = parser.make_index_expression ($1, $3, '('); if (! $$) { // make_index_expression deleted $1 and $3. YYABORT; } } | oper_expr '{' '}' { $$ = parser.make_index_expression ($1, nullptr, '{'); if (! $$) { // make_index_expression deleted $1. YYABORT; } } | oper_expr '{' arg_list '}' { $$ = parser.make_index_expression ($1, $3, '{'); if (! $$) { // make_index_expression deleted $1 and $3. YYABORT; } } | oper_expr HERMITIAN { $$ = parser.make_postfix_op (HERMITIAN, $1, $2); } | oper_expr TRANSPOSE { $$ = parser.make_postfix_op (TRANSPOSE, $1, $2); } | oper_expr indirect_ref_op STRUCT_ELT { $$ = parser.make_indirect_ref ($1, $3->text ()); } | oper_expr indirect_ref_op '(' expression ')' { $$ = parser.make_indirect_ref ($1, $4); } | PLUS_PLUS oper_expr %prec UNARY { $$ = parser.make_prefix_op (PLUS_PLUS, $2, $1); } | MINUS_MINUS oper_expr %prec UNARY { $$ = parser.make_prefix_op (MINUS_MINUS, $2, $1); } | EXPR_NOT oper_expr %prec UNARY { $$ = parser.make_prefix_op (EXPR_NOT, $2, $1); } | '+' oper_expr %prec UNARY { $$ = parser.make_prefix_op ('+', $2, $1); } | '-' oper_expr %prec UNARY { $$ = parser.make_prefix_op ('-', $2, $1); } | oper_expr POW power_expr { $$ = parser.make_binary_op (POW, $1, $2, $3); } | oper_expr EPOW power_expr { $$ = parser.make_binary_op (EPOW, $1, $2, $3); } | oper_expr '+' oper_expr { $$ = parser.make_binary_op ('+', $1, $2, $3); } | oper_expr '-' oper_expr { $$ = parser.make_binary_op ('-', $1, $2, $3); } | oper_expr '*' oper_expr { $$ = parser.make_binary_op ('*', $1, $2, $3); } | oper_expr '/' oper_expr { $$ = parser.make_binary_op ('/', $1, $2, $3); } | oper_expr EPLUS oper_expr { $$ = parser.make_binary_op ('+', $1, $2, $3); } | oper_expr EMINUS oper_expr { $$ = parser.make_binary_op ('-', $1, $2, $3); } | oper_expr EMUL oper_expr { $$ = parser.make_binary_op (EMUL, $1, $2, $3); } | oper_expr EDIV oper_expr { $$ = parser.make_binary_op (EDIV, $1, $2, $3); } | oper_expr LEFTDIV oper_expr { $$ = parser.make_binary_op (LEFTDIV, $1, $2, $3); } | oper_expr ELEFTDIV oper_expr { $$ = parser.make_binary_op (ELEFTDIV, $1, $2, $3); } ; power_expr : primary_expr { $$ = $1; } | power_expr PLUS_PLUS { $$ = parser.make_postfix_op (PLUS_PLUS, $1, $2); } | power_expr MINUS_MINUS { $$ = parser.make_postfix_op (MINUS_MINUS, $1, $2); } | power_expr '(' ')' { $$ = parser.make_index_expression ($1, nullptr, '('); if (! $$) { // make_index_expression deleted $1. YYABORT; } } | power_expr '(' arg_list ')' { $$ = parser.make_index_expression ($1, $3, '('); if (! $$) { // make_index_expression deleted $1 and $3. YYABORT; } } | power_expr '{' '}' { $$ = parser.make_index_expression ($1, nullptr, '{'); if (! $$) { // make_index_expression deleted $1. YYABORT; } } | power_expr '{' arg_list '}' { $$ = parser.make_index_expression ($1, $3, '{'); if (! $$) { // make_index_expression deleted $1 and $3. YYABORT; } } | power_expr indirect_ref_op STRUCT_ELT { $$ = parser.make_indirect_ref ($1, $3->text ()); } | power_expr indirect_ref_op '(' expression ')' { $$ = parser.make_indirect_ref ($1, $4); } | PLUS_PLUS power_expr %prec POW { $$ = parser.make_prefix_op (PLUS_PLUS, $2, $1); } | MINUS_MINUS power_expr %prec POW { $$ = parser.make_prefix_op (MINUS_MINUS, $2, $1); } | EXPR_NOT power_expr %prec POW { $$ = parser.make_prefix_op (EXPR_NOT, $2, $1); } | '+' power_expr %prec POW { $$ = parser.make_prefix_op ('+', $2, $1); } | '-' power_expr %prec POW { $$ = parser.make_prefix_op ('-', $2, $1); } ; colon_expr : oper_expr ':' oper_expr { YYUSE ($2); $$ = parser.make_colon_expression ($1, $3); if (! $$) { // finish_colon_expression deleted $1 and $3. YYABORT; } } | oper_expr ':' oper_expr ':' oper_expr { YYUSE ($2); YYUSE ($4); $$ = parser.make_colon_expression ($1, $5, $3); if (! $$) { // finish_colon_expression deleted $1, $3, and $5. YYABORT; } } ; simple_expr : oper_expr { $$ = $1; } | colon_expr { $$ = $1; } | simple_expr EXPR_LT simple_expr { $$ = parser.make_binary_op (EXPR_LT, $1, $2, $3); } | simple_expr EXPR_LE simple_expr { $$ = parser.make_binary_op (EXPR_LE, $1, $2, $3); } | simple_expr EXPR_EQ simple_expr { $$ = parser.make_binary_op (EXPR_EQ, $1, $2, $3); } | simple_expr EXPR_GE simple_expr { $$ = parser.make_binary_op (EXPR_GE, $1, $2, $3); } | simple_expr EXPR_GT simple_expr { $$ = parser.make_binary_op (EXPR_GT, $1, $2, $3); } | simple_expr EXPR_NE simple_expr { $$ = parser.make_binary_op (EXPR_NE, $1, $2, $3); } | simple_expr EXPR_AND simple_expr { $$ = parser.make_binary_op (EXPR_AND, $1, $2, $3); } | simple_expr EXPR_OR simple_expr { $$ = parser.make_binary_op (EXPR_OR, $1, $2, $3); } | simple_expr EXPR_AND_AND simple_expr { $$ = parser.make_boolean_op (EXPR_AND_AND, $1, $2, $3); } | simple_expr EXPR_OR_OR simple_expr { $$ = parser.make_boolean_op (EXPR_OR_OR, $1, $2, $3); } ; assign_lhs : simple_expr { $$ = parser.validate_matrix_for_assignment ($1); if ($$) { lexer.looking_at_matrix_or_assign_lhs = false; } else { // validate_matrix_for_assignment deleted $1. YYABORT; } } ; assign_expr : assign_lhs '=' expression { $$ = parser.make_assign_op ('=', $1, $2, $3); } | assign_lhs ADD_EQ expression { $$ = parser.make_assign_op (ADD_EQ, $1, $2, $3); } | assign_lhs SUB_EQ expression { $$ = parser.make_assign_op (SUB_EQ, $1, $2, $3); } | assign_lhs MUL_EQ expression { $$ = parser.make_assign_op (MUL_EQ, $1, $2, $3); } | assign_lhs DIV_EQ expression { $$ = parser.make_assign_op (DIV_EQ, $1, $2, $3); } | assign_lhs LEFTDIV_EQ expression { $$ = parser.make_assign_op (LEFTDIV_EQ, $1, $2, $3); } | assign_lhs POW_EQ expression { $$ = parser.make_assign_op (POW_EQ, $1, $2, $3); } | assign_lhs EMUL_EQ expression { $$ = parser.make_assign_op (EMUL_EQ, $1, $2, $3); } | assign_lhs EDIV_EQ expression { $$ = parser.make_assign_op (EDIV_EQ, $1, $2, $3); } | assign_lhs ELEFTDIV_EQ expression { $$ = parser.make_assign_op (ELEFTDIV_EQ, $1, $2, $3); } | assign_lhs EPOW_EQ expression { $$ = parser.make_assign_op (EPOW_EQ, $1, $2, $3); } | assign_lhs AND_EQ expression { $$ = parser.make_assign_op (AND_EQ, $1, $2, $3); } | assign_lhs OR_EQ expression { $$ = parser.make_assign_op (OR_EQ, $1, $2, $3); } ; expr_no_assign : simple_expr { if ($1 && ($1->is_matrix () || $1->iscell ())) { if (parser.validate_array_list ($1)) $$ = $1; else { delete $1; YYABORT; } } else $$ = $1; } | anon_fcn_handle { $$ = $1; } ; expression : expr_no_assign { $$ = $1; } | assign_expr { if (! $1) YYABORT; $$ = $1; } // ================================================ // Commands, declarations, and function definitions // ================================================ command : declaration { $$ = $1; } | select_command { $$ = $1; } | loop_command { $$ = $1; } | jump_command { $$ = $1; } | except_command { $$ = $1; } | function { $$ = $1; } | file { $$ = $1; } ; // ===================== // Declaration statemnts // ===================== declaration : GLOBAL decl1 { $$ = parser.make_decl_command (GLOBAL, $1, $2); lexer.looking_at_decl_list = false; } | PERSISTENT decl1 { $$ = parser.make_decl_command (PERSISTENT, $1, $2); lexer.looking_at_decl_list = false; } ; decl1 : decl2 { $$ = new octave::tree_decl_init_list ($1); } | decl1 decl2 { $1->append ($2); $$ = $1; } ; decl_param_init : // empty { $$ = 0; lexer.looking_at_initializer_expression = true; } decl2 : identifier { $$ = new octave::tree_decl_elt ($1); } | identifier '=' decl_param_init expression { YYUSE ($2); lexer.looking_at_initializer_expression = false; $$ = new octave::tree_decl_elt ($1, $4); } ; // ==================== // Selection statements // ==================== select_command : if_command { $$ = $1; } | switch_command { $$ = $1; } ; // ============ // If statement // ============ if_command : IF stash_comment if_cmd_list END { if (! ($$ = parser.finish_if_command ($1, $3, $4, $2))) { // finish_if_command deleted $3. YYABORT; } } ; if_cmd_list : if_cmd_list1 { $$ = $1; } | if_cmd_list1 else_clause { $1->append ($2); $$ = $1; } ; if_cmd_list1 : expression stmt_begin opt_sep opt_list { YYUSE ($3); $1->mark_braindead_shortcircuit (); $$ = parser.start_if_command ($1, $4); } | if_cmd_list1 elseif_clause { $1->append ($2); $$ = $1; } ; elseif_clause : ELSEIF stash_comment opt_sep expression stmt_begin opt_sep opt_list { YYUSE ($3); YYUSE ($6); $4->mark_braindead_shortcircuit (); $$ = parser.make_elseif_clause ($1, $4, $7, $2); } ; else_clause : ELSE stash_comment opt_sep opt_list { YYUSE ($1); YYUSE ($3); $$ = new octave::tree_if_clause ($4, $2); } ; // ================ // Switch statement // ================ switch_command : SWITCH stash_comment expression opt_sep case_list END { YYUSE ($4); if (! ($$ = parser.finish_switch_command ($1, $3, $5, $6, $2))) { // finish_switch_command deleted $3 adn $5. YYABORT; } } ; case_list : // empty { $$ = new octave::tree_switch_case_list (); } | default_case { $$ = new octave::tree_switch_case_list ($1); } | case_list1 { $$ = $1; } | case_list1 default_case { $1->append ($2); $$ = $1; } ; case_list1 : switch_case { $$ = new octave::tree_switch_case_list ($1); } | case_list1 switch_case { $1->append ($2); $$ = $1; } ; switch_case : CASE stash_comment opt_sep expression stmt_begin opt_sep opt_list { YYUSE ($3); YYUSE ($6); $$ = parser.make_switch_case ($1, $4, $7, $2); } ; default_case : OTHERWISE stash_comment opt_sep opt_list { YYUSE ($1); YYUSE ($3); $$ = new octave::tree_switch_case ($4, $2); } ; // ======= // Looping // ======= loop_command : WHILE stash_comment expression stmt_begin opt_sep opt_list END { YYUSE ($5); $3->mark_braindead_shortcircuit (); if (! ($$ = parser.make_while_command ($1, $3, $6, $7, $2))) { // make_while_command deleted $3 and $6. YYABORT; } } | DO stash_comment opt_sep opt_list UNTIL expression { YYUSE ($1); YYUSE ($3); $$ = parser.make_do_until_command ($5, $4, $6, $2); } | FOR stash_comment assign_lhs '=' expression stmt_begin opt_sep opt_list END { YYUSE ($4); YYUSE ($7); if (! ($$ = parser.make_for_command (FOR, $1, $3, $5, nullptr, $8, $9, $2))) { // make_for_command deleted $3, $5, and $8. YYABORT; } } | FOR stash_comment '(' assign_lhs '=' expression ')' opt_sep opt_list END { YYUSE ($5); YYUSE ($8); if (! ($$ = parser.make_for_command (FOR, $1, $4, $6, nullptr, $9, $10, $2))) { // make_for_command deleted $4, $6, and $9. YYABORT; } } | PARFOR stash_comment assign_lhs '=' expression stmt_begin opt_sep opt_list END { YYUSE ($4); YYUSE ($7); if (! ($$ = parser.make_for_command (PARFOR, $1, $3, $5, nullptr, $8, $9, $2))) { // make_for_command deleted $3, $5, and $8. YYABORT; } } | PARFOR stash_comment '(' assign_lhs '=' expression ',' expression ')' opt_sep opt_list END { YYUSE ($5); YYUSE ($10); if (! ($$ = parser.make_for_command (PARFOR, $1, $4, $6, $8, $11, $12, $2))) { // make_for_command deleted $4, $6, $8, and $11. YYABORT; } } ; // ======= // Jumping // ======= jump_command : BREAK { if (! ($$ = parser.make_break_command ($1))) YYABORT; } | CONTINUE { $$ = parser.make_continue_command ($1); } | FUNC_RET { $$ = parser.make_return_command ($1); } ; // ========== // Exceptions // ========== except_command : UNWIND stash_comment opt_sep opt_list CLEANUP stash_comment opt_sep opt_list END { YYUSE ($3); YYUSE ($5); YYUSE ($7); if (! ($$ = parser.make_unwind_command ($1, $4, $8, $9, $2, $6))) { // make_unwind_command deleted $4 and $8. YYABORT; } } | TRY stash_comment opt_sep opt_list CATCH stash_comment opt_sep opt_list END { YYUSE ($3); YYUSE ($5); YYUSE ($7); if (! ($$ = parser.make_try_command ($1, $4, $7, $8, $9, $2, $6))) { // make_try_command deleted $4 and $8. YYABORT; } } | TRY stash_comment opt_sep opt_list END { YYUSE ($3); if (! ($$ = parser.make_try_command ($1, $4, 0, nullptr, $5, $2, nullptr))) { // make_try_command deleted $4. YYABORT; } } ; // =========================================== // Some 'subroutines' for function definitions // =========================================== push_fcn_symtab : // empty { $$ = 0; parser.m_curr_fcn_depth++; if (parser.m_max_fcn_depth < parser.m_curr_fcn_depth) parser.m_max_fcn_depth = parser.m_curr_fcn_depth; lexer.symtab_context.push (new octave::symbol_table::scope ()); parser.m_function_scopes.push (lexer.symtab_context.curr_scope ()); if (! lexer.reading_script_file && parser.m_curr_fcn_depth == 1 && ! parser.m_parsing_subfunctions) parser.m_primary_fcn_scope = lexer.symtab_context.curr_scope (); if (lexer.reading_script_file && parser.m_curr_fcn_depth > 1) { parser.bison_error ("nested functions not implemented in this context"); YYABORT; } } ; // =========================== // List of function parameters // =========================== param_list_beg : '(' { $$ = 0; lexer.looking_at_parameter_list = true; if (lexer.looking_at_function_handle) { lexer.symtab_context.push (new octave::symbol_table::scope ()); lexer.looking_at_function_handle--; lexer.looking_at_anon_fcn_args = true; } } ; param_list_end : ')' { $$ = 0; lexer.looking_at_parameter_list = false; lexer.looking_for_object_index = false; } ; opt_param_list : // empty { $$ = nullptr; } | param_list { $$ = $1; } ; param_list : param_list_beg param_list1 param_list_end { if ($2) lexer.mark_as_variables ($2->variable_names ()); $$ = $2; } | param_list_beg error { $$ = nullptr; parser.bison_error ("invalid parameter list"); YYABORT; } ; param_list1 : // empty { $$ = nullptr; } | param_list2 { $1->mark_as_formal_parameters (); if (parser.validate_param_list ($1, octave::tree_parameter_list::in)) { lexer.mark_as_variables ($1->variable_names ()); $$ = $1; } else { delete $1; YYABORT; } } ; param_list2 : param_list_elt { $$ = new octave::tree_parameter_list ($1); } | param_list2 ',' param_list_elt { $1->append ($3); $$ = $1; } ; param_list_elt : decl2 { $$ = $1; } | magic_tilde { $$ = new octave::tree_decl_elt ($1); } ; // =================================== // List of function return value names // =================================== return_list : '[' ']' { lexer.looking_at_return_list = false; $$ = new octave::tree_parameter_list (); } | identifier { lexer.looking_at_return_list = false; octave::tree_parameter_list *tmp = new octave::tree_parameter_list ($1); // Even though this parameter list can contain only // a single identifier, we still need to validate it // to check for varargin or varargout. if (parser.validate_param_list (tmp, octave::tree_parameter_list::out)) $$ = tmp; else { delete tmp; YYABORT; } } | '[' return_list1 ']' { lexer.looking_at_return_list = false; // Check for duplicate parameter names, varargin, // or varargout. if (parser.validate_param_list ($2, octave::tree_parameter_list::out)) $$ = $2; else { delete $2; YYABORT; } } ; return_list1 : identifier { $$ = new octave::tree_parameter_list (new octave::tree_decl_elt ($1)); } | return_list1 ',' identifier { $1->append (new octave::tree_decl_elt ($3)); $$ = $1; } ; // ======================= // Script or function file // ======================= parsing_local_fcns : // empty { parser.m_parsing_local_functions = true; } ; file : INPUT_FILE opt_nl opt_list END_OF_INPUT { YYUSE ($2); if (lexer.reading_fcn_file) { // Delete the dummy statement_list we created // after parsing the function. Any function // definitions found in the file have already // been stored in the symbol table or in // base_parser::m_primary_fcn_ptr. delete $3; } else { octave::tree_statement *end_of_script = parser.make_end ("endscript", true, lexer.input_line_number, lexer.current_input_column); parser.make_script ($3, end_of_script); } $$ = nullptr; } | INPUT_FILE opt_nl classdef parsing_local_fcns opt_sep opt_fcn_list END_OF_INPUT { YYUSE ($2); YYUSE ($5); YYUSE ($6); if (lexer.reading_classdef_file) parser.m_classdef_object = $3; $$ = nullptr; } ; // =================== // Function definition // =================== function_beg : push_fcn_symtab FCN { $$ = $2; if (lexer.reading_classdef_file || lexer.parsing_classdef) lexer.maybe_classdef_get_set_method = true; } ; fcn_name : identifier { std::string id = $1->name (); if (! parser.m_function_scopes.name_current_scope (id)) { parser.bison_error ("duplicate subfunction or nested function name", $1->line (), $1->column ()); delete $1; YYABORT; } octave::symbol_table::scope *curr_scope = lexer.symtab_context.curr_scope (); curr_scope->cache_name (id); lexer.parsed_function_name.top () = true; lexer.maybe_classdef_get_set_method = false; $$ = $1; } | GET '.' identifier { YYUSE ($1); lexer.parsed_function_name.top () = true; lexer.maybe_classdef_get_set_method = false; lexer.parsing_classdef_get_method = true; $$ = $3; } | SET '.' identifier { YYUSE ($1); lexer.parsed_function_name.top () = true; lexer.maybe_classdef_get_set_method = false; lexer.parsing_classdef_set_method = true; $$ = $3; } ; function_end : END { parser.m_endfunction_found = true; if (parser.end_token_ok ($1, octave::token::function_end)) $$ = parser.make_end ("endfunction", false, $1->line (), $1->column ()); else { parser.end_token_error ($1, octave::token::function_end); YYABORT; } } | END_OF_INPUT { // A lot of tests are based on the assumption that this is OK // if (lexer.reading_script_file) // { // parser.bison_error ("function body open at end of script"); // YYABORT; // } if (parser.m_endfunction_found) { parser.bison_error ("inconsistent function endings -- " "if one function is explicitly ended, " "so must all the others"); YYABORT; } if (! (lexer.reading_fcn_file || lexer.reading_script_file || lexer.input_from_eval_string ())) { parser.bison_error ("function body open at end of input"); YYABORT; } if (lexer.reading_classdef_file) { parser.bison_error ("classdef body open at end of input"); YYABORT; } $$ = parser.make_end ("endfunction", true, lexer.input_line_number, lexer.current_input_column); } ; function : function_beg stash_comment fcn_name opt_param_list opt_sep opt_list function_end { YYUSE ($5); $$ = parser.make_function ($1, nullptr, $3, $4, $6, $7, $2); } | function_beg stash_comment return_list '=' fcn_name opt_param_list opt_sep opt_list function_end { YYUSE ($4); YYUSE ($7); $$ = parser.make_function ($1, $3, $5, $6, $8, $9, $2); } ; // ======== // Classdef // ======== classdef_beg : CLASSDEF { if (! lexer.reading_classdef_file) { parser.bison_error ("classdef must appear inside a file containing only a class definition"); YYABORT; } // Create invalid parent scope. lexer.symtab_context.push (nullptr); lexer.parsing_classdef = true; $$ = $1; } ; classdef : classdef_beg stash_comment opt_attr_list identifier opt_superclass_list opt_sep class_body opt_sep END { YYUSE ($6); YYUSE ($8); lexer.parsing_classdef = false; if (! ($$ = parser.make_classdef ($1, $3, $4, $5, $7, $9, $2))) { // make_classdef deleted $3, $4, $5, and $7. YYABORT; } } | classdef_beg stash_comment opt_attr_list identifier opt_superclass_list opt_sep END { YYUSE ($6); lexer.parsing_classdef = false; if (! ($$ = parser.make_classdef ($1, $3, $4, $5, nullptr, $7, $2))) { // make_classdef deleted $3, $4, and $5. YYABORT; } } ; opt_attr_list : // empty { $$ = nullptr; } | '(' attr_list ')' { $$ = $2; } ; attr_list : attr { $$ = new octave::tree_classdef_attribute_list ($1); } | attr_list ',' attr { $1->append ($3); $$ = $1; } ; attr : identifier { $$ = new octave::tree_classdef_attribute ($1); } | identifier '=' decl_param_init expression { YYUSE ($2); lexer.looking_at_initializer_expression = false; $$ = new octave::tree_classdef_attribute ($1, $4); } | EXPR_NOT identifier { YYUSE ($1); $$ = new octave::tree_classdef_attribute ($2, false); } ; opt_superclass_list : // empty { $$ = nullptr; } | superclass_list { $$ = $1; } ; superclass_list : EXPR_LT { YYUSE ($1); lexer.enable_fq_identifier (); } superclass { $$ = new octave::tree_classdef_superclass_list ($3); } | superclass_list EXPR_AND { YYUSE ($2); lexer.enable_fq_identifier (); } superclass { $1->append ($4); $$ = $1; } ; superclass : FQ_IDENT { $$ = new octave::tree_classdef_superclass ($1->text ()); } ; class_body : properties_block { $$ = new octave::tree_classdef_body ($1); } | methods_block { $$ = new octave::tree_classdef_body ($1); } | events_block { $$ = new octave::tree_classdef_body ($1); } | enum_block { $$ = new octave::tree_classdef_body ($1); } | class_body opt_sep properties_block { YYUSE ($2); $1->append ($3); $$ = $1; } | class_body opt_sep methods_block { YYUSE ($2); $1->append ($3); $$ = $1; } | class_body opt_sep events_block { YYUSE ($2); $1->append ($3); $$ = $1; } | class_body opt_sep enum_block { YYUSE ($2); $1->append ($3); $$ = $1; } ; properties_block : PROPERTIES stash_comment opt_attr_list opt_sep property_list opt_sep END { YYUSE ($4); YYUSE ($6); if (! ($$ = parser.make_classdef_properties_block ($1, $3, $5, $7, $2))) { // make_classdef_properties_block delete $3 and $5. YYABORT; } } | PROPERTIES stash_comment opt_attr_list opt_sep END { YYUSE ($4); if (! ($$ = parser.make_classdef_properties_block ($1, $3, nullptr, $5, $2))) { // make_classdef_properties_block delete $3. YYABORT; } } ; property_list : class_property { $$ = new octave::tree_classdef_property_list ($1); } | property_list sep class_property { YYUSE ($2); $1->append ($3); $$ = $1; } ; class_property : identifier { $$ = new octave::tree_classdef_property ($1); } | identifier '=' decl_param_init expression { YYUSE ($2); lexer.looking_at_initializer_expression = false; $$ = new octave::tree_classdef_property ($1, $4); } ; methods_block : METHODS stash_comment opt_attr_list opt_sep methods_list opt_sep END { YYUSE ($4); YYUSE ($6); if (! ($$ = parser.make_classdef_methods_block ($1, $3, $5, $7, $2))) { // make_classdef_methods_block deleted $3 and $5. YYABORT; } } | METHODS stash_comment opt_attr_list opt_sep END { YYUSE ($4); if (! ($$ = parser.make_classdef_methods_block ($1, $3, nullptr, $5, $2))) { // make_classdef_methods_block deleted $3. YYABORT; } } ; ; method_decl1 : identifier { if (! ($$ = parser.start_classdef_external_method ($1, nullptr))) YYABORT; } | identifier param_list { if (! ($$ = parser.start_classdef_external_method ($1, $2))) YYABORT; } ; method_decl : stash_comment method_decl1 { $$ = parser.finish_classdef_external_method ($2, nullptr, $1); } | stash_comment return_list '=' { YYUSE ($3); lexer.defining_func++; lexer.parsed_function_name.push (false); } method_decl1 { lexer.defining_func--; lexer.parsed_function_name.pop (); $$ = parser.finish_classdef_external_method ($5, $2, $1); } ; method : method_decl { $$ = $1; } | function { $$ = $1; } ; methods_list : method { octave_value fcn; if ($1) fcn = $1->function (); delete $1; $$ = new octave::tree_classdef_methods_list (fcn); } | methods_list opt_sep method { YYUSE ($2); octave_value fcn; if ($3) fcn = $3->function (); delete $3; $1->append (fcn); $$ = $1; } ; events_block : EVENTS stash_comment opt_attr_list opt_sep events_list opt_sep END { YYUSE ($4); YYUSE ($6); if (! ($$ = parser.make_classdef_events_block ($1, $3, $5, $7, $2))) { // make_classdef_events_block deleted $3 and $5. YYABORT; } } | EVENTS stash_comment opt_attr_list opt_sep END { YYUSE ($4); if (! ($$ = parser.make_classdef_events_block ($1, $3, nullptr, $5, $2))) { // make_classdef_events_block deleted $3. YYABORT; } } ; events_list : class_event { $$ = new octave::tree_classdef_events_list ($1); } | events_list opt_sep class_event { YYUSE ($2); $1->append ($3); $$ = $1; } ; class_event : identifier { $$ = new octave::tree_classdef_event ($1); } ; enum_block : ENUMERATION stash_comment opt_attr_list opt_sep enum_list opt_sep END { YYUSE ($4); YYUSE ($6); if (! ($$ = parser.make_classdef_enum_block ($1, $3, $5, $7, $2))) { // make_classdef_enum_block deleted $3 and $5. YYABORT; } } | ENUMERATION stash_comment opt_attr_list opt_sep END { YYUSE ($4); if (! ($$ = parser.make_classdef_enum_block ($1, $3, nullptr, $5, $2))) { // make_classdef_enum_block deleted $3. YYABORT; } } ; enum_list : class_enum { $$ = new octave::tree_classdef_enum_list ($1); } | enum_list opt_sep class_enum { YYUSE ($2); $1->append ($3); $$ = $1; } ; class_enum : identifier '(' expression ')' { $$ = new octave::tree_classdef_enum ($1, $3); } ; // ============= // Miscellaneous // ============= stmt_begin : // empty { $$ = 0; lexer.at_beginning_of_statement = true; } ; stash_comment : // empty { $$ = lexer.get_comment (); } ; parse_error : LEXICAL_ERROR { $$ = 0; std::string msg = $1->text (); parser.bison_error (msg.c_str ()); } | error { $$ = 0; } ; sep_no_nl : ',' { $$ = ','; } | ';' { $$ = ';'; } | sep_no_nl ',' { $$ = $1; } | sep_no_nl ';' { $$ = $1; } ; opt_sep_no_nl : // empty { $$ = 0; } | sep_no_nl { $$ = $1; } ; opt_nl : // empty { $$ = 0; } | nl { $$ = $1; } ; nl : '\n' { $$ = '\n'; } | nl '\n' { $$ = $1; } ; sep : ',' { $$ = ','; } | ';' { $$ = ';'; } | '\n' { $$ = '\n'; } | sep ',' { $$ = $1; } | sep ';' { $$ = $1; } | sep '\n' { $$ = $1; } ; opt_sep : // empty { $$ = 0; } | sep { $$ = $1; } ; %% #if defined (HAVE_PRAGMA_GCC_DIAGNOSTIC) // Restore prevailing warning state for remainder of the file. #pragma GCC diagnostic pop #endif // Generic error messages. #undef lexer #undef scanner static void yyerror (octave::base_parser& parser, const char *s) { parser.bison_error (s); } namespace octave { size_t base_parser::parent_scope_info::size (void) const { return m_info.size (); } void base_parser::parent_scope_info::push (const value_type& elt) { m_info.push_back (elt); } void base_parser::parent_scope_info::push (symbol_table::scope *scope) { push (value_type (scope, "")); } void base_parser::parent_scope_info::pop (void) { m_info.pop_back (); } bool base_parser::parent_scope_info::name_ok (const std::string& name) { // Name can't be the same as any parent function or any other // function we've already seen. We could maintain a complex // tree structure of names, or we can just store the set of // full names of all the functions, which must be unique. std::string full_name; for (size_t i = 0; i < size()-1; i++) { const value_type& elt = m_info[i]; if (name == elt.second) return false; full_name += elt.second + ">"; } full_name += name; if (m_all_names.find (full_name) != m_all_names.end ()) return false; m_all_names.insert (full_name); return true; } bool base_parser::parent_scope_info::name_current_scope (const std::string& name) { if (! name_ok (name)) return false; if (size () > 0) m_info.back().second = name; return true; } symbol_table::scope * base_parser::parent_scope_info::parent_scope (void) const { return size () > 1 ? m_info[size()-2].first : nullptr; } std::string base_parser::parent_scope_info::parent_name (void) const { return m_info[size()-2].second; } void base_parser::parent_scope_info::clear (void) { m_info.clear (); m_all_names.clear (); } base_parser::base_parser (base_lexer& lxr) : m_endfunction_found (false), m_autoloading (false), m_fcn_file_from_relative_lookup (false), m_parsing_subfunctions (false), m_parsing_local_functions (false), m_max_fcn_depth (0), m_curr_fcn_depth (0), m_primary_fcn_scope (nullptr), m_curr_class_name (), m_curr_package_name (), m_function_scopes (), m_primary_fcn_ptr (nullptr), m_subfunction_names (), m_classdef_object (nullptr), m_stmt_list (nullptr), m_lexer (lxr), m_parser_state (yypstate_new ()) { } base_parser::~base_parser (void) { delete m_stmt_list; delete &m_lexer; // FIXME: Deleting the internal Bison parser state structure does // not clean up any partial parse trees in the event of an interrupt or // error. It's not clear how to safely do that with the C language // parser that Bison generates. The C++ language parser that Bison // generates would do it for us automatically whenever an exception // is thrown while parsing input, but there is currently no C++ // interface for a push parser. yypstate_delete (static_cast<yypstate *> (m_parser_state)); } void base_parser::reset (void) { m_endfunction_found = false; m_autoloading = false; m_fcn_file_from_relative_lookup = false; m_parsing_subfunctions = false; m_parsing_local_functions = false; m_max_fcn_depth = 0; m_curr_fcn_depth = 0; m_primary_fcn_scope = nullptr; m_curr_class_name = ""; m_curr_package_name = ""; m_function_scopes.clear (); m_primary_fcn_ptr = nullptr; m_subfunction_names.clear (); m_classdef_object = nullptr; delete m_stmt_list; m_stmt_list = nullptr; m_lexer.reset (); yypstate_delete (static_cast<yypstate *> (m_parser_state)); m_parser_state = yypstate_new (); } } // Error mesages for mismatched end tokens. static std::string end_token_as_string (octave::token::end_tok_type ettype) { std::string retval = "<unknown>"; switch (ettype) { case octave::token::simple_end: retval = "end"; break; case octave::token::classdef_end: retval = "endclassdef"; break; case octave::token::enumeration_end: retval = "endenumeration"; break; case octave::token::events_end: retval = "endevents"; break; case octave::token::for_end: retval = "endfor"; break; case octave::token::function_end: retval = "endfunction"; break; case octave::token::if_end: retval = "endif"; break; case octave::token::methods_end: retval = "endmethods"; break; case octave::token::parfor_end: retval = "endparfor"; break; case octave::token::properties_end: retval = "endproperties"; break; case octave::token::switch_end: retval = "endswitch"; break; case octave::token::try_catch_end: retval = "end_try_catch"; break; case octave::token::unwind_protect_end: retval = "end_unwind_protect"; break; case octave::token::while_end: retval = "endwhile"; break; default: panic_impossible (); break; } return retval; } namespace octave { void base_parser::end_token_error (token *tok, token::end_tok_type expected) { std::string msg = ("'" + end_token_as_string (expected) + "' command matched by '" + end_token_as_string (tok->ettype ()) + "'"); bison_error (msg, tok->line (), tok->column ()); } // Check to see that end tokens are properly matched. bool base_parser::end_token_ok (token *tok, token::end_tok_type expected) { token::end_tok_type ettype = tok->ettype (); return ettype == expected || ettype == token::simple_end; } // Maybe print a warning if an assignment expression is used as the // test in a logical expression. void base_parser::maybe_warn_assign_as_truth_value (tree_expression *expr) { if (expr->is_assignment_expression () && expr->paren_count () < 2) { if (m_lexer.fcn_file_full_name.empty ()) warning_with_id ("Octave:assign-as-truth-value", "suggest parenthesis around assignment used as truth value"); else warning_with_id ("Octave:assign-as-truth-value", "suggest parenthesis around assignment used as truth value near line %d, column %d in file '%s'", expr->line (), expr->column (), m_lexer.fcn_file_full_name.c_str ()); } } // Maybe print a warning about switch labels that aren't constants. void base_parser::maybe_warn_variable_switch_label (tree_expression *expr) { if (! expr->is_constant ()) { if (m_lexer.fcn_file_full_name.empty ()) warning_with_id ("Octave:variable-switch-label", "variable switch label"); else warning_with_id ("Octave:variable-switch-label", "variable switch label near line %d, column %d in file '%s'", expr->line (), expr->column (), m_lexer.fcn_file_full_name.c_str ()); } } // Make a constant. tree_constant * base_parser::make_constant (int op, token *tok_val) { int l = tok_val->line (); int c = tok_val->column (); tree_constant *retval = nullptr; switch (op) { case NUM: { octave_value tmp (tok_val->number ()); retval = new tree_constant (tmp, l, c); retval->stash_original_text (tok_val->text_rep ()); } break; case IMAG_NUM: { octave_value tmp (Complex (0.0, tok_val->number ())); retval = new tree_constant (tmp, l, c); retval->stash_original_text (tok_val->text_rep ()); } break; case DQ_STRING: case SQ_STRING: { std::string txt = tok_val->text (); char delim = op == DQ_STRING ? '"' : '\''; octave_value tmp (txt, delim); if (txt.empty ()) { if (op == DQ_STRING) tmp = octave_null_str::instance; else tmp = octave_null_sq_str::instance; } retval = new tree_constant (tmp, l, c); if (op == DQ_STRING) txt = undo_string_escapes (txt); // FIXME: maybe this should also be handled by // tok_val->text_rep () for character strings? retval->stash_original_text (delim + txt + delim); } break; default: panic_impossible (); break; } return retval; } // Make a function handle. tree_fcn_handle * base_parser::make_fcn_handle (token *tok_val) { int l = tok_val->line (); int c = tok_val->column (); tree_fcn_handle *retval = new tree_fcn_handle (tok_val->text (), l, c); return retval; } // Make an anonymous function handle. tree_anon_fcn_handle * base_parser::make_anon_fcn_handle (tree_parameter_list *param_list, tree_expression *expr) { // FIXME: need to get these from the location of the @ symbol. int l = m_lexer.input_line_number; int c = m_lexer.current_input_column; symbol_table::scope *fcn_scope = m_lexer.symtab_context.curr_scope (); symbol_table::scope *parent_scope = m_lexer.symtab_context.parent_scope (); m_lexer.symtab_context.pop (); expr->set_print_flag (false); tree_anon_fcn_handle *retval = new tree_anon_fcn_handle (param_list, expr, fcn_scope, parent_scope, l, c); // FIXME: Stash the filename. This does not work and produces // errors when executed. //retval->stash_file_name (m_lexer.fcn_file_name); return retval; } // Build a colon expression. tree_expression * base_parser::make_colon_expression (tree_expression *base, tree_expression *limit, tree_expression *incr) { tree_expression *retval = nullptr; unwind_protect frame; frame.protect_var (discard_error_messages); frame.protect_var (discard_warning_messages); discard_error_messages = true; discard_warning_messages = true; if (! base || ! limit) { delete base; delete limit; delete incr; return retval; } int l = base->line (); int c = base->column (); tree_colon_expression *e = new tree_colon_expression (base, limit, incr, l, c); if (base->is_constant () && limit->is_constant () && (! incr || (incr && incr->is_constant ()))) { try { tree_evaluator& tw = __get_evaluator__ ("finish_colon_expression"); octave_value tmp = tw.evaluate (e); tree_constant *tc_retval = new tree_constant (tmp, e->line (), e->column ()); std::ostringstream buf; tree_print_code tpc (buf); e->accept (tpc); tc_retval->stash_original_text (buf.str ()); delete e; retval = tc_retval; } catch (const execution_exception&) { interpreter::recover_from_exception (); } } else retval = e; return retval; } // Build a binary expression. tree_expression * base_parser::make_binary_op (int op, tree_expression *op1, token *tok_val, tree_expression *op2) { octave_value::binary_op t = octave_value::unknown_binary_op; switch (op) { case POW: t = octave_value::op_pow; break; case EPOW: t = octave_value::op_el_pow; break; case '+': t = octave_value::op_add; break; case '-': t = octave_value::op_sub; break; case '*': t = octave_value::op_mul; break; case '/': t = octave_value::op_div; break; case EMUL: t = octave_value::op_el_mul; break; case EDIV: t = octave_value::op_el_div; break; case LEFTDIV: t = octave_value::op_ldiv; break; case ELEFTDIV: t = octave_value::op_el_ldiv; break; case EXPR_LT: t = octave_value::op_lt; break; case EXPR_LE: t = octave_value::op_le; break; case EXPR_EQ: t = octave_value::op_eq; break; case EXPR_GE: t = octave_value::op_ge; break; case EXPR_GT: t = octave_value::op_gt; break; case EXPR_NE: t = octave_value::op_ne; break; case EXPR_AND: t = octave_value::op_el_and; break; case EXPR_OR: t = octave_value::op_el_or; break; default: panic_impossible (); break; } int l = tok_val->line (); int c = tok_val->column (); return maybe_compound_binary_expression (op1, op2, l, c, t); } // Build a boolean expression. tree_expression * base_parser::make_boolean_op (int op, tree_expression *op1, token *tok_val, tree_expression *op2) { tree_boolean_expression::type t; switch (op) { case EXPR_AND_AND: t = tree_boolean_expression::bool_and; break; case EXPR_OR_OR: t = tree_boolean_expression::bool_or; break; default: panic_impossible (); break; } int l = tok_val->line (); int c = tok_val->column (); return new tree_boolean_expression (op1, op2, l, c, t); } // Build a prefix expression. tree_expression * base_parser::make_prefix_op (int op, tree_expression *op1, token *tok_val) { octave_value::unary_op t = octave_value::unknown_unary_op; switch (op) { case EXPR_NOT: t = octave_value::op_not; break; case '+': t = octave_value::op_uplus; break; case '-': t = octave_value::op_uminus; break; case PLUS_PLUS: t = octave_value::op_incr; break; case MINUS_MINUS: t = octave_value::op_decr; break; default: panic_impossible (); break; } int l = tok_val->line (); int c = tok_val->column (); return new tree_prefix_expression (op1, l, c, t); } // Build a postfix expression. tree_expression * base_parser::make_postfix_op (int op, tree_expression *op1, token *tok_val) { octave_value::unary_op t = octave_value::unknown_unary_op; switch (op) { case HERMITIAN: t = octave_value::op_hermitian; break; case TRANSPOSE: t = octave_value::op_transpose; break; case PLUS_PLUS: t = octave_value::op_incr; break; case MINUS_MINUS: t = octave_value::op_decr; break; default: panic_impossible (); break; } int l = tok_val->line (); int c = tok_val->column (); return new tree_postfix_expression (op1, l, c, t); } // Build an unwind-protect command. tree_command * base_parser::make_unwind_command (token *unwind_tok, tree_statement_list *body, tree_statement_list *cleanup_stmts, token *end_tok, comment_list *lc, comment_list *mc) { tree_command *retval = nullptr; if (end_token_ok (end_tok, token::unwind_protect_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = unwind_tok->line (); int c = unwind_tok->column (); retval = new tree_unwind_protect_command (body, cleanup_stmts, lc, mc, tc, l, c); } else { delete body; delete cleanup_stmts; end_token_error (end_tok, token::unwind_protect_end); } return retval; } // Build a try-catch command. tree_command * base_parser::make_try_command (token *try_tok, tree_statement_list *body, char catch_sep, tree_statement_list *cleanup_stmts, token *end_tok, comment_list *lc, comment_list *mc) { tree_command *retval = nullptr; if (end_token_ok (end_tok, token::try_catch_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = try_tok->line (); int c = try_tok->column (); tree_identifier *id = nullptr; if (! catch_sep && cleanup_stmts && ! cleanup_stmts->empty ()) { tree_statement *stmt = cleanup_stmts->front (); if (stmt) { tree_expression *expr = stmt->expression (); if (expr && expr->is_identifier ()) { id = dynamic_cast<tree_identifier *> (expr); cleanup_stmts->pop_front (); stmt->set_expression (nullptr); delete stmt; } } } retval = new tree_try_catch_command (body, cleanup_stmts, id, lc, mc, tc, l, c); } else { delete body; delete cleanup_stmts; end_token_error (end_tok, token::try_catch_end); } return retval; } // Build a while command. tree_command * base_parser::make_while_command (token *while_tok, tree_expression *expr, tree_statement_list *body, token *end_tok, comment_list *lc) { tree_command *retval = nullptr; maybe_warn_assign_as_truth_value (expr); if (end_token_ok (end_tok, token::while_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); m_lexer.looping--; int l = while_tok->line (); int c = while_tok->column (); retval = new tree_while_command (expr, body, lc, tc, l, c); } else { delete expr; delete body; end_token_error (end_tok, token::while_end); } return retval; } // Build a do-until command. tree_command * base_parser::make_do_until_command (token *until_tok, tree_statement_list *body, tree_expression *expr, comment_list *lc) { maybe_warn_assign_as_truth_value (expr); comment_list *tc = m_lexer.comment_buf.get_comment (); m_lexer.looping--; int l = until_tok->line (); int c = until_tok->column (); return new tree_do_until_command (expr, body, lc, tc, l, c); } // Build a for command. tree_command * base_parser::make_for_command (int tok_id, token *for_tok, tree_argument_list *lhs, tree_expression *expr, tree_expression *maxproc, tree_statement_list *body, token *end_tok, comment_list *lc) { tree_command *retval = nullptr; bool parfor = tok_id == PARFOR; if (end_token_ok (end_tok, parfor ? token::parfor_end : token::for_end)) { expr->mark_as_for_cmd_expr (); comment_list *tc = m_lexer.comment_buf.get_comment (); m_lexer.looping--; int l = for_tok->line (); int c = for_tok->column (); if (lhs->length () == 1) { tree_expression *tmp = lhs->remove_front (); retval = new tree_simple_for_command (parfor, tmp, expr, maxproc, body, lc, tc, l, c); delete lhs; } else { if (parfor) { delete lhs; delete expr; delete maxproc; delete body; bison_error ("invalid syntax for parfor statement"); } else retval = new tree_complex_for_command (lhs, expr, body, lc, tc, l, c); } } else { delete lhs; delete expr; delete maxproc; delete body; end_token_error (end_tok, parfor ? token::parfor_end : token::for_end); } return retval; } // Build a break command. tree_command * base_parser::make_break_command (token *break_tok) { int l = break_tok->line (); int c = break_tok->column (); if (! m_lexer.looping) { bison_error ("break must appear in a loop in the same file as loop command"); return nullptr; } else return new tree_break_command (l, c); } // Build a continue command. tree_command * base_parser::make_continue_command (token *continue_tok) { int l = continue_tok->line (); int c = continue_tok->column (); return new tree_continue_command (l, c); } // Build a return command. tree_command * base_parser::make_return_command (token *return_tok) { int l = return_tok->line (); int c = return_tok->column (); return new tree_return_command (l, c); } // Start an if command. tree_if_command_list * base_parser::start_if_command (tree_expression *expr, tree_statement_list *list) { maybe_warn_assign_as_truth_value (expr); tree_if_clause *t = new tree_if_clause (expr, list); return new tree_if_command_list (t); } // Finish an if command. tree_if_command * base_parser::finish_if_command (token *if_tok, tree_if_command_list *list, token *end_tok, comment_list *lc) { tree_if_command *retval = nullptr; if (end_token_ok (end_tok, token::if_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = if_tok->line (); int c = if_tok->column (); if (list && ! list->empty ()) { tree_if_clause *elt = list->front (); if (elt) { elt->line (l); elt->column (c); } } retval = new tree_if_command (list, lc, tc, l, c); } else { delete list; end_token_error (end_tok, token::if_end); } return retval; } // Build an elseif clause. tree_if_clause * base_parser::make_elseif_clause (token *elseif_tok, tree_expression *expr, tree_statement_list *list, comment_list *lc) { maybe_warn_assign_as_truth_value (expr); int l = elseif_tok->line (); int c = elseif_tok->column (); return new tree_if_clause (expr, list, lc, l, c); } // Finish a switch command. tree_switch_command * base_parser::finish_switch_command (token *switch_tok, tree_expression *expr, tree_switch_case_list *list, token *end_tok, comment_list *lc) { tree_switch_command *retval = nullptr; if (end_token_ok (end_tok, token::switch_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = switch_tok->line (); int c = switch_tok->column (); if (list && ! list->empty ()) { tree_switch_case *elt = list->front (); if (elt) { elt->line (l); elt->column (c); } } retval = new tree_switch_command (expr, list, lc, tc, l, c); } else { delete expr; delete list; end_token_error (end_tok, token::switch_end); } return retval; } // Build a switch case. tree_switch_case * base_parser::make_switch_case (token *case_tok, tree_expression *expr, tree_statement_list *list, comment_list *lc) { maybe_warn_variable_switch_label (expr); int l = case_tok->line (); int c = case_tok->column (); return new tree_switch_case (expr, list, lc, l, c); } // Build an assignment to a variable. tree_expression * base_parser::make_assign_op (int op, tree_argument_list *lhs, token *eq_tok, tree_expression *rhs) { octave_value::assign_op t = octave_value::unknown_assign_op; switch (op) { case '=': t = octave_value::op_asn_eq; break; case ADD_EQ: t = octave_value::op_add_eq; break; case SUB_EQ: t = octave_value::op_sub_eq; break; case MUL_EQ: t = octave_value::op_mul_eq; break; case DIV_EQ: t = octave_value::op_div_eq; break; case LEFTDIV_EQ: t = octave_value::op_ldiv_eq; break; case POW_EQ: t = octave_value::op_pow_eq; break; case EMUL_EQ: t = octave_value::op_el_mul_eq; break; case EDIV_EQ: t = octave_value::op_el_div_eq; break; case ELEFTDIV_EQ: t = octave_value::op_el_ldiv_eq; break; case EPOW_EQ: t = octave_value::op_el_pow_eq; break; case AND_EQ: t = octave_value::op_el_and_eq; break; case OR_EQ: t = octave_value::op_el_or_eq; break; default: panic_impossible (); break; } int l = eq_tok->line (); int c = eq_tok->column (); if (! lhs->is_simple_assign_lhs () && t != octave_value::op_asn_eq) { // Multiple assignments like [x,y] OP= rhs are only valid for // '=', not '+=', etc. delete lhs; delete rhs; bison_error ("computed multiple assignment not allowed", l, c); return nullptr; } if (lhs->is_simple_assign_lhs ()) { // We are looking at a simple assignment statement like x = rhs; tree_expression *tmp = lhs->remove_front (); if ((tmp->is_identifier () || tmp->is_index_expression ()) && is_keyword (tmp->name ())) { std::string kw = tmp->name (); delete tmp; delete lhs; delete rhs; bison_error ("invalid assignment to keyword \"" + kw + "\"", l, c); return nullptr; } delete lhs; return new tree_simple_assignment (tmp, rhs, false, l, c, t); } else { std::list<std::string> names = lhs->variable_names (); for (const auto& kw : names) { if (is_keyword (kw)) { delete lhs; delete rhs; bison_error ("invalid assignment to keyword \"" + kw + "\"", l, c); return nullptr; } } return new tree_multi_assignment (lhs, rhs, false, l, c); } } // Define a script. void base_parser::make_script (tree_statement_list *cmds, tree_statement *end_script) { if (! cmds) cmds = new tree_statement_list (); cmds->append (end_script); octave_user_script *script = new octave_user_script (m_lexer.fcn_file_full_name, m_lexer.fcn_file_name, cmds, m_lexer.help_text); m_lexer.help_text = ""; sys::time now; script->stash_fcn_file_time (now); m_primary_fcn_ptr = script; } // Define a function. // FIXME: combining start_function, finish_function, and // recover_from_parsing_function should be possible, but it makes // for a large mess. Maybe this could be a bit better organized? tree_function_def * base_parser::make_function (token *fcn_tok, tree_parameter_list *ret_list, tree_identifier *id, tree_parameter_list *param_list, tree_statement_list *body, tree_statement *end_fcn_stmt, comment_list *lc) { tree_function_def *retval = nullptr; int l = fcn_tok->line (); int c = fcn_tok->column (); octave_user_function *tmp_fcn = start_function (id, param_list, body, end_fcn_stmt); retval = finish_function (ret_list, tmp_fcn, lc, l, c); recover_from_parsing_function (); return retval; } // Begin defining a function. octave_user_function * base_parser::start_function (tree_identifier *id, tree_parameter_list *param_list, tree_statement_list *body, tree_statement *end_fcn_stmt) { // We'll fill in the return list later. std::string id_name = id->name (); delete id; if (m_lexer.parsing_classdef_get_method) id_name.insert (0, "get."); else if (m_lexer.parsing_classdef_set_method) id_name.insert (0, "set."); m_lexer.parsing_classdef_get_method = false; m_lexer.parsing_classdef_set_method = false; if (! body) body = new tree_statement_list (); body->append (end_fcn_stmt); octave_user_function *fcn = new octave_user_function (m_lexer.symtab_context.curr_scope (), param_list, nullptr, body); if (fcn) { comment_list *tc = m_lexer.comment_buf.get_comment (); fcn->stash_trailing_comment (tc); fcn->stash_fcn_end_location (end_fcn_stmt->line (), end_fcn_stmt->column ()); } // If input is coming from a file, issue a warning if the name of // the file does not match the name of the function stated in the // file. Matlab doesn't provide a diagnostic (it ignores the stated // name). if (! m_autoloading && m_lexer.reading_fcn_file && m_curr_fcn_depth == 1 && ! m_parsing_subfunctions) { // FIXME: should m_lexer.fcn_file_name already be // preprocessed when we get here? It seems to only be a // problem with relative filenames. std::string nm = m_lexer.fcn_file_name; size_t pos = nm.find_last_of (sys::file_ops::dir_sep_chars ()); if (pos != std::string::npos) nm = m_lexer.fcn_file_name.substr (pos+1); if (nm != id_name) { warning_with_id ("Octave:function-name-clash", "function name '%s' does not agree with function filename '%s'", id_name.c_str (), m_lexer.fcn_file_full_name.c_str ()); id_name = nm; } } if (m_lexer.reading_fcn_file || m_lexer.reading_classdef_file || m_autoloading) { sys::time now; fcn->stash_fcn_file_name (m_lexer.fcn_file_full_name); fcn->stash_fcn_file_time (now); fcn->stash_dir_name (m_lexer.dir_name); fcn->stash_package_name (m_lexer.package_name); fcn->mark_as_system_fcn_file (); if (m_fcn_file_from_relative_lookup) fcn->mark_relative (); if (m_curr_fcn_depth > 1 || m_parsing_subfunctions) { fcn->stash_parent_fcn_name (m_lexer.fcn_file_name); if (m_curr_fcn_depth > 1) fcn->stash_parent_fcn_scope (m_function_scopes.parent_scope ()); else fcn->stash_parent_fcn_scope (m_primary_fcn_scope); } if (m_lexer.parsing_class_method) { if (m_curr_class_name == id_name) fcn->mark_as_class_constructor (); else fcn->mark_as_class_method (); fcn->stash_dispatch_class (m_curr_class_name); } std::string nm = fcn->fcn_file_name (); sys::file_stat fs (nm); if (fs && fs.is_newer (now)) warning_with_id ("Octave:future-time-stamp", "time stamp for '%s' is in the future", nm.c_str ()); } else if (! input_from_tmp_history_file && ! m_lexer.force_script && m_lexer.reading_script_file && m_lexer.fcn_file_name == id_name) { warning ("function '%s' defined within script file '%s'", id_name.c_str (), m_lexer.fcn_file_full_name.c_str ()); } fcn->stash_function_name (id_name); if (! m_lexer.help_text.empty () && m_curr_fcn_depth == 1 && ! m_parsing_subfunctions) { fcn->document (m_lexer.help_text); m_lexer.help_text = ""; } if (m_lexer.reading_fcn_file && m_curr_fcn_depth == 1 && ! m_parsing_subfunctions) m_primary_fcn_ptr = fcn; return fcn; } tree_statement * base_parser::make_end (const std::string& type, bool eof, int l, int c) { return make_statement (new tree_no_op_command (type, eof, l, c)); } tree_function_def * base_parser::finish_function (tree_parameter_list *ret_list, octave_user_function *fcn, comment_list *lc, int l, int c) { tree_function_def *retval = nullptr; if (ret_list) ret_list->mark_as_formal_parameters (); if (fcn) { std::string nm = fcn->name (); std::string file = fcn->fcn_file_name (); std::string tmp = nm; if (! file.empty ()) tmp += ": " + file; symbol_table& symtab = __get_symbol_table__ ("base_parser::finish_function"); symbol_table::scope *fcn_scope = fcn->scope (); fcn_scope->cache_name (tmp); if (lc) fcn->stash_leading_comment (lc); fcn->define_ret_list (ret_list); if (m_curr_fcn_depth > 1 || m_parsing_subfunctions) { fcn->stash_fcn_location (l, c); octave_value ov_fcn (fcn); if (m_endfunction_found && m_function_scopes.size () > 1) { symbol_table::scope *pscope = m_function_scopes.parent_scope (); pscope->install_nestfunction (nm, ov_fcn); } else { fcn->mark_as_subfunction (); m_subfunction_names.push_back (nm); m_primary_fcn_scope->install_subfunction (nm, ov_fcn); } } if (m_parsing_local_functions ) symtab.install_local_function (nm, octave_value (fcn), file); else if (m_curr_fcn_depth == 1) fcn_scope->update_nest (); if (! m_lexer.reading_fcn_file && m_curr_fcn_depth == 1) { // We are either reading a script file or defining a function // at the command line, so this definition creates a // tree_function object that is placed in the parse tree. // Otherwise, it is just inserted in the symbol table, // either as a subfunction or nested function (see above), // or as the primary function for the file, via // m_primary_fcn_ptr (see also load_fcn_from_file,, // parse_fcn_file, and // symbol_table::fcn_info::fcn_info_rep::find_user_function). if (m_lexer.buffer_function_text) { fcn->cache_function_text (m_lexer.function_text, fcn->time_parsed ()); m_lexer.buffer_function_text = false; } retval = new tree_function_def (fcn); } } return retval; } void base_parser::recover_from_parsing_function (void) { m_lexer.symtab_context.pop (); if (m_lexer.reading_fcn_file && m_curr_fcn_depth == 1 && ! m_parsing_subfunctions) m_parsing_subfunctions = true; m_curr_fcn_depth--; m_function_scopes.pop (); m_lexer.defining_func--; m_lexer.parsed_function_name.pop (); m_lexer.looking_at_return_list = false; m_lexer.looking_at_parameter_list = false; } tree_funcall * base_parser::make_superclass_ref (const std::string& method_nm, const std::string& class_nm) { octave_value_list args; args(1) = class_nm; args(0) = method_nm; symbol_table& symtab = __get_symbol_table__ ("base_parser::make_superclass_ref"); octave_value fcn = symtab.find_built_in_function ("__superclass_reference__"); return new tree_funcall (fcn, args); } tree_funcall * base_parser::make_meta_class_query (const std::string& class_nm) { octave_value_list args; args(0) = class_nm; symbol_table& symtab = __get_symbol_table__ ("base_parser::make_meta_class_query"); octave_value fcn = symtab.find_built_in_function ("__meta_class_query__"); return new tree_funcall (fcn, args); } // A CLASSDEF block defines a class that has a constructor and other // methods, but it is not an executable command. Parsing the block // makes some changes in the symbol table (inserting the constructor // and methods, and adding to the list of known objects) and creates // a parse tree containing meta information about the class. tree_classdef * base_parser::make_classdef (token *tok_val, tree_classdef_attribute_list *a, tree_identifier *id, tree_classdef_superclass_list *sc, tree_classdef_body *body, token *end_tok, comment_list *lc) { tree_classdef *retval = nullptr; m_lexer.symtab_context.pop (); std::string cls_name = id->name (); std::string nm = m_lexer.fcn_file_name; size_t pos = nm.find_last_of (sys::file_ops::dir_sep_chars ()); if (pos != std::string::npos) nm = m_lexer.fcn_file_name.substr (pos+1); if (nm != cls_name) { delete a; delete id; delete sc; delete body; bison_error ("invalid classdef definition, the class name must match the filename"); } else { if (end_token_ok (end_tok, token::classdef_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = tok_val->line (); int c = tok_val->column (); if (! body) body = new tree_classdef_body (); retval = new tree_classdef (a, id, sc, body, lc, tc, m_curr_package_name, l, c); } else { delete a; delete id; delete sc; delete body; end_token_error (end_tok, token::switch_end); } } return retval; } tree_classdef_properties_block * base_parser::make_classdef_properties_block (token *tok_val, tree_classdef_attribute_list *a, tree_classdef_property_list *plist, token *end_tok, comment_list *lc) { tree_classdef_properties_block *retval = nullptr; if (end_token_ok (end_tok, token::properties_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = tok_val->line (); int c = tok_val->column (); if (! plist) plist = new tree_classdef_property_list (); retval = new tree_classdef_properties_block (a, plist, lc, tc, l, c); } else { delete a; delete plist; end_token_error (end_tok, token::properties_end); } return retval; } tree_classdef_methods_block * base_parser::make_classdef_methods_block (token *tok_val, tree_classdef_attribute_list *a, tree_classdef_methods_list *mlist, token *end_tok, comment_list *lc) { tree_classdef_methods_block *retval = nullptr; if (end_token_ok (end_tok, token::methods_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = tok_val->line (); int c = tok_val->column (); if (! mlist) mlist = new tree_classdef_methods_list (); retval = new tree_classdef_methods_block (a, mlist, lc, tc, l, c); } else { delete a; delete mlist; end_token_error (end_tok, token::methods_end); } return retval; } tree_classdef_events_block * base_parser::make_classdef_events_block (token *tok_val, tree_classdef_attribute_list *a, tree_classdef_events_list *elist, token *end_tok, comment_list *lc) { tree_classdef_events_block *retval = nullptr; if (end_token_ok (end_tok, token::events_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = tok_val->line (); int c = tok_val->column (); if (! elist) elist = new tree_classdef_events_list (); retval = new tree_classdef_events_block (a, elist, lc, tc, l, c); } else { delete a; delete elist; end_token_error (end_tok, token::events_end); } return retval; } tree_classdef_enum_block * base_parser::make_classdef_enum_block (token *tok_val, tree_classdef_attribute_list *a, tree_classdef_enum_list *elist, token *end_tok, comment_list *lc) { tree_classdef_enum_block *retval = nullptr; if (end_token_ok (end_tok, token::enumeration_end)) { comment_list *tc = m_lexer.comment_buf.get_comment (); int l = tok_val->line (); int c = tok_val->column (); if (! elist) elist = new tree_classdef_enum_list (); retval = new tree_classdef_enum_block (a, elist, lc, tc, l, c); } else { delete a; delete elist; end_token_error (end_tok, token::enumeration_end); } return retval; } octave_user_function* base_parser::start_classdef_external_method (tree_identifier *id, tree_parameter_list *pl) { octave_user_function* retval = nullptr; // External methods are only allowed within @-folders. In this case, // m_curr_class_name will be non-empty. if (! m_curr_class_name.empty ()) { std::string mname = id->name (); // Methods that cannot be declared outside the classdef file: // - methods with '.' character (e.g. property accessors) // - class constructor // - `delete' if (mname.find_first_of (".") == std::string::npos && mname != "delete" && mname != m_curr_class_name) { // Create a dummy function that is used until the real method // is loaded. retval = new octave_user_function (nullptr, pl); retval->stash_function_name (mname); int l = id->line (); int c = id->column (); retval->stash_fcn_location (l, c); } else bison_error ("invalid external method declaration, an external " "method cannot be the class constructor, `delete' " "or have a dot (.) character in its name"); } else bison_error ("external methods are only allowed in @-folders"); if (! retval) delete id; return retval; } tree_function_def * base_parser::finish_classdef_external_method (octave_user_function *fcn, tree_parameter_list *ret_list, comment_list *cl) { if (ret_list) fcn->define_ret_list (ret_list); if (cl) fcn->stash_leading_comment (cl); int l = fcn->beginning_line (); int c = fcn->beginning_column (); return new tree_function_def (fcn, l, c); } // Make an index expression. tree_index_expression * base_parser::make_index_expression (tree_expression *expr, tree_argument_list *args, char type) { tree_index_expression *retval = nullptr; if (args && args->has_magic_tilde ()) { delete expr; delete args; bison_error ("invalid use of empty argument (~) in index expression"); } else { int l = expr->line (); int c = expr->column (); if (! expr->is_postfix_indexed ()) expr->set_postfix_index (type); if (expr->is_index_expression ()) { tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); tmp->append (args, type); retval = tmp; } else retval = new tree_index_expression (expr, args, l, c, type); } return retval; } // Make an indirect reference expression. tree_index_expression * base_parser::make_indirect_ref (tree_expression *expr, const std::string& elt) { tree_index_expression *retval = nullptr; int l = expr->line (); int c = expr->column (); if (! expr->is_postfix_indexed ()) expr->set_postfix_index ('.'); if (expr->is_index_expression ()) { tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); tmp->append (elt); retval = tmp; } else retval = new tree_index_expression (expr, elt, l, c); m_lexer.looking_at_indirect_ref = false; return retval; } // Make an indirect reference expression with dynamic field name. tree_index_expression * base_parser::make_indirect_ref (tree_expression *expr, tree_expression *elt) { tree_index_expression *retval = nullptr; int l = expr->line (); int c = expr->column (); if (! expr->is_postfix_indexed ()) expr->set_postfix_index ('.'); if (expr->is_index_expression ()) { tree_index_expression *tmp = static_cast<tree_index_expression *> (expr); tmp->append (elt); retval = tmp; } else retval = new tree_index_expression (expr, elt, l, c); m_lexer.looking_at_indirect_ref = false; return retval; } // Make a declaration command. tree_decl_command * base_parser::make_decl_command (int tok, token *tok_val, tree_decl_init_list *lst) { tree_decl_command *retval = nullptr; int l = tok_val->line (); int c = tok_val->column (); switch (tok) { case GLOBAL: { retval = new tree_decl_command ("global", lst, l, c); retval->mark_global (); } break; case PERSISTENT: if (m_curr_fcn_depth > 0) { retval = new tree_decl_command ("persistent", lst, l, c); retval->mark_persistent (); } else { if (m_lexer.reading_script_file) warning ("ignoring persistent declaration near line %d of file '%s'", l, m_lexer.fcn_file_full_name.c_str ()); else warning ("ignoring persistent declaration near line %d", l); } break; default: panic_impossible (); break; } return retval; } bool base_parser::validate_param_list (tree_parameter_list *lst, tree_parameter_list::in_or_out type) { std::set<std::string> dict; for (tree_decl_elt *elt : *lst) { tree_identifier *id = elt->ident (); if (id) { std::string name = id->name (); if (id->is_black_hole ()) { if (type != tree_parameter_list::in) { bison_error ("invalid use of ~ in output list"); return false; } } else if (dict.find (name) != dict.end ()) { bison_error ("'" + name + "' appears more than once in parameter list"); return false; } else dict.insert (name); } } std::string va_type = (type == tree_parameter_list::in ? "varargin" : "varargout"); size_t len = lst->length (); if (len > 0) { tree_decl_elt *elt = lst->back (); tree_identifier *id = elt->ident (); if (id && id->name () == va_type) { if (len == 1) lst->mark_varargs_only (); else lst->mark_varargs (); tree_parameter_list::iterator p = lst->end (); --p; delete *p; lst->erase (p); } } return true; } bool base_parser::validate_array_list (tree_expression *e) { bool retval = true; tree_array_list *al = dynamic_cast<tree_array_list *> (e); for (tree_argument_list* row : *al) { if (row && row->has_magic_tilde ()) { retval = false; if (e->is_matrix ()) bison_error ("invalid use of tilde (~) in matrix expression"); else bison_error ("invalid use of tilde (~) in cell expression"); break; } } return retval; } tree_argument_list * base_parser::validate_matrix_for_assignment (tree_expression *e) { tree_argument_list *retval = nullptr; if (e->is_constant ()) { tree_evaluator& tw = __get_evaluator__ ("validate_matrix_for_assignment"); octave_value ov = tw.evaluate (e); delete e; if (ov.isempty ()) bison_error ("invalid empty left hand side of assignment"); else bison_error ("invalid constant left hand side of assignment"); } else { bool is_simple_assign = true; tree_argument_list *tmp = nullptr; if (e->is_matrix ()) { tree_matrix *mat = dynamic_cast<tree_matrix *> (e); if (mat && mat->size () == 1) { tmp = mat->front (); mat->pop_front (); delete e; is_simple_assign = false; } } else tmp = new tree_argument_list (e); if (tmp && tmp->is_valid_lvalue_list ()) { m_lexer.mark_as_variables (tmp->variable_names ()); retval = tmp; } else { delete tmp; bison_error ("invalid left hand side of assignment"); } if (retval && is_simple_assign) retval->mark_as_simple_assign_lhs (); } return retval; } // Finish building an array_list. tree_expression * base_parser::finish_array_list (tree_array_list *array_list) { tree_expression *retval = array_list; unwind_protect frame; frame.protect_var (discard_error_messages); frame.protect_var (discard_warning_messages); discard_error_messages = true; discard_warning_messages = true; if (array_list->all_elements_are_constant ()) { try { tree_evaluator& tw = __get_evaluator__ ("finish_array_list"); octave_value tmp = tw.evaluate (array_list); tree_constant *tc_retval = new tree_constant (tmp, array_list->line (), array_list->column ()); std::ostringstream buf; tree_print_code tpc (buf); array_list->accept (tpc); tc_retval->stash_original_text (buf.str ()); delete array_list; retval = tc_retval; } catch (const execution_exception&) { interpreter::recover_from_exception (); } } return retval; } // Finish building a matrix list. tree_expression * base_parser::finish_matrix (tree_matrix *m) { return (m ? finish_array_list (m) : new tree_constant (octave_null_matrix::instance)); } // Finish building a cell list. tree_expression * base_parser::finish_cell (tree_cell *c) { return (c ? finish_array_list (c) : new tree_constant (octave_value (Cell ()))); } void base_parser::maybe_warn_missing_semi (tree_statement_list *t) { if (m_curr_fcn_depth > 0) { tree_statement *tmp = t->back (); if (tmp->is_expression ()) warning_with_id ("Octave:missing-semicolon", "missing semicolon near line %d, column %d in file '%s'", tmp->line (), tmp->column (), m_lexer.fcn_file_full_name.c_str ()); } } tree_statement_list * base_parser::set_stmt_print_flag (tree_statement_list *list, char sep, bool warn_missing_semi) { tree_statement *tmp = list->back (); switch (sep) { case ';': tmp->set_print_flag (false); break; case 0: case ',': case '\n': tmp->set_print_flag (true); if (warn_missing_semi) maybe_warn_missing_semi (list); break; default: warning ("unrecognized separator type!"); break; } // Even if a statement is null, we add it to the list then remove it // here so that the print flag is applied to the correct statement. if (tmp->is_null_statement ()) { list->pop_back (); delete tmp; } return list; } // Finish building a statement. template <typename T> tree_statement * base_parser::make_statement (T *arg) { comment_list *comment = m_lexer.get_comment (); return new tree_statement (arg, comment); } tree_statement_list * base_parser::make_statement_list (tree_statement *stmt) { return new tree_statement_list (stmt); } tree_statement_list * base_parser::append_statement_list (tree_statement_list *list, char sep, tree_statement *stmt, bool warn_missing_semi) { set_stmt_print_flag (list, sep, warn_missing_semi); list->append (stmt); return list; } void base_parser::bison_error (const std::string& str, int l, int c) { int err_line = l < 0 ? m_lexer.input_line_number : l; int err_col = c < 0 ? m_lexer.current_input_column - 1 : c; std::ostringstream output_buf; if (m_lexer.reading_fcn_file || m_lexer.reading_script_file || m_lexer.reading_classdef_file) output_buf << "parse error near line " << err_line << " of file " << m_lexer.fcn_file_full_name; else output_buf << "parse error:"; if (str != "parse error") output_buf << "\n\n " << str; output_buf << "\n\n"; std::string curr_line = m_lexer.current_input_line; if (! curr_line.empty ()) { size_t len = curr_line.length (); if (curr_line[len-1] == '\n') curr_line.resize (len-1); // Print the line, maybe with a pointer near the error token. output_buf << ">>> " << curr_line << "\n"; if (err_col == 0) err_col = len; for (int i = 0; i < err_col + 3; i++) output_buf << " "; output_buf << "^"; } output_buf << "\n"; m_parse_error_msg = output_buf.str (); } int parser::run (void) { int status = -1; yypstate *pstate = static_cast<yypstate *> (m_parser_state); try { status = octave_pull_parse (pstate, *this); } catch (execution_exception& e) { std::string file = m_lexer.fcn_file_full_name; if (file.empty ()) error (e, "parse error"); else error (e, "parse error in %s", file.c_str ()); } catch (const exit_exception&) { throw; } catch (interrupt_exception &) { throw; } catch (...) { std::string file = m_lexer.fcn_file_full_name; if (file.empty ()) error ("unexpected exception while parsing input"); else error ("unexpected exception while parsing %s", file.c_str ()); } if (status != 0) parse_error ("%s", m_parse_error_msg.c_str ()); return status; } // Parse input from INPUT. Pass TRUE for EOF if the end of INPUT should // finish the parse. int push_parser::run (const std::string& input, bool eof) { int status = -1; dynamic_cast<push_lexer&> (m_lexer).append_input (input, eof); do { YYSTYPE lval; int token = octave_lex (&lval, m_lexer.scanner); if (token < 0) { if (! eof && m_lexer.at_end_of_buffer ()) { status = -1; break; } } yypstate *pstate = static_cast<yypstate *> (m_parser_state); try { status = octave_push_parse (pstate, token, &lval, *this); } catch (execution_exception& e) { std::string file = m_lexer.fcn_file_full_name; if (file.empty ()) error (e, "parse error"); else error (e, "parse error in %s", file.c_str ()); } catch (const exit_exception&) { throw; } catch (interrupt_exception &) { throw; } catch (...) { std::string file = m_lexer.fcn_file_full_name; if (file.empty ()) error ("unexpected exception while parsing input"); else error ("unexpected exception while parsing %s", file.c_str ()); } } while (status == YYPUSH_MORE); if (status != 0) parse_error ("%s", m_parse_error_msg.c_str ()); return status; } } static void safe_fclose (FILE *f) { if (f) fclose (static_cast<FILE *> (f)); } static octave_value parse_fcn_file (const std::string& full_file, const std::string& file, const std::string& dir_name, const std::string& dispatch_type, const std::string& package_name, bool require_file, bool force_script, bool autoload, bool relative_lookup, const std::string& warn_for) { octave_value retval; octave::unwind_protect frame; octave_function *fcn_ptr = nullptr; // Open function file and parse. FILE *in_stream = octave::command_editor::get_input_stream (); frame.add_fcn (octave::command_editor::set_input_stream, in_stream); frame.add_fcn (octave::command_history::ignore_entries, octave::command_history::ignoring_entries ()); octave::command_history::ignore_entries (); FILE *ffile = nullptr; if (! full_file.empty ()) ffile = std::fopen (full_file.c_str (), "rb"); if (ffile) { frame.add_fcn (safe_fclose, ffile); octave::parser parser (ffile); parser.m_curr_class_name = dispatch_type; parser.m_curr_package_name = package_name; parser.m_autoloading = autoload; parser.m_fcn_file_from_relative_lookup = relative_lookup; parser.m_lexer.force_script = force_script; parser.m_lexer.prep_for_file (); parser.m_lexer.parsing_class_method = ! dispatch_type.empty (); parser.m_lexer.fcn_file_name = file; parser.m_lexer.fcn_file_full_name = full_file; parser.m_lexer.dir_name = dir_name; parser.m_lexer.package_name = package_name; int status = parser.run (); fcn_ptr = parser.m_primary_fcn_ptr; if (status == 0) { if (parser.m_lexer.reading_classdef_file && parser.m_classdef_object) { // Convert parse tree for classdef object to // meta.class info (and stash it in the symbol // table?). Return pointer to constructor? if (fcn_ptr) panic_impossible (); bool is_at_folder = ! dispatch_type.empty (); octave::interpreter& interp = octave::__get_interpreter__ ("parse_fcn_file"); fcn_ptr = parser.m_classdef_object->make_meta_class (interp, is_at_folder); if (fcn_ptr) retval = octave_value (fcn_ptr); delete (parser.m_classdef_object); parser.m_classdef_object = nullptr; } else if (fcn_ptr) { retval = octave_value (fcn_ptr); fcn_ptr->maybe_relocate_end (); if (parser.m_parsing_subfunctions) { if (! parser.m_endfunction_found) parser.m_subfunction_names.reverse (); fcn_ptr->stash_subfunction_names (parser.m_subfunction_names); } } } else error ("parse error while reading file %s", full_file.c_str ()); } else if (require_file) error ("no such file, '%s'", full_file.c_str ()); else if (! warn_for.empty ()) error ("%s: unable to open file '%s'", warn_for.c_str (), full_file.c_str ()); return retval; } namespace octave { std::string get_help_from_file (const std::string& nm, bool& symbol_found, std::string& full_file) { std::string retval; full_file = fcn_file_in_path (nm); std::string file = full_file; size_t file_len = file.length (); if ((file_len > 4 && file.substr (file_len-4) == ".oct") || (file_len > 4 && file.substr (file_len-4) == ".mex") || (file_len > 2 && file.substr (file_len-2) == ".m")) { file = sys::env::base_pathname (file); file = file.substr (0, file.find_last_of ('.')); size_t pos = file.find_last_of (sys::file_ops::dir_sep_str ()); if (pos != std::string::npos) file = file.substr (pos+1); } if (! file.empty ()) { symbol_found = true; octave_value ov_fcn = parse_fcn_file (full_file, file, "", "", "", true, false, false, false, ""); if (ov_fcn.is_defined ()) { octave_function *fcn = ov_fcn.function_value (); if (fcn) retval = fcn->doc_string (); } } return retval; } std::string get_help_from_file (const std::string& nm, bool& symbol_found) { std::string file; return get_help_from_file (nm, symbol_found, file); } std::string lookup_autoload (const std::string& nm) { std::string retval; typedef std::map<std::string, std::string>::const_iterator am_iter; am_iter p = autoload_map.find (nm); if (p != autoload_map.end ()) { load_path& lp = __get_load_path__ ("lookup_autoload"); retval = lp.find_file (p->second); } return retval; } string_vector autoloaded_functions (void) { string_vector names (autoload_map.size ()); octave_idx_type i = 0; for (const auto& fcn_fname : autoload_map) names[i++] = fcn_fname.first; return names; } string_vector reverse_lookup_autoload (const std::string& nm) { string_vector names; for (const auto& fcn_fname : autoload_map) if (nm == fcn_fname.second) names.append (fcn_fname.first); return names; } octave_value load_fcn_from_file (const std::string& file_name, const std::string& dir_name, const std::string& dispatch_type, const std::string& package_name, const std::string& fcn_name, bool autoload) { octave_value retval; unwind_protect frame; std::string nm = file_name; size_t nm_len = nm.length (); std::string file; bool relative_lookup = false; file = nm; if ((nm_len > 4 && nm.substr (nm_len-4) == ".oct") || (nm_len > 4 && nm.substr (nm_len-4) == ".mex") || (nm_len > 2 && nm.substr (nm_len-2) == ".m")) { nm = sys::env::base_pathname (file); nm = nm.substr (0, nm.find_last_of ('.')); size_t pos = nm.find_last_of (sys::file_ops::dir_sep_str ()); if (pos != std::string::npos) nm = nm.substr (pos+1); } relative_lookup = ! sys::env::absolute_pathname (file); file = sys::env::make_absolute (file); int len = file.length (); dynamic_loader& dyn_loader = __get_dynamic_loader__ ("~octave_mex_function"); if (len > 4 && file.substr (len-4, len-1) == ".oct") { if (autoload && ! fcn_name.empty ()) nm = fcn_name; octave_function *tmpfcn = dyn_loader.load_oct (nm, file, relative_lookup); retval = octave_value (tmpfcn); } else if (len > 4 && file.substr (len-4, len-1) == ".mex") { // Temporarily load m-file version of mex-file, if it exists, // to get the help-string to use. std::string doc_string; octave_value ov_fcn = parse_fcn_file (file.substr (0, len - 2), nm, dir_name, dispatch_type, package_name, false, autoload, autoload, relative_lookup, ""); if (ov_fcn.is_defined ()) { octave_function *tmpfcn = ov_fcn.function_value (); if (tmpfcn) doc_string = tmpfcn->doc_string (); } octave_function *tmpfcn = dyn_loader.load_mex (nm, file, relative_lookup); if (tmpfcn) { tmpfcn->document (doc_string); retval = octave_value (tmpfcn); } } else if (len > 2) { retval = parse_fcn_file (file, nm, dir_name, dispatch_type, package_name, true, autoload, autoload, relative_lookup, ""); } return retval; } } DEFMETHOD (autoload, interp, args, , doc: /* -*- texinfo -*- @deftypefn {} {@var{autoload_map} =} autoload () @deftypefnx {} {} autoload (@var{function}, @var{file}) @deftypefnx {} {} autoload (@dots{}, "remove") Define @var{function} to autoload from @var{file}. The second argument, @var{file}, should be an absolute filename or a file name in the same directory as the function or script from which the autoload command was run. @var{file} @emph{should not} depend on the Octave load path. Normally, calls to @code{autoload} appear in PKG_ADD script files that are evaluated when a directory is added to Octave's load path. To avoid having to hardcode directory names in @var{file}, if @var{file} is in the same directory as the PKG_ADD script then @example autoload ("foo", "bar.oct"); @end example @noindent will load the function @code{foo} from the file @code{bar.oct}. The above usage when @code{bar.oct} is not in the same directory, or usages such as @example autoload ("foo", file_in_loadpath ("bar.oct")) @end example @noindent are strongly discouraged, as their behavior may be unpredictable. With no arguments, return a structure containing the current autoload map. If a third argument @qcode{"remove"} is given, the function is cleared and not loaded anymore during the current Octave session. @seealso{PKG_ADD} @end deftypefn */) { octave_value retval; int nargin = args.length (); if (nargin == 1 || nargin > 3) print_usage (); if (nargin == 0) { Cell func_names (dim_vector (autoload_map.size (), 1)); Cell file_names (dim_vector (autoload_map.size (), 1)); octave_idx_type i = 0; for (const auto& fcn_fname : autoload_map) { func_names(i) = fcn_fname.first; file_names(i) = fcn_fname.second; i++; } octave_map m; m.assign ("function", func_names); m.assign ("file", file_names); retval = m; } else { string_vector argv = args.make_argv ("autoload"); std::string nm = argv[2]; if (! octave::sys::env::absolute_pathname (nm)) { octave::call_stack& cs = interp.get_call_stack (); octave_user_code *fcn = cs.caller_user_code (); bool found = false; if (fcn) { std::string fname = fcn->fcn_file_name (); if (! fname.empty ()) { fname = octave::sys::env::make_absolute (fname); fname = fname.substr (0, fname.find_last_of (octave::sys::file_ops::dir_sep_str ()) + 1); octave::sys::file_stat fs (fname + nm); if (fs.exists ()) { nm = fname + nm; found = true; } } } if (! found) warning_with_id ("Octave:autoload-relative-file-name", "autoload: '%s' is not an absolute filename", nm.c_str ()); } if (nargin == 2) autoload_map[argv[1]] = nm; else if (nargin == 3) { if (argv[3] != "remove") error_with_id ("Octave:invalid-input-arg", "autoload: third argument can only be 'remove'"); // Remove function from symbol table and autoload map. octave::symbol_table& symtab = interp.get_symbol_table (); symtab.clear_dld_function (argv[1]); autoload_map.erase (argv[1]); } } return retval; } namespace octave { void source_file (const std::string& file_name, const std::string& context, bool verbose, bool require_file, const std::string& warn_for) { // Map from absolute name of script file to recursion level. We // use a map instead of simply placing a limit on recursion in the // source_file function so that two mutually recursive scripts // written as // // foo1.m: // ------ // foo2 // // foo2.m: // ------ // foo1 // // and called with // // foo1 // // (for example) will behave the same if they are written as // // foo1.m: // ------ // source ("foo2.m") // // foo2.m: // ------ // source ("foo1.m") // // and called with // // source ("foo1.m") // // (for example). static std::map<std::string, int> source_call_depth; std::string file_full_name = sys::file_ops::tilde_expand (file_name); size_t pos = file_full_name.find_last_of (sys::file_ops::dir_sep_str ()); std::string dir_name = file_full_name.substr (0, pos); file_full_name = sys::env::make_absolute (file_full_name); unwind_protect frame; if (source_call_depth.find (file_full_name) == source_call_depth.end ()) source_call_depth[file_full_name] = -1; frame.protect_var (source_call_depth[file_full_name]); source_call_depth[file_full_name]++; tree_evaluator& tw = __get_evaluator__ ("source_file"); if (source_call_depth[file_full_name] >= tw.max_recursion_depth ()) error ("max_recursion_depth exceeded"); if (! context.empty ()) { call_stack& cs = __get_call_stack__ ("source_file"); if (context == "caller") cs.goto_caller_frame (); else if (context == "base") cs.goto_base_frame (); else error ("source: context must be \"caller\" or \"base\""); frame.add_method (cs, &call_stack::pop); } // Find symbol name that would be in symbol_table, if it were loaded. size_t dir_end = file_name.find_last_of (sys::file_ops::dir_sep_chars ()); dir_end = (dir_end == std::string::npos) ? 0 : dir_end + 1; size_t extension = file_name.find_last_of ('.'); if (extension == std::string::npos) extension = file_name.length (); std::string symbol = file_name.substr (dir_end, extension - dir_end); std::string full_name = sys::canonicalize_file_name (file_name); // Check if this file is already loaded (or in the path) symbol_table& symtab = __get_symbol_table__ ("source_file"); octave_value ov_code = symtab.find (symbol); if (ov_code.is_user_script ()) { octave_user_script *script = ov_code.user_script_value (); if (! script || (sys::canonicalize_file_name (script->fcn_file_name ()) != full_name)) { // Wrong file, so load it below. ov_code = octave_value (); } } else { // Not a script, so load it below. ov_code = octave_value (); } // If no symbol of this name, or the symbol is for a different // file, load. if (ov_code.is_undefined ()) { try { ov_code = parse_fcn_file (file_full_name, file_name, dir_name, "", "", require_file, true, false, false, warn_for); } catch (execution_exception& e) { error (e, "source: error sourcing file '%s'", file_full_name.c_str ()); } } // Return or error if we don't have a valid script if (ov_code.is_undefined ()) return; if (! ov_code.is_user_script ()) error ("source: %s is not a script", full_name.c_str ()); if (verbose) { std::cout << "executing commands from " << full_name << " ... "; std::cout.flush (); } octave_user_script *script = ov_code.user_script_value (); script->call (tw, 0); if (verbose) std::cout << "done." << std::endl; } } DEFMETHOD (mfilename, interp, args, , doc: /* -*- texinfo -*- @deftypefn {} {} mfilename () @deftypefnx {} {} mfilename ("fullpath") @deftypefnx {} {} mfilename ("fullpathext") Return the name of the currently executing file. When called from outside an m-file return the empty string. Given the argument @qcode{"fullpath"}, include the directory part of the filename, but not the extension. Given the argument @qcode{"fullpathext"}, include the directory part of the filename and the extension. @end deftypefn */) { octave_value retval; int nargin = args.length (); if (nargin > 1) print_usage (); std::string arg; if (nargin == 1) arg = args(0).xstring_value ("mfilename: argument must be a string"); std::string fname; octave::call_stack& cs = interp.get_call_stack (); octave_user_code *fcn = cs.caller_user_code (); if (fcn) { fname = fcn->fcn_file_name (); if (fname.empty ()) fname = fcn->name (); } if (arg == "fullpathext") retval = fname; else { size_t dpos = fname.rfind (octave::sys::file_ops::dir_sep_char ()); size_t epos = fname.rfind ('.'); if (epos <= dpos) epos = std::string::npos; fname = (epos != std::string::npos) ? fname.substr (0, epos) : fname; if (arg == "fullpath") retval = fname; else retval = (dpos != std::string::npos) ? fname.substr (dpos+1) : fname; } return retval; } DEFUN (source, args, , doc: /* -*- texinfo -*- @deftypefn {} {} source (@var{file}) @deftypefnx {} {} source (@var{file}, @var{context}) Parse and execute the contents of @var{file}. Without specifying @var{context}, this is equivalent to executing commands from a script file, but without requiring the file to be named @file{@var{file}.m} or to be on the execution path. Instead of the current context, the script may be executed in either the context of the function that called the present function (@qcode{"caller"}), or the top-level context (@qcode{"base"}). @seealso{run} @end deftypefn */) { octave_value_list retval; int nargin = args.length (); if (nargin < 1 || nargin > 2) print_usage (); std::string file_name = args(0).xstring_value ("source: FILE must be a string"); std::string context; if (nargin == 2) context = args(1).xstring_value ("source: CONTEXT must be a string"); octave::source_file (file_name, context); return retval; } namespace octave { /*! Evaluate an Octave function (built-in or interpreted) and return the list of result values. @param name The name of the function to call. @param args The arguments to the function. @param nargout The number of output arguments expected. @return A list of output values. The length of the list is not necessarily the same as @c nargout. */ octave_value_list feval (const std::string& name, const octave_value_list& args, int nargout) { octave_value_list retval; symbol_table& symtab = __get_symbol_table__ ("feval"); octave_value fcn = symtab.find_function (name, args); if (fcn.is_defined ()) { tree_evaluator& tw = __get_evaluator__ ("feval"); octave_function *of = fcn.function_value (); retval = of->call (tw, nargout, args); } else error ("feval: function '%s' not found", name.c_str ()); return retval; } octave_value_list feval (octave_function *fcn, const octave_value_list& args, int nargout) { octave_value_list retval; if (fcn) { tree_evaluator& tw = __get_evaluator__ ("feval"); retval = fcn->call (tw, nargout, args); } return retval; } octave_value_list feval (octave_value& val, const octave_value_list& args, int nargout) { if (val.is_function ()) { return feval (val.function_value (), args, nargout); } else if (val.is_function_handle ()) { // This covers function handles, inline functions, and anonymous // functions. std::list<octave_value_list> arg_list; arg_list.push_back (args); return val.subsref ("(", arg_list, nargout); } else if (val.is_string ()) { return feval (val.string_value (), args, nargout); } else error ("feval: first argument must be a string, inline function, or a function handle"); return ovl (); } } static octave_value_list get_feval_args (const octave_value_list& args) { return args.slice (1, args.length () - 1, true); } namespace octave { /*! Evaluate an Octave function (built-in or interpreted) and return the list of result values. @param args The first element of @c args is the function to call. It may be the name of the function as a string, a function handle, or an inline function. The remaining arguments are passed to the function. @param nargout The number of output arguments expected. @return A list of output values. The length of the list is not necessarily the same as @c nargout. */ octave_value_list feval (const octave_value_list& args, int nargout) { if (args.length () > 0) { octave_value f_arg = args(0); octave_value_list tmp_args = get_feval_args (args); return feval (f_arg, tmp_args, nargout); } else error ("feval: first argument must be a string, inline function, or a function handle"); return ovl (); } } DEFUN (feval, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {} feval (@var{name}, @dots{}) Evaluate the function named @var{name}. Any arguments after the first are passed as inputs to the named function. For example, @example @group feval ("acos", -1) @result{} 3.1416 @end group @end example @noindent calls the function @code{acos} with the argument @samp{-1}. The function @code{feval} can also be used with function handles of any sort (@pxref{Function Handles}). Historically, @code{feval} was the only way to call user-supplied functions in strings, but function handles are now preferred due to the cleaner syntax they offer. For example, @example @group @var{f} = @@exp; feval (@var{f}, 1) @result{} 2.7183 @var{f} (1) @result{} 2.7183 @end group @end example @noindent are equivalent ways to call the function referred to by @var{f}. If it cannot be predicted beforehand whether @var{f} is a function handle, function name in a string, or inline function then @code{feval} can be used instead. @end deftypefn */) { if (args.length () == 0) print_usage (); return octave::feval (args, nargout); } DEFMETHOD (builtin, interp, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {[@dots{}] =} builtin (@var{f}, @dots{}) Call the base function @var{f} even if @var{f} is overloaded to another function for the given type signature. This is normally useful when doing object-oriented programming and there is a requirement to call one of Octave's base functions rather than the overloaded one of a new class. A trivial example which redefines the @code{sin} function to be the @code{cos} function shows how @code{builtin} works. @example @group sin (0) @result{} 0 function y = sin (x), y = cos (x); endfunction sin (0) @result{} 1 builtin ("sin", 0) @result{} 0 @end group @end example @end deftypefn */) { octave_value_list retval; if (args.length () == 0) print_usage (); const std::string name (args(0).xstring_value ("builtin: function name (F) must be a string")); octave::symbol_table& symtab = interp.get_symbol_table (); octave_value fcn = symtab.builtin_find (name); if (fcn.is_defined ()) retval = octave::feval (fcn.function_value (), args.splice (0, 1), nargout); else error ("builtin: lookup for symbol '%s' failed", name.c_str ()); return retval; } namespace octave { octave_value_list eval_string (const std::string& eval_str, bool silent, int& parse_status, int nargout) { octave_value_list retval; parser parser (eval_str); do { parser.reset (); parse_status = parser.run (); if (parse_status == 0) { if (parser.m_stmt_list) { tree_statement *stmt = nullptr; tree_evaluator& tw = __get_evaluator__ ("eval_string"); if (parser.m_stmt_list->length () == 1 && (stmt = parser.m_stmt_list->front ()) && stmt->is_expression ()) { tree_expression *expr = stmt->expression (); if (silent) expr->set_print_flag (false); bool do_bind_ans = false; if (expr->is_identifier ()) { tree_identifier *id = dynamic_cast<tree_identifier *> (expr); do_bind_ans = (! id->is_variable ()); } else do_bind_ans = (! expr->is_assignment_expression ()); retval = tw.evaluate_n (expr, nargout); if (do_bind_ans && ! retval.empty ()) tw.bind_ans (retval(0), expr->print_result ()); if (nargout == 0) retval = octave_value_list (); } else if (nargout == 0) parser.m_stmt_list->accept (tw); else error ("eval: invalid use of statement list"); if (tree_return_command::returning || tree_break_command::breaking || tree_continue_command::continuing) break; } else if (parser.m_lexer.end_of_input) break; } } while (parse_status == 0); return retval; } octave_value eval_string (const std::string& eval_str, bool silent, int& parse_status) { octave_value retval; octave_value_list tmp = eval_string (eval_str, silent, parse_status, 1); if (! tmp.empty ()) retval = tmp(0); return retval; } static octave_value_list eval_string (const octave_value& arg, bool silent, int& parse_status, int nargout) { std::string s = arg.xstring_value ("eval: expecting std::string argument"); return eval_string (s, silent, parse_status, nargout); } void cleanup_statement_list (tree_statement_list **lst) { if (*lst) { delete *lst; *lst = nullptr; } } } DEFUN (eval, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {} eval (@var{try}) @deftypefnx {} {} eval (@var{try}, @var{catch}) Parse the string @var{try} and evaluate it as if it were an Octave program. If execution fails, evaluate the optional string @var{catch}. The string @var{try} is evaluated in the current context, so any results remain available after @code{eval} returns. The following example creates the variable @var{A} with the approximate value of 3.1416 in the current workspace. @example eval ("A = acos(-1);"); @end example If an error occurs during the evaluation of @var{try} then the @var{catch} string is evaluated, as the following example shows: @example @group eval ('error ("This is a bad example");', 'printf ("This error occurred:\n%s\n", lasterr ());'); @print{} This error occurred: This is a bad example @end group @end example Programming Note: if you are only using @code{eval} as an error-capturing mechanism, rather than for the execution of arbitrary code strings, Consider using try/catch blocks or unwind_protect/unwind_protect_cleanup blocks instead. These techniques have higher performance and don't introduce the security considerations that the evaluation of arbitrary code does. @seealso{evalin, evalc, assignin, feval} @end deftypefn */) { octave_value_list retval; int nargin = args.length (); if (nargin == 0) print_usage (); octave::unwind_protect frame; if (nargin > 1) { frame.protect_var (buffer_error_messages); buffer_error_messages++; } int parse_status = 0; bool execution_error = false; octave_value_list tmp; try { tmp = octave::eval_string (args(0), nargout > 0, parse_status, nargout); } catch (const octave::execution_exception&) { octave::interpreter::recover_from_exception (); execution_error = true; } if (nargin > 1 && (parse_status != 0 || execution_error)) { // Set up for letting the user print any messages from // errors that occurred in the first part of this eval(). buffer_error_messages--; tmp = octave::eval_string (args(1), nargout > 0, parse_status, nargout); if (nargout > 0) retval = tmp; } else { if (nargout > 0) retval = tmp; // FIXME: we should really be rethrowing whatever exception occurred, // not just throwing an execution exception. if (execution_error) octave_throw_execution_exception (); } return retval; } /* %!shared x %! x = 1; %!assert (eval ("x"), 1) %!assert (eval ("x;")) %!assert (eval ("x;"), 1) %!test %! y = eval ("x"); %! assert (y, 1); %!test %! y = eval ("x;"); %! assert (y, 1); %!test %! eval ("x = 1;"); %! assert (x,1); %!test %! eval ("flipud = 2;"); %! assert (flipud, 2); %!function y = __f () %! eval ("flipud = 2;"); %! y = flipud; %!endfunction %!assert (__f(), 2) % bug #35645 %!test %! [a,] = gcd (1,2); %! [a,b,] = gcd (1, 2); %!error eval ("switch = 13;") */ DEFMETHOD (assignin, interp, args, , doc: /* -*- texinfo -*- @deftypefn {} {} assignin (@var{context}, @var{varname}, @var{value}) Assign @var{value} to @var{varname} in context @var{context}, which may be either @qcode{"base"} or @qcode{"caller"}. @seealso{evalin} @end deftypefn */) { octave_value_list retval; if (args.length () != 3) print_usage (); std::string context = args(0).xstring_value ("assignin: CONTEXT must be a string"); octave::unwind_protect frame; octave::call_stack& cs = interp.get_call_stack (); if (context == "caller") cs.goto_caller_frame (); else if (context == "base") cs.goto_base_frame (); else error ("assignin: CONTEXT must be \"caller\" or \"base\""); frame.add_method (cs, &octave::call_stack::pop); std::string nm = args(1).xstring_value ("assignin: VARNAME must be a string"); if (valid_identifier (nm)) { // Put the check here so that we don't slow down assignments // generally. Any that go through Octave's parser should have // already been checked. if (octave::is_keyword (nm)) error ("assignin: invalid assignment to keyword '%s'", nm.c_str ()); octave::symbol_table::scope *scope = interp.get_current_scope (); if (scope) scope->assign (nm, args(2)); } else error ("assignin: invalid variable name in argument VARNAME"); return retval; } /* %!error assignin ("base", "switch", "13") */ DEFMETHOD (evalin, interp, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {} evalin (@var{context}, @var{try}) @deftypefnx {} {} evalin (@var{context}, @var{try}, @var{catch}) Like @code{eval}, except that the expressions are evaluated in the context @var{context}, which may be either @qcode{"caller"} or @qcode{"base"}. @seealso{eval, assignin} @end deftypefn */) { octave_value_list retval; int nargin = args.length (); if (nargin < 2) print_usage (); std::string context = args(0).xstring_value ("evalin: CONTEXT must be a string"); octave::unwind_protect frame; octave::call_stack& cs = interp.get_call_stack (); if (context == "caller") cs.goto_caller_frame (); else if (context == "base") cs.goto_base_frame (); else error ("evalin: CONTEXT must be \"caller\" or \"base\""); frame.add_method (cs, &octave::call_stack::pop); if (nargin > 2) { frame.protect_var (buffer_error_messages); buffer_error_messages++; } int parse_status = 0; bool execution_error = false; octave_value_list tmp; try { tmp = octave::eval_string (args(1), nargout > 0, parse_status, nargout); } catch (const octave::execution_exception&) { octave::interpreter::recover_from_exception (); execution_error = true; } if (nargin > 2 && (parse_status != 0 || execution_error)) { // Set up for letting the user print any messages from // errors that occurred in the first part of this eval(). buffer_error_messages--; tmp = octave::eval_string (args(2), nargout > 0, parse_status, nargout); retval = (nargout > 0) ? tmp : octave_value_list (); } else { if (nargout > 0) retval = tmp; // FIXME: we should really be rethrowing whatever // exception occurred, not just throwing an // execution exception. if (execution_error) octave_throw_execution_exception (); } return retval; } static void maybe_print_last_error_message (bool *doit) { if (doit && *doit) // Print error message again, which was lost because of the stderr buffer // Note: this keeps error_state and last_error_stack intact message_with_id ("error", last_error_id ().c_str (), last_error_message ().c_str ()); } static void restore_octave_stdout (std::streambuf *buf) { octave_stdout.flush (); octave_stdout.rdbuf (buf); } static void restore_octave_stderr (std::streambuf *buf) { std::cerr.flush (); std::cerr.rdbuf (buf); } DEFUN (evalc, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {@var{s} =} evalc (@var{try}) @deftypefnx {} {@var{s} =} evalc (@var{try}, @var{catch}) Parse and evaluate the string @var{try} as if it were an Octave program, while capturing the output into the return variable @var{s}. If execution fails, evaluate the optional string @var{catch}. This function behaves like @code{eval}, but any output or warning messages which would normally be written to the console are captured and returned in the string @var{s}. The @code{diary} is disabled during the execution of this function. When @code{system} is used, any output produced by external programs is @emph{not} captured, unless their output is captured by the @code{system} function itself. @example @group s = evalc ("t = 42"), t @result{} s = t = 42 @result{} t = 42 @end group @end example @seealso{eval, diary} @end deftypefn */) { int nargin = args.length (); if (nargin == 0 || nargin > 2) print_usage (); // redirect stdout/stderr to capturing buffer std::ostringstream buffer; std::ostream& out_stream = octave_stdout; std::ostream& err_stream = std::cerr; out_stream.flush (); err_stream.flush (); std::streambuf* old_out_buf = out_stream.rdbuf (buffer.rdbuf ()); std::streambuf* old_err_buf = err_stream.rdbuf (buffer.rdbuf ()); bool eval_error_occurred = true; octave::unwind_protect frame; frame.add_fcn (maybe_print_last_error_message, &eval_error_occurred); frame.add_fcn (restore_octave_stdout, old_out_buf); frame.add_fcn (restore_octave_stderr, old_err_buf); // call standard eval function octave_value_list retval; int eval_nargout = std::max (0, nargout - 1); retval = Feval (args, eval_nargout); eval_error_occurred = false; retval.prepend (buffer.str ()); return retval; } /* %!assert (evalc ("1"), "ans = 1\n") %!assert (evalc ("1;"), "") %!test %! [s, y] = evalc ("1"); %! assert (s, ""); %! assert (y, 1); %!test %! [s, y] = evalc ("1;"); %! assert (s, ""); %! assert (y, 1); %!test %! assert (evalc ("y = 2"), "y = 2\n"); %! assert (y, 2); %!test %! assert (evalc ("y = 3;"), ""); %! assert (y, 3); %!test %! [s, a, b] = evalc ("deal (1, 2)"); %! assert (s, ""); %! assert (a, 1); %! assert (b, 2); %!function [a, b] = __f_evalc () %! printf ("foo"); %! fprintf (stdout, "bar"); %! disp (pi); %! a = 1; %! b = 2; %!endfunction %!test %! [s, a, b] = evalc ("__f_evalc ()"); %! assert (s, "foobar 3.1416\n"); %! assert (a, 1); %! assert (b, 2); %!error <foo> (evalc ("error ('foo')")) %!error <bar> (evalc ("error ('foo')", "error ('bar')")) %!test %! warning ("off", "quiet", "local"); %! assert (evalc ("warning ('foo')"), "warning: foo\n"); %!test %! warning ("off", "quiet", "local"); %! assert (evalc ("error ('foo')", "warning ('bar')"), "warning: bar\n"); %!error evalc ("switch = 13;") */ DEFUN (__parser_debug_flag__, args, nargout, doc: /* -*- texinfo -*- @deftypefn {} {@var{val} =} __parser_debug_flag__ () @deftypefnx {} {@var{old_val} =} __parser_debug_flag__ (@var{new_val}) Query or set the internal flag that determines whether Octave's parser prints debug information as it processes an expression. @seealso{__lexer_debug_flag__} @end deftypefn */) { octave_value retval; bool debug_flag = octave_debug; retval = set_internal_variable (debug_flag, args, nargout, "__parser_debug_flag__"); octave_debug = debug_flag; return retval; } DEFUN (__parse_file__, args, , doc: /* -*- texinfo -*- @deftypefn {} {} __parse_file__ (@var{file}, @var{verbose}) Undocumented internal function. @end deftypefn */) { octave_value retval; int nargin = args.length (); if (nargin < 1 || nargin > 2) print_usage (); std::string file = args(0).xstring_value ("__parse_file__: expecting filename as argument"); std::string full_file = octave::sys::file_ops::tilde_expand (file); full_file = octave::sys::env::make_absolute (full_file); std::string dir_name; size_t file_len = file.length (); if ((file_len > 4 && file.substr (file_len-4) == ".oct") || (file_len > 4 && file.substr (file_len-4) == ".mex") || (file_len > 2 && file.substr (file_len-2) == ".m")) { file = octave::sys::env::base_pathname (file); file = file.substr (0, file.find_last_of ('.')); size_t pos = file.find_last_of (octave::sys::file_ops::dir_sep_str ()); if (pos != std::string::npos) { dir_name = file.substr (0, pos); file = file.substr (pos+1); } } if (nargin == 2) octave_stdout << "parsing " << full_file << std::endl; octave_value ov_fcn = parse_fcn_file (full_file, file, dir_name, "", "", true, false, false, false, "__parse_file__"); return retval; }