Mercurial > octave
annotate src/lex.h @ 8701:1652e39b934e
handle command names in declaration lists
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 09 Feb 2009 12:23:12 -0500 |
| parents | ff9e7873f8ea |
| children | 6dc61981d18b |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, |
| 4 2003, 2004, 2005, 2006, 2007 John W. Eaton | |
| 1 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 1 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 1 | 21 |
| 22 */ | |
| 23 | |
| 383 | 24 #if !defined (octave_lex_h) |
| 25 #define octave_lex_h 1 | |
| 1 | 26 |
| 5775 | 27 // FIXME -- these input buffer things should be members of a |
| 1826 | 28 // parser input stream class. |
| 29 | |
| 1 | 30 typedef struct yy_buffer_state *YY_BUFFER_STATE; |
| 31 | |
| 32 // Associate a buffer with a new file to read. | |
| 33 extern YY_BUFFER_STATE create_buffer (FILE *f); | |
| 34 | |
| 35 // Report the current buffer. | |
| 36 extern YY_BUFFER_STATE current_buffer (void); | |
| 37 | |
| 38 // Connect to new buffer buffer. | |
| 39 extern void switch_to_buffer (YY_BUFFER_STATE buf); | |
| 40 | |
| 41 // Delete a buffer. | |
| 42 extern void delete_buffer (YY_BUFFER_STATE buf); | |
| 43 | |
| 44 // Restore a buffer (for unwind-prot). | |
| 45 extern void restore_input_buffer (void *buf); | |
| 46 | |
| 47 // Delete a buffer (for unwind-prot). | |
| 48 extern void delete_input_buffer (void *buf); | |
| 49 | |
| 4867 | 50 // Is the given string a keyword? |
| 51 extern bool is_keyword (const std::string& s); | |
| 52 | |
|
7715
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
53 extern void prep_lexer_for_script (void); |
|
5b4d278ec828
parse scripts completely before executing
John W. Eaton <jwe@octave.org>
parents:
7634
diff
changeset
|
54 |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
55 extern void force_local_variable (const std::string& name); |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
56 |
| 1826 | 57 // For communication between the lexer and parser. |
| 58 | |
| 3585 | 59 class |
| 60 lexical_feedback | |
| 1826 | 61 { |
| 62 public: | |
| 63 | |
| 64 lexical_feedback (void) { init (); } | |
| 65 | |
| 66 ~lexical_feedback (void) { } | |
| 67 | |
| 68 void init (void); | |
| 69 | |
| 3351 | 70 // Square bracket level count. |
| 71 int bracketflag; | |
| 1826 | 72 |
| 4613 | 73 // Curly brace level count. |
| 74 int braceflag; | |
| 75 | |
| 2877 | 76 // TRUE means we're in the middle of defining a loop. |
| 1826 | 77 int looping; |
| 78 | |
| 2877 | 79 // TRUE means that we should convert spaces to a comma inside a |
| 2857 | 80 // matrix definition. |
| 81 bool convert_spaces_to_comma; | |
| 82 | |
| 2877 | 83 // TRUE means we're in the middle of defining a function. |
| 2857 | 84 bool defining_func; |
| 85 | |
| 4930 | 86 // Nonzero means we are parsing a function handle. |
| 87 int looking_at_function_handle; | |
| 88 | |
| 2877 | 89 // TRUE means we're parsing the return list for a function. |
| 2857 | 90 bool looking_at_return_list; |
| 91 | |
| 2877 | 92 // TRUE means we're parsing the parameter list for a function. |
| 2857 | 93 bool looking_at_parameter_list; |
| 94 | |
|
8701
1652e39b934e
handle command names in declaration lists
John W. Eaton <jwe@octave.org>
parents:
8001
diff
changeset
|
95 // TRUE means we're parsing a declaration list (global or |
|
1652e39b934e
handle command names in declaration lists
John W. Eaton <jwe@octave.org>
parents:
8001
diff
changeset
|
96 // persistent). |
|
1652e39b934e
handle command names in declaration lists
John W. Eaton <jwe@octave.org>
parents:
8001
diff
changeset
|
97 bool looking_at_decl_list; |
|
1652e39b934e
handle command names in declaration lists
John W. Eaton <jwe@octave.org>
parents:
8001
diff
changeset
|
98 |
|
7634
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
99 // TRUE means we are looking at the initializer expression for a |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
100 // parameter list element. |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
101 bool looking_at_initializer_expression; |
|
ae90e05ad299
fix parameter list initializer bug
John W. Eaton <jwe@octave.org>
parents:
7336
diff
changeset
|
102 |
| 3189 | 103 // TRUE means we're parsing a matrix or the left hand side of |
| 104 // multi-value assignment statement. | |
| 105 bool looking_at_matrix_or_assign_lhs; | |
| 106 | |
| 4237 | 107 // Nonzero means we're parsing an indexing operation for an object. |
| 108 int looking_at_object_index; | |
| 4234 | 109 |
| 2857 | 110 // GAG. Stupid kludge so that [[1,2][3,4]] will work. |
| 111 bool do_comma_insert; | |
| 112 | |
| 5102 | 113 // TRUE means we're doing a raw input command. |
| 114 bool doing_rawcommand; | |
| 115 | |
| 2877 | 116 // TRUE means we're looking at an indirect reference to a |
| 2857 | 117 // structure element. |
| 118 bool looking_at_indirect_ref; | |
| 119 | |
| 2877 | 120 // TRUE means that we've already seen the name of this function. |
| 121 // Should only matter if defining_func is also TRUE. | |
| 122 bool parsed_function_name; | |
| 123 | |
| 4240 | 124 // Are we parsing a nested function? |
| 125 // 1 ==> Yes. | |
| 126 // 0 ==> No. | |
| 127 // -1 ==> Yes, but it is the last one because we have seen EOF. | |
| 128 int parsing_nested_function; | |
| 4238 | 129 |
| 7336 | 130 // TRUE means we are parsing a class method. |
| 131 bool parsing_class_method; | |
| 132 | |
| 1826 | 133 // Return transpose or start a string? |
| 2857 | 134 bool quote_is_transpose; |
| 1826 | 135 |
|
8001
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
136 // Set of identifiers that might be local variable names. |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
137 std::set<std::string> pending_local_variables; |
|
ff9e7873f8ea
improve handling of command-style names in matrix_or_assign_lhs context
John W. Eaton <jwe@octave.org>
parents:
7723
diff
changeset
|
138 |
| 1826 | 139 private: |
| 140 | |
| 141 lexical_feedback (const lexical_feedback&); | |
| 142 | |
| 143 lexical_feedback& operator = (const lexical_feedback&); | |
| 144 }; | |
| 145 | |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
146 class |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
147 stream_reader |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
148 { |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
149 public: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
150 virtual int getc (void) = 0; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
151 virtual int ungetc (int c) = 0; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
152 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
153 protected: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
154 stream_reader (void) { } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
155 ~stream_reader (void) { } |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
156 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
157 private: |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
158 |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
159 // No copying! |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
160 stream_reader (const stream_reader&); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
161 stream_reader& operator = (const stream_reader&); |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
162 }; |
|
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
163 |
|
7723
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
164 extern std::string |
|
74f5e0c7de9e
first pass at handling block comments
John W. Eaton <jwe@octave.org>
parents:
7720
diff
changeset
|
165 grab_comment_block (stream_reader& reader, bool at_bol, bool& eof); |
|
7720
4e2eafef689c
unify comment and help text processing in lex.l and parse.y
John W. Eaton <jwe@octave.org>
parents:
7715
diff
changeset
|
166 |
| 3883 | 167 // TRUE means that we have encountered EOF on the input stream. |
| 168 extern bool parser_end_of_input; | |
| 169 | |
| 1826 | 170 // Flags that need to be shared between the lexer and parser. |
| 171 extern lexical_feedback lexer_flags; | |
| 440 | 172 |
| 1 | 173 #endif |
| 174 | |
| 175 /* | |
| 176 ;;; Local Variables: *** | |
| 177 ;;; mode: C++ *** | |
| 178 ;;; End: *** | |
| 179 */ |