Mercurial > octave
view libinterp/parse-tree/pt-decl.h @ 31706:597f3ee61a48 stable
update Octave Project Developers copyright for the new year
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 06 Jan 2023 13:11:27 -0500 |
parents | aac27ad79be6 |
children | 21f9b34eb893 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2023 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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 // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if ! defined (octave_pt_decl_h) #define octave_pt_decl_h 1 #include "octave-config.h" #include <list> #include <string> #include "base-list.h" #include "oct-lvalue.h" #include "pt-cmd.h" #include "pt-id.h" #include "pt-walk.h" OCTAVE_BEGIN_NAMESPACE(octave) class symbol_scope; class tree_evaluator; class tree_expression; class tree_identifier; // List of expressions that make up a declaration statement. class tree_decl_elt { public: enum decl_type { unknown, global, persistent }; tree_decl_elt (tree_identifier *i, tree_expression *e = nullptr); // No copying! tree_decl_elt (const tree_decl_elt&) = delete; tree_decl_elt& operator = (const tree_decl_elt&) = delete; ~tree_decl_elt (void); void mark_as_formal_parameter (void) { m_id->mark_as_formal_parameter (); } bool lvalue_ok (void) { return m_id->lvalue_ok (); } octave_lvalue lvalue (tree_evaluator& tw) { return m_id->lvalue (tw); } void mark_global (void) { type = global; } bool is_global (void) const { return type == global; } void mark_persistent (void) { type = persistent; } bool is_persistent (void) const { return type == persistent; } tree_identifier * ident (void) { return m_id; } std::string name (void) const { return m_id->name (); } tree_expression * expression (void) { return m_expr; } tree_decl_elt * dup (symbol_scope& scope) const; void accept (tree_walker& tw) { tw.visit_decl_elt (*this); } private: decl_type type; // An identifier to tag with the declared property. tree_identifier *m_id; // An initializer expression (may be zero); tree_expression *m_expr; }; class tree_decl_init_list : public base_list<tree_decl_elt *> { public: tree_decl_init_list (void) { } tree_decl_init_list (tree_decl_elt *t) { append (t); } // No copying! tree_decl_init_list (const tree_decl_init_list&) = delete; tree_decl_init_list& operator = (const tree_decl_init_list&) = delete; ~tree_decl_init_list (void) { while (! empty ()) { auto p = begin (); delete *p; erase (p); } } void mark_global (void) { for (tree_decl_elt *elt : *this) elt->mark_global (); } void mark_persistent (void) { for (tree_decl_elt *elt : *this) elt->mark_persistent (); } std::list<std::string> variable_names (void) const { std::list<std::string> retval; for (const tree_decl_elt *elt : *this) { std::string nm = elt->name (); if (! nm.empty ()) retval.push_back (nm); } return retval; } void accept (tree_walker& tw) { tw.visit_decl_init_list (*this); } }; // Base class for declaration commands -- global, static, etc. class tree_decl_command : public tree_command { public: tree_decl_command (const std::string& n, int l = -1, int c = -1) : tree_command (l, c), m_cmd_name (n), m_init_list (nullptr) { } tree_decl_command (const std::string& n, tree_decl_init_list *t, int l = -1, int c = -1); // No copying! tree_decl_command (const tree_decl_command&) = delete; tree_decl_command& operator = (const tree_decl_command&) = delete; ~tree_decl_command (void); void mark_global (void) { if (m_init_list) m_init_list->mark_global (); } void mark_persistent (void) { if (m_init_list) m_init_list->mark_persistent (); } tree_decl_init_list * initializer_list (void) { return m_init_list; } std::string name (void) const { return m_cmd_name; } void accept (tree_walker& tw) { tw.visit_decl_command (*this); } private: // The name of this command -- global, static, etc. std::string m_cmd_name; // The list of variables or initializers in this declaration command. tree_decl_init_list *m_init_list; }; OCTAVE_END_NAMESPACE(octave) #endif