39ed4dd89e
* NEW: Support for custom expression evaluators. [GB.EVAL] * NEW: You can now inheriting the Expression class to create a custom expression evaluator. You have to reimplement three methods: IsSubr(), that returns if a Gambas subroutine is allowed; IsIdentifier() that returns if a specific identifier is known; GetValue() that returns the value of an identifier. All other methods you add to the class become your specific subroutine, provided that you allow it in the IsIdentifier() method. git-svn-id: svn://localhost/gambas/trunk@7545 867c0c6c-44f3-4631-809d-bfa615b0a4ec
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/***************************************************************************
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gbx_expression.h
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(c) 2000-2013 Benoît Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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***************************************************************************/
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#ifndef __GBX_EXPRESSION_H
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#define __GBX_EXPRESSION_H
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#include "gb_table.h"
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#include "gbx_class.h"
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typedef
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struct {
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void *parent;
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char *source;
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int len;
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PATTERN *pattern;
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int pattern_count;
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PATTERN *current;
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PATTERN *tree;
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CLASS exec_class;
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CLASS_LOAD class_load;
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FUNCTION func;
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CLASS_CONST *cst;
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ushort *code;
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ushort ncode;
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ushort ncode_max;
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TABLE *table;
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TABLE *string;
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/*TABLE *variable;*/
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CLASS **class;
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char **unknown;
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int *var;
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short nvar;
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short last_code;
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short last_code2;
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short assign_code;
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int stack_usage;
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void *op;
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char *error;
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unsigned analyze : 1;
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unsigned rewrite : 1;
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unsigned comment : 1;
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unsigned custom : 1;
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//unsigned _reserved : 12;
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}
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//PACKED
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EXPRESSION;
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typedef
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struct {
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SYMBOL sym;
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int local;
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}
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EVAL_SYMBOL;
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#endif
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