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/* -*- C++ -*- */
// ========================================================================
// $Id$
//
// = LIBRARY
// orbsvcs
//
// = FILENAME
// Constraint.h
//
// = AUTHOR
// Seth Widoff <sbw1@cs.wustl.edu>
//
// ========================================================================
#ifndef TAO_CONSTRAINT_H
#define TAO_CONSTRAINT_H
#include "Constraint_Nodes.h"
// Functions we need for parsing.
extern int yyparse(void);
extern void yyrestart(FILE*);
extern int yylex(void);
// Have yylex read from the constraint string, not from stdin.
#undef YY_INPUT
#define YY_INPUT(b, r, ms) (r = TAO_Lex_String_Input::copy_into(b, ms))
#undef yyerror
#define yyerror(x)
class TAO_Lex_String_Input
// = TITLE
// Stupid hack to have Lex read from a string and not from
// stdin. Essentially, the interpreter needs to call yylex() until
// EOF, and call TAO_Lex_String_Input::reset() with the new string,
// prior to calling yyparse.
{
public:
static void reset(char* input_string);
// Reset the lex input.
static int copy_into(char* buf, int max_size);
// Method lex will call to read from the input string.
private:
static char* string_;
static char* current_;
static char* end_;
// Pointers to keep track of the input string.
};
// The union used by lex and yacc to build the Abstract Syntax Tree.
typedef union
{
TAO_Constraint* constraint_;
} YYSTYPE;
extern YYSTYPE yylval;
extern YYSTYPE yyval;
#endif /* CONSTRAINT_H */
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