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/*-------------------------------------------------------------------------
*
* gramparse.h
* Shared definitions for the "raw" parser (flex and bison phases only)
*
* NOTE: this file is only meant to be included in the core parsing files,
* ie, parser.c, gram.y, scan.l, and src/common/keywords.c.
* Definitions that are needed outside the core parser should be in parser.h.
*
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/parser/gramparse.h
*
*-------------------------------------------------------------------------
*/
#ifndef GRAMPARSE_H
#define GRAMPARSE_H
#include "nodes/parsenodes.h"
#include "parser/scanner.h"
/*
* NB: include gram.h only AFTER including scanner.h, because scanner.h
* is what #defines YYLTYPE.
*/
#include "parser/gram.h"
/*
* The YY_EXTRA data that a flex scanner allows us to pass around. Private
* state needed for raw parsing/lexing goes here.
*/
typedef struct base_yy_extra_type
{
/*
* Fields used by the core scanner.
*/
core_yy_extra_type core_yy_extra;
/*
* State variables for base_yylex().
*/
bool have_lookahead; /* is lookahead info valid? */
int lookahead_token; /* one-token lookahead */
core_YYSTYPE lookahead_yylval; /* yylval for lookahead token */
YYLTYPE lookahead_yylloc; /* yylloc for lookahead token */
char *lookahead_end; /* end of current token */
char lookahead_hold_char; /* to be put back at *lookahead_end */
/*
* State variables that belong to the grammar.
*/
List *parsetree; /* final parse result is delivered here */
} base_yy_extra_type;
/*
* In principle we should use yyget_extra() to fetch the yyextra field
* from a yyscanner struct. However, flex always puts that field first,
* and this is sufficiently performance-critical to make it seem worth
* cheating a bit to use an inline macro.
*/
#define pg_yyget_extra(yyscanner) (*((base_yy_extra_type **) (yyscanner)))
/* from parser.c */
extern int base_yylex(YYSTYPE *lvalp, YYLTYPE *llocp,
core_yyscan_t yyscanner);
/* from gram.y */
extern void parser_init(base_yy_extra_type *yyext);
extern int base_yyparse(core_yyscan_t yyscanner);
#endif /* GRAMPARSE_H */
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