76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* gramparse.h
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* Shared definitions for the "raw" parser (flex and bison phases only)
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*
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* NOTE: this file is only meant to be included in the core parsing files,
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* i.e., parser.c, gram.y, and scan.l.
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* Definitions that are needed outside the core parser should be in parser.h.
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*
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*
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* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/backend/parser/gramparse.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef GRAMPARSE_H
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#define GRAMPARSE_H
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#include "nodes/parsenodes.h"
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#include "parser/scanner.h"
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/*
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* NB: include gram.h only AFTER including scanner.h, because scanner.h
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* is what #defines YYLTYPE.
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*/
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#include "gram.h"
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/*
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* The YY_EXTRA data that a flex scanner allows us to pass around. Private
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* state needed for raw parsing/lexing goes here.
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*/
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typedef struct base_yy_extra_type
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{
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/*
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* Fields used by the core scanner.
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*/
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core_yy_extra_type core_yy_extra;
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/*
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* State variables for base_yylex().
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*/
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bool have_lookahead; /* is lookahead info valid? */
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int lookahead_token; /* one-token lookahead */
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core_YYSTYPE lookahead_yylval; /* yylval for lookahead token */
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YYLTYPE lookahead_yylloc; /* yylloc for lookahead token */
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char *lookahead_end; /* end of current token */
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char lookahead_hold_char; /* to be put back at *lookahead_end */
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/*
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* State variables that belong to the grammar.
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*/
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List *parsetree; /* final parse result is delivered here */
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} base_yy_extra_type;
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/*
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* In principle we should use yyget_extra() to fetch the yyextra field
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* from a yyscanner struct. However, flex always puts that field first,
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* and this is sufficiently performance-critical to make it seem worth
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* cheating a bit to use an inline macro.
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*/
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#define pg_yyget_extra(yyscanner) (*((base_yy_extra_type **) (yyscanner)))
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/* from parser.c */
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extern int base_yylex(YYSTYPE *lvalp, YYLTYPE *llocp,
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core_yyscan_t yyscanner);
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/* from gram.y */
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extern void parser_init(base_yy_extra_type *yyext);
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extern int base_yyparse(core_yyscan_t yyscanner);
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#endif /* GRAMPARSE_H */
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