1 /*-------------------------------------------------------------------------
4 * Shared definitions for the "raw" parser (flex and bison phases only)
6 * NOTE: this file is only meant to be included in the core parsing files,
7 * ie, parser.c, gram.y, scan.l, and keywords.c. Definitions that are needed
8 * outside the core parser should be in parser.h.
11 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
12 * Portions Copyright (c) 1994, Regents of the University of California
14 * src/include/parser/gramparse.h
16 *-------------------------------------------------------------------------
22 #include "nodes/parsenodes.h"
23 #include "parser/scanner.h"
26 * NB: include gram.h only AFTER including scanner.h, because scanner.h
27 * is what #defines YYLTYPE.
29 #include "parser/gram.h"
32 * The YY_EXTRA data that a flex scanner allows us to pass around. Private
33 * state needed for raw parsing/lexing goes here.
35 typedef struct base_yy_extra_type
38 * Fields used by the core scanner.
40 core_yy_extra_type core_yy_extra;
43 * State variables for base_yylex().
45 bool have_lookahead; /* is lookahead info valid? */
46 int lookahead_token; /* one-token lookahead */
47 core_YYSTYPE lookahead_yylval; /* yylval for lookahead token */
48 YYLTYPE lookahead_yylloc; /* yylloc for lookahead token */
51 * State variables that belong to the grammar.
53 List *parsetree; /* final parse result is delivered here */
57 * In principle we should use yyget_extra() to fetch the yyextra field
58 * from a yyscanner struct. However, flex always puts that field first,
59 * and this is sufficiently performance-critical to make it seem worth
60 * cheating a bit to use an inline macro.
62 #define pg_yyget_extra(yyscanner) (*((base_yy_extra_type **) (yyscanner)))
66 extern int base_yylex(YYSTYPE *lvalp, YYLTYPE *llocp,
67 core_yyscan_t yyscanner);
70 extern void parser_init(base_yy_extra_type *yyext);
71 extern int base_yyparse(core_yyscan_t yyscanner);
73 #endif /* GRAMPARSE_H */