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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
commit | 6eb9c5a5657d1fe77b55cc261450f3538d35a94d (patch) | |
tree | 657d8194422a5daccecfd42d654b8a245ef7b4c8 /src/include/parser/gramparse.h | |
parent | Initial commit. (diff) | |
download | postgresql-13-upstream.tar.xz postgresql-13-upstream.zip |
Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/include/parser/gramparse.h')
-rw-r--r-- | src/include/parser/gramparse.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/include/parser/gramparse.h b/src/include/parser/gramparse.h new file mode 100644 index 0000000..7c7be13 --- /dev/null +++ b/src/include/parser/gramparse.h @@ -0,0 +1,75 @@ +/*------------------------------------------------------------------------- + * + * 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 */ |