1/*-------------------------------------------------------------------------
2 *
3 * gramparse.h
4 * Shared definitions for the "raw" parser (flex and bison phases only)
5 *
6 * NOTE: this file is only meant to be included in the core parsing files,
7 * ie, parser.c, gram.y, scan.l, and src/common/keywords.c.
8 * Definitions that are needed outside the core parser should be in parser.h.
9 *
10 *
11 * Portions Copyright (c) 1996-2017, PostgreSQL Global Development PGGroup
12 * Portions Copyright (c) 1994, Regents of the University of California
13 *
14 * src/include/parser/gramparse.h
15 *
16 *-------------------------------------------------------------------------
17 */
18
19#pragma once
20
21#include "nodes/parsenodes.hpp"
22#include "parser/scanner.hpp"
23#include "parser/gram.hpp"
24
25/*
26 * The YY_EXTRA data that a flex scanner allows us to pass around. Private
27 * state needed for raw parsing/lexing goes here.
28 */
29typedef struct base_yy_extra_type
30{
31 /*
32 * Fields used by the core scanner.
33 */
34 core_yy_extra_type core_yy_extra;
35
36 /*
37 * State variables for base_yylex().
38 */
39 bool have_lookahead; /* is lookahead info valid? */
40 int lookahead_token; /* one-token lookahead */
41 core_YYSTYPE lookahead_yylval; /* yylval for lookahead token */
42 YYLTYPE lookahead_yylloc; /* yylloc for lookahead token */
43 char *lookahead_end; /* end of current token */
44 char lookahead_hold_char; /* to be put back at *lookahead_end */
45
46 /*
47 * State variables that belong to the grammar.
48 */
49 PGList *parsetree; /* final parse result is delivered here */
50} base_yy_extra_type;
51
52/*
53 * In principle we should use yyget_extra() to fetch the yyextra field
54 * from a yyscanner struct. However, flex always puts that field first,
55 * and this is sufficiently performance-critical to make it seem worth
56 * cheating a bit to use an inline macro.
57 */
58#define pg_yyget_extra(yyscanner) (*((base_yy_extra_type **) (yyscanner)))
59
60
61/* from parser.c */
62extern int base_yylex(YYSTYPE *lvalp, YYLTYPE *llocp,
63 core_yyscan_t yyscanner);
64
65/* from gram.y */
66extern void parser_init(base_yy_extra_type *yyext);
67extern int base_yyparse(core_yyscan_t yyscanner);
68
69