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%top{
/*-------------------------------------------------------------------------
*
* bootscanner.l
* a lexical scanner for the bootstrap parser
*
* Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/bootstrap/bootscanner.l
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
/*
* NB: include bootparse.h only AFTER including bootstrap.h, because bootstrap.h
* includes node definitions needed for YYSTYPE.
*/
#include "bootstrap/bootstrap.h"
#include "bootparse.h"
#include "utils/guc.h"
}
%{
/* LCOV_EXCL_START */
/* Avoid exit() on fatal scanner errors (a bit ugly -- see yy_fatal_error) */
#undef fprintf
#define fprintf(file, fmt, msg) fprintf_to_ereport(fmt, msg)
static void
fprintf_to_ereport(const char *fmt, const char *msg)
{
ereport(ERROR, (errmsg_internal("%s", msg)));
}
%}
%option reentrant
%option bison-bridge
%option 8bit
%option never-interactive
%option nodefault
%option noinput
%option nounput
%option noyywrap
%option noyyalloc
%option noyyrealloc
%option noyyfree
%option warn
%option prefix="boot_yy"
id [-A-Za-z0-9_]+
sid \'([^']|\'\')*\'
/*
* Keyword tokens return the keyword text (as a constant string) in yylval->kw,
* just in case that's needed because we want to treat the keyword as an
* unreserved identifier. Note that _null_ is not treated as a keyword
* for this purpose; it's the one "reserved word" in the bootstrap syntax.
*
* Notice that all the keywords are case-sensitive, and for historical
* reasons some must be upper case.
*
* String tokens return a palloc'd string in yylval->str.
*/
%%
open { yylval->kw = "open"; return OPEN; }
close { yylval->kw = "close"; return XCLOSE; }
create { yylval->kw = "create"; return XCREATE; }
OID { yylval->kw = "OID"; return OBJ_ID; }
bootstrap { yylval->kw = "bootstrap"; return XBOOTSTRAP; }
shared_relation { yylval->kw = "shared_relation"; return XSHARED_RELATION; }
rowtype_oid { yylval->kw = "rowtype_oid"; return XROWTYPE_OID; }
insert { yylval->kw = "insert"; return INSERT_TUPLE; }
_null_ { return NULLVAL; }
"," { return COMMA; }
"=" { return EQUALS; }
"(" { return LPAREN; }
")" { return RPAREN; }
[\n] { yylineno++; }
[\r\t ] ;
^\#[^\n]* ; /* drop everything after "#" for comments */
declare { yylval->kw = "declare"; return XDECLARE; }
build { yylval->kw = "build"; return XBUILD; }
indices { yylval->kw = "indices"; return INDICES; }
unique { yylval->kw = "unique"; return UNIQUE; }
index { yylval->kw = "index"; return INDEX; }
on { yylval->kw = "on"; return ON; }
using { yylval->kw = "using"; return USING; }
toast { yylval->kw = "toast"; return XTOAST; }
FORCE { yylval->kw = "FORCE"; return XFORCE; }
NOT { yylval->kw = "NOT"; return XNOT; }
NULL { yylval->kw = "NULL"; return XNULL; }
{id} {
yylval->str = pstrdup(yytext);
return ID;
}
{sid} {
/* strip quotes and escapes */
yylval->str = DeescapeQuotedString(yytext);
return ID;
}
. {
elog(ERROR, "syntax error at line %d: unexpected character \"%s\"", yylineno, yytext);
}
%%
/* LCOV_EXCL_STOP */
void
boot_yyerror(yyscan_t yyscanner, const char *message)
{
struct yyguts_t *yyg = (struct yyguts_t *) yyscanner; /* needed for yylineno
* macro */
elog(ERROR, "%s at line %d", message, yylineno);
}
/*
* Interface functions to make flex use palloc() instead of malloc().
* It'd be better to make these static, but flex insists otherwise.
*/
void *
yyalloc(yy_size_t size, yyscan_t yyscanner)
{
return palloc(size);
}
void *
yyrealloc(void *ptr, yy_size_t size, yyscan_t yyscanner)
{
if (ptr)
return repalloc(ptr, size);
else
return palloc(size);
}
void
yyfree(void *ptr, yyscan_t yyscanner)
{
if (ptr)
pfree(ptr);
}
|
