128 lines
3.2 KiB
Plaintext
128 lines
3.2 KiB
Plaintext
%{
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/*-------------------------------------------------------------------------
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*
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* bootscanner.l
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* a lexical scanner for the bootstrap parser
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*
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* Portions Copyright (c) 1996-2020, 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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*
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* IDENTIFICATION
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* src/backend/bootstrap/bootscanner.l
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "bootstrap/bootstrap.h"
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#include "utils/guc.h"
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/* Not needed now that this file is compiled as part of bootparse. */
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/* #include "bootparse.h" */
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/* LCOV_EXCL_START */
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/* Avoid exit() on fatal scanner errors (a bit ugly -- see yy_fatal_error) */
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#undef fprintf
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#define fprintf(file, fmt, msg) fprintf_to_ereport(fmt, msg)
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static void
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fprintf_to_ereport(const char *fmt, const char *msg)
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{
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ereport(ERROR, (errmsg_internal("%s", msg)));
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}
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static int yyline = 1; /* line number for error reporting */
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%}
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%option 8bit
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%option never-interactive
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%option nodefault
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%option noinput
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%option nounput
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%option noyywrap
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%option warn
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%option prefix="boot_yy"
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id [-A-Za-z0-9_]+
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sid \'([^']|\'\')*\'
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/*
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* Keyword tokens return the keyword text (as a constant string) in yylval.kw,
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* just in case that's needed because we want to treat the keyword as an
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* unreserved identifier. Note that _null_ is not treated as a keyword
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* for this purpose; it's the one "reserved word" in the bootstrap syntax.
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*
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* Notice that all the keywords are case-sensitive, and for historical
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* reasons some must be upper case.
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*
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* String tokens return a palloc'd string in yylval.str.
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*/
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%%
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open { yylval.kw = "open"; return OPEN; }
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close { yylval.kw = "close"; return XCLOSE; }
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create { yylval.kw = "create"; return XCREATE; }
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OID { yylval.kw = "OID"; return OBJ_ID; }
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bootstrap { yylval.kw = "bootstrap"; return XBOOTSTRAP; }
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shared_relation { yylval.kw = "shared_relation"; return XSHARED_RELATION; }
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rowtype_oid { yylval.kw = "rowtype_oid"; return XROWTYPE_OID; }
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insert { yylval.kw = "insert"; return INSERT_TUPLE; }
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_null_ { return NULLVAL; }
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"," { return COMMA; }
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"=" { return EQUALS; }
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"(" { return LPAREN; }
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")" { return RPAREN; }
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[\n] { yyline++; }
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[\r\t ] ;
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^\#[^\n]* ; /* drop everything after "#" for comments */
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declare { yylval.kw = "declare"; return XDECLARE; }
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build { yylval.kw = "build"; return XBUILD; }
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indices { yylval.kw = "indices"; return INDICES; }
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unique { yylval.kw = "unique"; return UNIQUE; }
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index { yylval.kw = "index"; return INDEX; }
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on { yylval.kw = "on"; return ON; }
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using { yylval.kw = "using"; return USING; }
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toast { yylval.kw = "toast"; return XTOAST; }
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FORCE { yylval.kw = "FORCE"; return XFORCE; }
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NOT { yylval.kw = "NOT"; return XNOT; }
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NULL { yylval.kw = "NULL"; return XNULL; }
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{id} {
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yylval.str = pstrdup(yytext);
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return ID;
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}
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{sid} {
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/* strip quotes and escapes */
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yylval.str = DeescapeQuotedString(yytext);
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return ID;
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}
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. {
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elog(ERROR, "syntax error at line %d: unexpected character \"%s\"", yyline, yytext);
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}
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%%
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/* LCOV_EXCL_STOP */
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void
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yyerror(const char *message)
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{
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elog(ERROR, "%s at line %d", message, yyline);
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}
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