function interface to parse Perl statement

yyparse() becomes reentrant.  The yacc stack and related resources
are allocated in yyparse(), rather than in lex_start(), and they are
localised to yyparse(), preserving their values from any outer parser.

yyparse() now takes a parameter which determines which production it
will parse at the top level.  New API function parse_fullstmt() uses this
facility to parse just a single statement.  The top-level single-statement
production that is used for this then messes with the parser's head so
that the parsing stops without seeing EOF, and any lookahead token seen
after the statement is pushed back to the lexer.

1 files changed, 1 insertions, 1 deletions

diff --git a/perl.c b/perl.c
index e0b9fa62ff..a04cfd6302 100644
--- a/perl.c
+++ b/perl.c
@@ -2168,7 +2168,7 @@ S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
     /* now parse the script */
 
     SETERRNO(0,SS_NORMAL);
-    if (yyparse() || PL_parser->error_count) {
+    if (yyparse(GRAMPROG) || PL_parser->error_count) {
 	if (PL_minus_c)
 	    Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
 	else {