parse.y: revert some changes to be compiled by old `bison`.

fed3a7c6 · Yukihiro "Matz" Matsumoto · 63a983c4 · fed3a7c6
Unverified Commit fed3a7c6 authored Jul 29, 2021 by Yukihiro "Matz" Matsumoto
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mrbgems/mruby-compiler/core/parse.y mrbgems/mruby-compiler/core/parse.y +2 -2

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--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -1383,10 +1383,10 @@ heredoc_end(parser_state *p)

 /* xxx ----------------------------- */

+#define YYERROR_VERBOSE 1
 %}

-%define parse.error verbose
-%define api.pure
+%pure-parser
 %parse-param {parser_state *p}
 %lex-param {parser_state *p}