-#define parse_type builtin_type (parse_gdbarch)
-#define parse_m2_type builtin_m2_type (parse_gdbarch)
-
-/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
- as well as gratuitiously global symbol names, so we can have multiple
- yacc generated parsers in gdb. Note that these are only the variables
- produced by yacc. If other parser generators (bison, byacc, etc) produce
- additional global names that conflict at link time, then those parser
- generators need to be fixed instead of adding those names to this list. */
-
-#define yymaxdepth m2_maxdepth
-#define yyparse m2_parse
-#define yylex m2_lex
-#define yyerror m2_error
-#define yylval m2_lval
-#define yychar m2_char
-#define yydebug m2_debug
-#define yypact m2_pact
-#define yyr1 m2_r1
-#define yyr2 m2_r2
-#define yydef m2_def
-#define yychk m2_chk
-#define yypgo m2_pgo
-#define yyact m2_act
-#define yyexca m2_exca
-#define yyerrflag m2_errflag
-#define yynerrs m2_nerrs
-#define yyps m2_ps
-#define yypv m2_pv
-#define yys m2_s
-#define yy_yys m2_yys
-#define yystate m2_state
-#define yytmp m2_tmp
-#define yyv m2_v
-#define yy_yyv m2_yyv
-#define yyval m2_val
-#define yylloc m2_lloc
-#define yyreds m2_reds /* With YYDEBUG defined */
-#define yytoks m2_toks /* With YYDEBUG defined */
-#define yyname m2_name /* With YYDEBUG defined */
-#define yyrule m2_rule /* With YYDEBUG defined */
-#define yylhs m2_yylhs
-#define yylen m2_yylen
-#define yydefred m2_yydefred
-#define yydgoto m2_yydgoto
-#define yysindex m2_yysindex
-#define yyrindex m2_yyrindex
-#define yygindex m2_yygindex
-#define yytable m2_yytable
-#define yycheck m2_yycheck
-#define yyss m2_yyss
-#define yysslim m2_yysslim
-#define yyssp m2_yyssp
-#define yystacksize m2_yystacksize
-#define yyvs m2_yyvs
-#define yyvsp m2_yyvsp
-
-#ifndef YYDEBUG
-#define YYDEBUG 1 /* Default to yydebug support */
-#endif
-
-#define YYFPRINTF parser_fprintf
+#define parse_type(ps) builtin_type (ps->gdbarch ())
+#define parse_m2_type(ps) builtin_m2_type (ps->gdbarch ())
+
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
+ etc). */
+#define GDB_YY_REMAP_PREFIX m2_
+#include "yy-remap.h"
+
+/* The state of the parser, used internally when we are parsing the
+ expression. */
+
+static struct parser_state *pstate = NULL;