b4_pure_if(
[#ifdef YYLEX_PARAM
-# define YYLEX yylex (&yylval, b4_location_if([&yylloc, ])YYLEX_PARAM)
+# define YYLEX yylex (&yylval[]b4_location_if([, &yylloc]), YYLEX_PARAM)
#else
-# define YYLEX yylex (&yylval, b4_location_if([&yylloc, ]))
+# define YYLEX yylex (&yylval[]b4_location_if([, &yylloc]))
#endif],
[#define YYLEX yylex ()])