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Define yycontext before the C header so function definitions can use it.

--- a/compile.c

+++ b/compile.c

@@ -446,7 +446,6 @@

 \n\

 #ifndef YY_PART\n\

 \n\

-typedef struct _yycontext yycontext;\n\

 typedef void (*yyaction)(yycontext *yy, char *yytext, int yyleng);\n\

 typedef struct _yythunk { int begin, end;  yyaction  action;  struct _yythunk *next; } yythunk;\n\

 \n\

@@ -719,6 +718,7 @@

   fprintf(output, "\n");

   fprintf(output, "%s", header);

   fprintf(output, "#define YYRULECOUNT %d\n", ruleCount);

+  fprintf(output, "typedef struct _yycontext yycontext;\n");

 }

 int consumesInput(Node *node)

--- a/minipeg.c

+++ b/minipeg.c

@@ -567,7 +567,6 @@

 \n\

 #ifndef YY_PART\n\

 \n\

-typedef struct _yycontext yycontext;\n\

 typedef void (*yyaction)(yycontext *yy, char *yytext, int yyleng);\n\

 typedef struct _yythunk { int begin, end;  yyaction  action;  struct _yythunk *next; } yythunk;\n\

 \n\

@@ -840,6 +839,7 @@

   fprintf(output, "\n");

   fprintf(output, "%s", header);

   fprintf(output, "#define YYRULECOUNT %d\n", ruleCount);

+  fprintf(output, "typedef struct _yycontext yycontext;\n");

 }

 int consumesInput(Node *node)

@@ -1277,6 +1277,7 @@

 /* Parser generated by minipeg 4e9111b */

 #define YYRULECOUNT 38

+typedef struct _yycontext yycontext;

 #line 1 "peg.peg"

@@ -1374,7 +1375,6 @@

 #ifndef YY_PART

-typedef struct _yycontext yycontext;

 typedef void (*yyaction)(yycontext *yy, char *yytext, int yyleng);

 typedef struct _yythunk { int begin, end;  yyaction  action;  struct _yythunk *next; } yythunk;