change mrb_sym type from uint16_t to uint32_t

include/mruby.h

@@ -161,7 +161,6 @@ typedef struct mrb_state {
   mrb_bool gc_full:1;
   mrb_bool is_generational_gc_mode:1;
   mrb_bool out_of_memory:1;
-  mrb_bool symbol_table_overflow:1;
   size_t majorgc_old_threshold;
   struct alloca_header *mems;
 

include/mruby/value.h

@@ -7,7 +7,7 @@
 #ifndef MRUBY_VALUE_H
 #define MRUBY_VALUE_H
 
-typedef uint16_t mrb_sym;
+typedef uint32_t mrb_sym;
 typedef uint8_t mrb_bool;
 struct mrb_state;
 

src/symbol.c

@@ -45,14 +45,6 @@ sym_validate_len(mrb_state *mrb, size_t len)
   }
 }
 
-#define MRB_SYM_MAX UINT16_MAX
-
-static mrb_value
-sym_tbl_overflow_new_str(mrb_state *mrb, const char *name, size_t len)
-{
-  return mrb_str_inspect(mrb, mrb_str_new(mrb, name, len));
-}
-
 static mrb_sym
 sym_intern(mrb_state *mrb, const char *name, size_t len, mrb_bool lit)
 {
@@ -70,19 +62,6 @@ sym_intern(mrb_state *mrb, const char *name, size_t len, mrb_bool lit)
   if (k != kh_end(h))
     return kh_value(h, k);
 
-  if (mrb->symbol_table_overflow) {
-    if (mrb->symidx == MRB_SYM_MAX) {
-      mrb_bug(mrb, "symbol table overflow (symbol %S)", sym_tbl_overflow_new_str(mrb, name, len));
-    }
-  }
-  else {
-    if (mrb->symidx >= MRB_SYM_MAX - 8) { /* raising might intern a few new strings */
-      mrb->symbol_table_overflow = TRUE;
-      mrb_raisef(mrb, E_RUNTIME_ERROR, "symbol table overflow (symbol %S)",
-        sym_tbl_overflow_new_str(mrb, name, len));
-    }
-  }
-
   sym = ++mrb->symidx;
   if (lit) {
     sname.name = name;