Fix "Use `MRB_SYM()` for error class retrieval"; ref 2ddfd50d

The new macro (`MRB_E_SYM`) was not being used, so it is being used. Also
`MRB_E_SYM` is confusing with `MRB_SYM_E`, so change it to `MRB_ERROR_SYM`.

include/mruby.h

@@ -1303,34 +1303,26 @@ MRB_API mrb_value mrb_vformat(mrb_state *mrb, const char *format, va_list ap);
    + those E_* macros requires mrb_state* variable named mrb.
    + exception objects obtained from those macros are local to mrb
 */
-#ifdef MRB_SYM
-/* mruby/presym.h is included earlier */
-# define MRB_E_SYM(sym) MRB_SYM(sym)
-#else
-# define MRB_E_SYM(sym) mrb_intern_lit(mrb, #sym)
-#endif
-
-#define E_RUNTIME_ERROR      mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "RuntimeError"))
-#define E_TYPE_ERROR         mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "TypeError"))
-#define E_ZERODIV_ERROR      mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "ZeroDivisionError"))
-#define E_ARGUMENT_ERROR     mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "ArgumentError"))
-#define E_INDEX_ERROR        mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "IndexError"))
-#define E_RANGE_ERROR        mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "RangeError"))
-#define E_NAME_ERROR         mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "NameError"))
-#define E_NOMETHOD_ERROR     mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "NoMethodError"))
-#define E_SCRIPT_ERROR       mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "ScriptError"))
-#define E_SYNTAX_ERROR       mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "SyntaxError"))
-#define E_LOCALJUMP_ERROR    mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "LocalJumpError"))
-#define E_REGEXP_ERROR       mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "RegexpError"))
-#define E_FROZEN_ERROR       mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "FrozenError"))
-
-#define E_NOTIMP_ERROR       mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "NotImplementedError"))
+#define MRB_ERROR_SYM(sym) mrb_intern_lit(mrb, #sym)
+#define E_RUNTIME_ERROR      mrb_exc_get_id(mrb, MRB_ERROR_SYM(RuntimeError))
+#define E_TYPE_ERROR         mrb_exc_get_id(mrb, MRB_ERROR_SYM(TypeError))
+#define E_ZERODIV_ERROR      mrb_exc_get_id(mrb, MRB_ERROR_SYM(ZeroDivisionError))
+#define E_ARGUMENT_ERROR     mrb_exc_get_id(mrb, MRB_ERROR_SYM(ArgumentError))
+#define E_INDEX_ERROR        mrb_exc_get_id(mrb, MRB_ERROR_SYM(IndexError))
+#define E_RANGE_ERROR        mrb_exc_get_id(mrb, MRB_ERROR_SYM(RangeError))
+#define E_NAME_ERROR         mrb_exc_get_id(mrb, MRB_ERROR_SYM(NameError))
+#define E_NOMETHOD_ERROR     mrb_exc_get_id(mrb, MRB_ERROR_SYM(NoMethodError))
+#define E_SCRIPT_ERROR       mrb_exc_get_id(mrb, MRB_ERROR_SYM(ScriptError))
+#define E_SYNTAX_ERROR       mrb_exc_get_id(mrb, MRB_ERROR_SYM(SyntaxError))
+#define E_LOCALJUMP_ERROR    mrb_exc_get_id(mrb, MRB_ERROR_SYM(LocalJumpError))
+#define E_REGEXP_ERROR       mrb_exc_get_id(mrb, MRB_ERROR_SYM(RegexpError))
+#define E_FROZEN_ERROR       mrb_exc_get_id(mrb, MRB_ERROR_SYM(FrozenError))
+#define E_NOTIMP_ERROR       mrb_exc_get_id(mrb, MRB_ERROR_SYM(NotImplementedError))
+#define E_KEY_ERROR          mrb_exc_get_id(mrb, MRB_ERROR_SYM(KeyError))
 #ifndef MRB_NO_FLOAT
-#define E_FLOATDOMAIN_ERROR  mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "FloatDomainError"))
+# define E_FLOATDOMAIN_ERROR mrb_exc_get_id(mrb, MRB_ERROR_SYM(FloatDomainError))
 #endif
 
-#define E_KEY_ERROR          mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "KeyError"))
-
 MRB_API mrb_value mrb_yield(mrb_state *mrb, mrb_value b, mrb_value arg);
 MRB_API mrb_value mrb_yield_argv(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value *argv);
 MRB_API mrb_value mrb_yield_with_class(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value *argv, mrb_value self, struct RClass *c);
@@ -1396,7 +1388,7 @@ MRB_API mrb_value mrb_fiber_alive_p(mrb_state *mrb, mrb_value fib);
  *
  * Implemented in mruby-fiber
  */
-#define E_FIBER_ERROR mrb_exc_get_id(mrb, mrb_intern_lit(mrb, "FiberError"))
+#define E_FIBER_ERROR mrb_exc_get_id(mrb, MRB_ERROR_SYM(FiberError))
 MRB_API void mrb_stack_extend(mrb_state*, mrb_int);
 
 /* memory pool implementation */

include/mruby/presym/enable.h

@@ -39,7 +39,7 @@ enum mruby_presym {
   static void init_##name(mrb_state *mrb) {}
 
 /* use MRB_SYM() for E_RUNTIME_ERROR etc. */
-# undef MRB_E_SYM
-# define MRB_E_SYM(sym) MRB_SYM(sym)
+#undef MRB_ERROR_SYM
+#define MRB_ERROR_SYM(sym) MRB_SYM(sym)
 
 #endif  /* MRUBY_PRESYM_ENABLE_H */