Reduce instruction size

include/mruby/symbol.h

@@ -0,0 +1,32 @@
+/*
+** mruby/symbol.h - symbol utilities
+**
+** See Copyright Notice in mruby.h
+*/
+
+#ifndef MRUBY_SYMBOL_H
+#define MRUBY_SYMBOL_H
+
+#include "common.h"
+
+/**
+ * Symbol utilities
+ */
+MRB_BEGIN_DECL
+
+typedef enum mrb_reserved_symbol {
+  mrb_sym_add = 1, // +
+  mrb_sym_sub = 2, // -
+  mrb_sym_mul = 3, // *
+  mrb_sym_div = 4, // /
+  mrb_sym_eq = 5, // ==
+  mrb_sym_lt = 6, // <
+  mrb_sym_le = 7, // <=
+  mrb_sym_gt = 8, // >
+  mrb_sym_ge = 9, // >=
+  mrb_sym_method_missing = 10, // method_missing
+} mrb_reserved_symbol;
+
+MRB_END_DECL
+
+#endif  /* MRUBY_SYMBOL_H */