Merge pull request #5122 from shuujii/change-name-and-usage-of-presym-macros

Change name and usage of presym macros

include/mruby/presym.h

@@ -8,18 +8,37 @@
 #define MRUBY_PRESYM_H
 
 #undef MRB_PRESYM_MAX
-#define MRB_PRESYM_CSYM(sym, num) MRB_PRESYM__##sym = (num<<1),
-#define MRB_PRESYM_QSYM(str, sym, num) MRB_PRESYM_q_##sym = (num<<1),
-#define MRB_PRESYM_SYM(sym, num) 
+#define MRB_PRESYM_NAMED(lit, num, type, name) MRB_##type##__##name = (num<<1),
+#define MRB_PRESYM_UNNAMED(lit, num)
 
 enum mruby_presym {
 #include <../build/presym.inc>
 };
 
-#undef MRB_PRESYM_CSYM
-#undef MRB_PRESYM_QSYM
-#undef MRB_PRESYM_SYM
+#undef MRB_PRESYM_NAMED
+#undef MRB_PRESYM_UNNAMED
+
+/*
+ * For `MRB_OPSYM`, specify the names corresponding to operators (refer to
+ * `op_table` in `Rakefile` for the names that can be specified for it).
+ * Other than that, describe only word characters excluding leading and
+ * ending punctuations.
+ *
+ * Example:
+ *   MRB_OPSYM(and)  //=> &
+ *   MRB_CVSYM(foo)  //=> @@foo
+ *   MRB_IVSYM(foo)  //=> @foo
+ *   MRB_SYM_B(foo)  //=> foo!
+ *   MRB_SYM_Q(foo)  //=> foo?
+ *   MRB_SYM_E(foo)  //=> foo=
+ *   MRB_SYM(foo)    //=> foo
+ */
+#define MRB_OPSYM(name) MRB_OPSYM__##name  /* Operator */
+#define MRB_CVSYM(name) MRB_CVSYM__##name  /* Class Variable */
+#define MRB_IVSYM(name) MRB_IVSYM__##name  /* Instance Variable */
+#define MRB_SYM_B(name) MRB_SYM_B__##name  /* Method with Bang */
+#define MRB_SYM_Q(name) MRB_SYM_Q__##name  /* Method with Question mark */
+#define MRB_SYM_E(name) MRB_SYM_E__##name  /* Method with Equal */
+#define MRB_SYM(name)   MRB_SYM__##name    /* Word characters */
 
-#define MRB_SYM(sym) MRB_PRESYM__##sym
-#define MRB_QSYM(sym) MRB_PRESYM_q_##sym
 #endif  /* MRUBY_PRESYM_H */