use new mrb_format API from mrb_raisef; its only format specifier is "%S" (stringify) and takes mrb_value; close #1062

1 files changed, 15 insertions, 0 deletions

diff --git a/src/symbol.c b/src/symbol.c
index 37090111a..2612e0d15 100644
--- a/src/symbol.c
+++ b/src/symbol.c
@@ -348,6 +348,21 @@ sym_inspect(mrb_state *mrb, mrb_value sym)
   return str;
 }
 
+mrb_value
+mrb_sym2str(mrb_state *mrb, mrb_sym sym)
+{
+  size_t len;
+  const char *name = mrb_sym2name_len(mrb, sym, &len);
+
+  if (!name) return mrb_undef_value(); /* can't happen */
+  if (symname_p(name) && strlen(name) == len) {
+    return mrb_str_new(mrb, name, len);
+  }
+  else {
+    return mrb_str_dump(mrb, mrb_str_new(mrb, name, len));
+  }
+}
+
 const char*
 mrb_sym2name(mrb_state *mrb, mrb_sym sym)
 {