Use `mrb_str_cat_str` instead of `mrb_str_concat` if possible

mrbgems/mruby-string-ext/src/string.c

@@ -174,8 +174,8 @@ mrb_str_concat_m(mrb_state *mrb, mrb_value self)
     str = int_chr_binary(mrb, str);
 #endif
   else
-    str = mrb_ensure_string_type(mrb, str);
-  mrb_str_concat(mrb, self, str);
+    mrb_ensure_string_type(mrb, str);
+  mrb_str_cat_str(mrb, self, str);
   return self;
 }
 

src/class.c

@@ -145,7 +145,7 @@ class_name_str(mrb_state *mrb, struct RClass* c)
   if (mrb_nil_p(path)) {
     path = c->tt == MRB_TT_MODULE ? mrb_str_new_lit(mrb, "#<Module:") :
                                     mrb_str_new_lit(mrb, "#<Class:");
-    mrb_str_concat(mrb, path, mrb_ptr_to_str(mrb, c));
+    mrb_str_cat_str(mrb, path, mrb_ptr_to_str(mrb, c));
     mrb_str_cat_lit(mrb, path, ">");
   }
   return path;

src/object.c

@@ -423,7 +423,7 @@ mrb_any_to_s(mrb_state *mrb, mrb_value obj)
   mrb_str_cat_cstr(mrb, str, cname);
   if (!mrb_immediate_p(obj)) {
     mrb_str_cat_lit(mrb, str, ":");
-    mrb_str_concat(mrb, str, mrb_ptr_to_str(mrb, mrb_ptr(obj)));
+    mrb_str_cat_str(mrb, str, mrb_ptr_to_str(mrb, mrb_ptr(obj)));
   }
   mrb_str_cat_lit(mrb, str, ">");
 

src/variable.c

@@ -509,7 +509,7 @@ mrb_obj_iv_inspect(mrb_state *mrb, struct RObject *obj)
     mrb_str_cat_lit(mrb, str, "-<");
     mrb_str_cat_cstr(mrb, str, cn);
     mrb_str_cat_lit(mrb, str, ":");
-    mrb_str_concat(mrb, str, mrb_ptr_to_str(mrb, obj));
+    mrb_str_cat_str(mrb, str, mrb_ptr_to_str(mrb, obj));
 
     iv_foreach(mrb, t, inspect_i, &str);
     mrb_str_cat_lit(mrb, str, ">");