[Bug #21629] Deprecate rb_setup_fake_str

Author: nobu

ext/-test-/string/fstring.c

@@ -8,14 +8,6 @@ bug_s_fstring(VALUE self, VALUE str)
     return rb_str_to_interned_str(str);
 }
 
-VALUE
-bug_s_fstring_fake_str(VALUE self)
-{
-    static const char literal[] = "abcdefghijklmnopqrstuvwxyz";
-    struct RString fake_str;
-    return rb_str_to_interned_str(rb_setup_fake_str(&fake_str, literal, sizeof(literal) - 1, 0));
-}
-
 VALUE
 bug_s_rb_enc_interned_str(VALUE self, VALUE encoding)
 {
@@ -32,7 +24,6 @@ void
 Init_string_fstring(VALUE klass)
 {
     rb_define_singleton_method(klass, "fstring", bug_s_fstring, 1);
-    rb_define_singleton_method(klass, "fstring_fake_str", bug_s_fstring_fake_str, 0);
     rb_define_singleton_method(klass, "rb_enc_interned_str", bug_s_rb_enc_interned_str, 1);
     rb_define_singleton_method(klass, "rb_enc_str_new", bug_s_rb_enc_str_new, 1);
 }

internal/string.h

@@ -80,6 +80,9 @@ RUBY_SYMBOL_EXPORT_BEGIN
 /* string.c (export) */
 VALUE rb_str_tmp_frozen_acquire(VALUE str);
 void rb_str_tmp_frozen_release(VALUE str, VALUE tmp);
+#ifdef RBIMPL_ATTR_DEPRECATED_INTERNAL
+RBIMPL_ATTR_DEPRECATED_INTERNAL(3.5)
+#endif
 VALUE rb_setup_fake_str(struct RString *fake_str, const char *name, long len, rb_encoding *enc);
 RUBY_SYMBOL_EXPORT_END
 

test/-ext-/string/test_fstring.rb

@@ -57,10 +57,6 @@ def test_singleton_class
     assert_raise(TypeError) {fstr.singleton_class}
   end
 
-  def test_fake_str
-    assert_equal([*"a".."z"].join(""), Bug::String.fstring_fake_str)
-  end
-
   class S < String
   end