Add RbConstGetAt

README.md

@@ -122,7 +122,7 @@ ref. https://docs.ruby-lang.org/ja/latest/function/index.html
 * [x] `rb_const_defined`
 * [ ] `rb_const_defined_at`
 * [x] `rb_const_get`
-* [ ] `rb_const_get_at`
+* [x] `rb_const_get_at`
 * [ ] `rb_const_list`
 * [x] `rb_const_set`
 * [ ] `rb_cont_call`

ruby-internal-intern-variable.go

@@ -34,6 +34,15 @@ func RbConstGet(space VALUE, name ID) VALUE {
 	return VALUE(C.rb_const_get(C.VALUE(space), C.ID(name)))
 }
 
+// RbConstGetAt calls `rb_const_get_at` in C
+//
+// Original definition is following
+//
+//	VALUE rb_const_get_at(VALUE space, ID name)
+func RbConstGetAt(space VALUE, name ID) VALUE {
+	return VALUE(C.rb_const_get_at(C.VALUE(space), C.ID(name)))
+}
+
 // RbConstSet calls `rb_const_set` in C
 //
 // Original definition is following

testdata/dummy/ext/dummy/tests.go

@@ -13,6 +13,7 @@ void  rb_dummy_tests_rb_alias(VALUE self, VALUE dst, VALUE src);
 VALUE rb_dummy_tests_rb_class2name(VALUE self);
 void  rb_dummy_tests_rb_attr(VALUE self, VALUE name, VALUE needReader, VALUE needWriter, VALUE honourVisibility);
 VALUE rb_dummy_tests_rb_const_get(VALUE self, VALUE name);
+VALUE rb_dummy_tests_rb_const_get_at(VALUE self, VALUE name);
 void  rb_dummy_tests_rb_const_set(VALUE self, VALUE name, VALUE val);
 VALUE rb_dummy_tests_rb_const_defined(VALUE self, VALUE name);
 */
@@ -111,6 +112,13 @@ func rb_dummy_tests_rb_const_get(klass C.VALUE, name C.VALUE) C.VALUE {
 	return C.VALUE(ruby.RbConstGet(ruby.VALUE(klass), constID))
 }
 
+//export rb_dummy_tests_rb_const_get_at
+func rb_dummy_tests_rb_const_get_at(klass C.VALUE, name C.VALUE) C.VALUE {
+	constName := ruby.Value2String(ruby.VALUE(name))
+	constID := ruby.RbIntern(constName)
+	return C.VALUE(ruby.RbConstGetAt(ruby.VALUE(klass), constID))
+}
+
 //export rb_dummy_tests_rb_const_set
 func rb_dummy_tests_rb_const_set(klass C.VALUE, name C.VALUE, val C.VALUE) {
 	constName := ruby.Value2String(ruby.VALUE(name))
@@ -147,6 +155,7 @@ func defineMethodsToDummyTests(rb_mDummy ruby.VALUE) {
 	ruby.RbDefineSingletonMethod(rb_cTests, "rb_class2name", C.rb_dummy_tests_rb_class2name, 0)
 	ruby.RbDefineSingletonMethod(rb_cTests, "rb_attr", C.rb_dummy_tests_rb_attr, 4)
 	ruby.RbDefineSingletonMethod(rb_cTests, "rb_const_get", C.rb_dummy_tests_rb_const_get, 1)
+	ruby.RbDefineSingletonMethod(rb_cTests, "rb_const_get_at", C.rb_dummy_tests_rb_const_get_at, 1)
 	ruby.RbDefineSingletonMethod(rb_cTests, "rb_const_set", C.rb_dummy_tests_rb_const_set, 2)
 	ruby.RbDefineSingletonMethod(rb_cTests, "rb_const_defined", C.rb_dummy_tests_rb_const_defined, 1)
 }

testdata/dummy/sig/dummy/tests.rbs

@@ -20,6 +20,7 @@ module Dummy
     def self.rb_class2name: () -> string
     def self.rb_attr: (string name, Integer need_reader, Integer need_writer, Integer honour_visibility) -> void
     def self.rb_const_get: (string name) -> untyped
+    def self.rb_const_get_at: (string name) -> untyped
     def self.rb_const_set: (string name, untyped val) -> void
     def self.rb_const_defined: (string name) -> bool
   end

testdata/dummy/spec/dummy/tests_spec.rb

@@ -133,6 +133,12 @@
     end
   end
 
+  describe ".rb_const_get_at" do
+    it "works" do
+      expect(Dummy::Tests.rb_const_get_at("CONST")).to eq "TEST"
+    end
+  end
+
   describe ".rb_const_set" do
     after do
       silence_warning do