Merge pull request #90 from sue445/rb_eval_string

Add RbEvalString

Author: sue445

README.md

@@ -227,7 +227,7 @@ ref. https://docs.ruby-lang.org/ja/latest/function/index.html
 * [ ] `rb_equal`
 * [ ] `rb_eval`
 * [ ] `rb_eval_cmd`
-* [ ] `rb_eval_string`
+* [x] `rb_eval_string`
 * [ ] `rb_eval_string_protect`
 * [ ] `rb_eval_string_wrap`
 * [ ] `rb_exc_fatal`

ruby-internal-eval.go

@@ -34,3 +34,15 @@ func RbFuncallvPublic(recv VALUE, mid ID, argc int, argv []VALUE) VALUE {
 func RbFuncall3(recv VALUE, mid ID, argc int, argv []VALUE) VALUE {
 	return RbFuncallvPublic(recv, mid, argc, argv)
 }
+
+// RbEvalString calls `rb_eval_string` in C
+//
+// Original definition is following
+//
+//	VALUE rb_eval_string(const char *str)
+func RbEvalString(str string) VALUE {
+	char, clean := string2Char(str)
+	defer clean()
+
+	return VALUE(C.rb_eval_string(char))
+}

testdata/dummy/ext/dummy/tests.go

@@ -17,6 +17,7 @@ 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);
 VALUE rb_dummy_tests_rb_const_defined_at(VALUE self, VALUE name);
+VALUE rb_dummy_tests_rb_eval_string(VALUE self, VALUE str);
 */
 import "C"
 
@@ -154,6 +155,14 @@ func rb_dummy_tests_rb_const_defined_at(klass C.VALUE, name C.VALUE) C.VALUE {
 	return C.VALUE(ruby.Qfalse())
 }
 
+//export rb_dummy_tests_rb_eval_string
+func rb_dummy_tests_rb_eval_string(_ C.VALUE, str C.VALUE) C.VALUE {
+	goStr := ruby.Value2String(ruby.VALUE(str))
+	ret := ruby.RbEvalString(goStr)
+
+	return C.VALUE(ret)
+}
+
 // defineMethodsToDummyTests define methods in Dummy::Tests
 func defineMethodsToDummyTests(rb_mDummy ruby.VALUE) {
 	rb_cTests := ruby.RbDefineClassUnder(rb_mDummy, "Tests", ruby.VALUE(C.rb_cObject))
@@ -173,4 +182,5 @@ func defineMethodsToDummyTests(rb_mDummy ruby.VALUE) {
 	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)
 	ruby.RbDefineSingletonMethod(rb_cTests, "rb_const_defined_at", C.rb_dummy_tests_rb_const_defined_at, 1)
+	ruby.RbDefineSingletonMethod(rb_cTests, "rb_eval_string", C.rb_dummy_tests_rb_eval_string, 1)
 }

testdata/dummy/sig/dummy/tests.rbs

@@ -24,5 +24,6 @@ module Dummy
     def self.rb_const_set: (string name, untyped val) -> void
     def self.rb_const_defined: (string name) -> bool
     def self.rb_const_defined_at: (string name) -> bool
+    def self.rb_eval_string: (string str) -> untyped
   end
 end

testdata/dummy/spec/dummy/tests_spec.rb

@@ -182,4 +182,10 @@
       end
     end
   end
+
+  describe ".rb_eval_string" do
+    it "works" do
+      expect(Dummy::Tests.rb_eval_string("1 + 2")).to eq 3
+    end
+  end
 end