support returning undefined with identifying by symbol

hmsk · Jun 12, 2024 · fad763a · fad763a
1 parent 29acdc3
commit fad763a
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Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/ext/quickjsrb/quickjsrb.c b/ext/quickjsrb/quickjsrb.c
@@ -1,6 +1,8 @@
 #include "quickjsrb.h"
 
 VALUE rb_mQuickjs;
+VALUE rb_mQuickjsValue;
+const char *undefinedId = "undefined";
 
 VALUE rb_module_eval_js_code(VALUE klass, VALUE r_code)
 {
@@ -37,7 +39,9 @@ VALUE rb_module_eval_js_code(VALUE klass, VALUE r_code)
     result = rb_str_new2(msg);
   } else if (JS_IsBool(res)) {
     result = JS_ToBool(ctx, res) > 0 ? Qtrue : Qfalse;
-  } else if (JS_IsNull(res) || JS_IsUndefined(res)) {
+  } else if (JS_IsUndefined(res)) {
+    result = ID2SYM(rb_intern(undefinedId));
+  } else if (JS_IsNull(res)) {
     result = Qnil;
   } else {
     result = Qnil;
@@ -54,4 +58,7 @@ Init_quickjsrb(void)
 {
   rb_mQuickjs = rb_define_module("Quickjs");
   rb_define_module_function(rb_mQuickjs, "evalCode", rb_module_eval_js_code, 1);
+
+  VALUE valueClass = rb_define_class_under(rb_mQuickjs, "Value", rb_cObject);
+  rb_define_const(valueClass, "UNDEFINED", ID2SYM(rb_intern(undefinedId)));
 }
diff --git a/test/quickjs_test.rb b/test/quickjs_test.rb
@@ -18,6 +18,11 @@ class QuickjsTest < Test::Unit::TestCase
     assert_equal(::Quickjs.evalCode("const func = () => null; func();"), nil)
   end
 
+  test "support returning undefined" do
+    assert_equal(::Quickjs.evalCode("undefined"), Quickjs::Value::UNDEFINED)
+    assert_equal(::Quickjs.evalCode("const obj = {}; obj.key;"), Quickjs::Value::UNDEFINED)
+  end
+
   test "support returning string" do
     assert_equal(::Quickjs.evalCode("'1'"), "1")
     assert_equal(::Quickjs.evalCode("const func = () => 'hello'; func();"), "hello")