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LibJS: Implement spec-compliant Object.prototype.toString
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4 changed files with 53 additions and 12 deletions
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@ -68,10 +68,43 @@ JS_DEFINE_NATIVE_FUNCTION(ObjectPrototype::has_own_property)
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JS_DEFINE_NATIVE_FUNCTION(ObjectPrototype::to_string)
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{
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auto* this_object = interpreter.this_value(global_object).to_object(interpreter, global_object);
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auto this_value = interpreter.this_value(global_object);
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if (this_value.is_undefined())
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return js_string(interpreter, "[object Undefined]");
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if (this_value.is_null())
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return js_string(interpreter, "[object Null]");
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auto* this_object = this_value.to_object(interpreter, global_object);
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if (!this_object)
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return {};
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return js_string(interpreter, String::format("[object %s]", this_object->class_name()));
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String tag;
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auto to_string_tag = this_object->get(interpreter.well_known_symbol_to_string_tag());
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if (to_string_tag.is_string()) {
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tag = to_string_tag.as_string().string();
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} else if (this_object->is_array()) {
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tag = "Array";
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} else if (this_object->is_function()) {
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tag = "Function";
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} else if (this_object->is_error()) {
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tag = "Error";
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} else if (this_object->is_boolean_object()) {
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tag = "Boolean";
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} else if (this_object->is_number_object()) {
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tag = "Number";
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} else if (this_object->is_string_object()) {
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tag = "String";
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} else if (this_object->is_date()) {
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tag = "Date";
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} else if (this_object->is_regexp_object()) {
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tag = "RegExp";
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} else {
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tag = "Object";
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}
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return js_string(interpreter, String::format("[object %s]", tag.characters()));
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}
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JS_DEFINE_NATIVE_FUNCTION(ObjectPrototype::to_locale_string)
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@ -64,8 +64,8 @@ public:
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private:
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virtual void visit_children(Visitor&) override;
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virtual bool is_proxy_object() const override { return true; }
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virtual bool is_function() const override { return m_target.is_function(); }
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virtual bool is_function() const override { return m_target.is_function(); }
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virtual bool is_array() const override { return m_target.is_array(); };
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Object& m_target;
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