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LibJS: Implement Error.prototype.toString()
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2636cac6e4
commit
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3 changed files with 39 additions and 0 deletions
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@ -38,6 +38,7 @@ ErrorPrototype::ErrorPrototype()
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{
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put_native_property("name", name_getter, nullptr);
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put_native_property("message", message_getter, nullptr);
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put_native_function("toString", to_string);
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}
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ErrorPrototype::~ErrorPrototype()
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@ -64,4 +65,27 @@ Value ErrorPrototype::message_getter(Interpreter& interpreter)
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return js_string(interpreter.heap(), static_cast<const Error*>(this_object)->message());
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}
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Value ErrorPrototype::to_string(Interpreter& interpreter)
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{
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if (!interpreter.this_value().is_object())
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return interpreter.throw_exception<Error>("TypeError", "Not an object");
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auto& this_object = interpreter.this_value().as_object();
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String name = "Error";
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auto object_name_property = this_object.get("name");
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if (object_name_property.has_value() && !object_name_property.value().is_undefined())
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name = object_name_property.value().to_string();
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String message = "";
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auto object_message_property = this_object.get("message");
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if (object_message_property.has_value() && !object_message_property.value().is_undefined())
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message = object_message_property.value().to_string();
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if (name.length() == 0)
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return js_string(interpreter.heap(), message);
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if (message.length() == 0)
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return js_string(interpreter.heap(), name);
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return js_string(interpreter.heap(), String::format("%s: %s", name.characters(), message.characters()));
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}
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}
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@ -38,6 +38,8 @@ public:
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private:
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virtual const char* class_name() const override { return "ErrorPrototype"; }
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static Value to_string(Interpreter&);
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static Value name_getter(Interpreter&);
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static Value message_getter(Interpreter&);
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};
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