Fixed name and length properties in global objects

boa/src/builtins/array/mod.rs

@@ -978,7 +978,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(slice, named "slice", with length 2, of prototype);
     make_builtin_fn!(some, named "some", with length 2, of prototype);
 
-    let array = make_constructor_fn(make_array, global, prototype, true);
+    let array = make_constructor_fn("Array", 1, make_array, global, prototype, true);
 
     // Static Methods
     make_builtin_fn!(is_array, named "isArray", with length 1, of array);

boa/src/builtins/bigint/mod.rs

@@ -96,7 +96,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(to_string, named "toString", with length 1, of prototype);
     make_builtin_fn!(value_of, named "valueOf", of prototype);
 
-    make_constructor_fn(make_bigint, global, prototype, false)
+    make_constructor_fn("BigInt", 1, make_bigint, global, prototype, false)
 }
 
 /// Initialise the `BigInt` object on the global object.

boa/src/builtins/boolean/mod.rs

@@ -104,7 +104,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(to_string, named "toString", of prototype);
     make_builtin_fn!(value_of, named "valueOf", of prototype);
 
-    make_constructor_fn(construct_boolean, global, prototype, true)
+    make_constructor_fn("Boolean", 1, construct_boolean, global, prototype, true)
 }
 
 /// Initialise the `Boolean` object on the global object.

boa/src/builtins/error.rs

@@ -60,7 +60,7 @@ pub fn create(global: &Value) -> Value {
     prototype.set_field_slice("name", Value::from("Error"));
     make_builtin_fn!(to_string, named "toString", of prototype);
 
-    make_constructor_fn(make_error, global, prototype, true)
+    make_constructor_fn("Error", 1, make_error, global, prototype, true)
 }
 
 /// Initialise the global object with the `Error` object.

boa/src/builtins/function/mod.rs

@@ -272,7 +272,7 @@ impl Function {
                 }
             }
         } else {
-            let name = this_obj.get_field_slice("name").to_string();
+            let name = this.get_field_slice("name").to_string();
             panic!("TypeError: {} is not a constructor", name);
         }
     }
@@ -338,16 +338,6 @@ impl Debug for Function {
     }
 }
 
-/// Function Prototype.
-///
-/// <https://tc39.es/ecma262/#sec-properties-of-the-function-prototype-object>
-pub fn create_function_prototype() {
-    let mut function_prototype: Object = Object::default();
-    // Set Kind to function (for historical & compatibility reasons)
-    // <https://tc39.es/ecma262/#sec-properties-of-the-function-prototype-object>
-    function_prototype.kind = ObjectKind::Function;
-}
-
 /// Arguments.
 ///
 /// <https://tc39.es/ecma262/#sec-createunmappedargumentsobject>
@@ -388,14 +378,16 @@ pub fn make_function(this: &mut Value, _: &[Value], _: &mut Interpreter) -> Resu
 pub fn create(global: &Value) -> Value {
     let prototype = Value::new_object(Some(global));
 
-    make_constructor_fn(make_function, global, prototype, true)
+    make_constructor_fn("Function", 1, make_function, global, prototype, true)
 }
 
 /// Creates a new constructor function
 ///
 /// This utility function handling linking the new Constructor to the prototype.
 /// So far this is only used by internal functions
 pub fn make_constructor_fn(
+    name: &str,
+    length: i32,
     body: NativeFunctionData,
     global: &Value,
     proto: Value,
@@ -422,6 +414,20 @@ pub fn make_constructor_fn(
     proto.set_field_slice("constructor", constructor_val.clone());
     constructor_val.set_field_slice(PROTOTYPE, proto);
 
+    let length = Property::new()
+        .value(Value::from(length))
+        .writable(false)
+        .configurable(false)
+        .enumerable(false);
+    constructor_val.set_property_slice("length", length);
+
+    let name = Property::new()
+        .value(Value::from(name))
+        .writable(false)
+        .configurable(false)
+        .enumerable(false);
+    constructor_val.set_property_slice("name", name);
+
     constructor_val
 }
 

boa/src/builtins/number/mod.rs

@@ -366,7 +366,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(to_string, named "toString", with length 1, of prototype);
     make_builtin_fn!(value_of, named "valueOf", of prototype);
 
-    make_constructor_fn(make_number, global, prototype, true)
+    make_constructor_fn("Number", 1, make_number, global, prototype, true)
 }
 
 /// Initialise the `Number` object on the global object.

boa/src/builtins/object/mod.rs

@@ -620,7 +620,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(has_own_property, named "hasOwnProperty", of prototype);
     make_builtin_fn!(to_string, named "toString", of prototype);
 
-    let object = make_constructor_fn(make_object, global, prototype, true);
+    let object = make_constructor_fn("Object", 1, make_object, global, prototype, true);
 
     object.set_field_slice("length", Value::from(1));
     make_builtin_fn!(set_prototype_of, named "setPrototypeOf", with length 2, of object);

boa/src/builtins/regexp/mod.rs

@@ -476,7 +476,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(get_sticky, named "sticky", of prototype);
     make_builtin_fn!(get_unicode, named "unicode", of prototype);
 
-    make_constructor_fn(make_regexp, global, prototype, true)
+    make_constructor_fn("RegExp", 1, make_regexp, global, prototype, true)
 }
 
 /// Initialise the `RegExp` object on the global object.

boa/src/builtins/string/mod.rs

@@ -1021,7 +1021,7 @@ pub fn create(global: &Value) -> Value {
     make_builtin_fn!(match_all, named "matchAll", with length 1, of prototype);
     make_builtin_fn!(replace, named "replace", with length 2, of prototype);
 
-    make_constructor_fn(make_string, global, prototype, true)
+    make_constructor_fn("String", 1, make_string, global, prototype, true)
 }
 
 /// Initialise the `String` object on the global object.

boa/src/builtins/symbol/mod.rs

@@ -94,7 +94,7 @@ pub fn create(global: &Value) -> Value {
     let prototype = Value::new_object(Some(global));
     make_builtin_fn!(to_string, named "toString", of prototype);
 
-    make_constructor_fn(call_symbol, global, prototype, false)
+    make_constructor_fn("Symbol", 1, call_symbol, global, prototype, false)
 }
 
 /// Initialise the `Symbol` object on the global object.