internal static JsValue ConvertToJsValue(Literal literal)
{
if (literal.TokenType == TokenType.BooleanLiteral)
{
return(literal.NumericValue > 0.0 ? JsBoolean.True : JsBoolean.False);
}
if (literal.TokenType == TokenType.NullLiteral)
{
return(JsValue.Null);
}
if (literal.TokenType == TokenType.NumericLiteral)
{
var intValue = (int)literal.NumericValue;
return(literal.NumericValue == intValue &&
(intValue != 0 || BitConverter.DoubleToInt64Bits(literal.NumericValue) != JsNumber.NegativeZeroBits)
? JsNumber.Create(intValue)
: JsNumber.Create(literal.NumericValue));
}
if (literal.TokenType == TokenType.StringLiteral)
{
return(JsString.Create((string)literal.Value));
}
return(null);
}
public void ShouldAddModuleFromJsValue()
{
_engine.AddModule("my-module", builder => builder.ExportValue("value", JsString.Create("hello world")));
var ns = _engine.ImportModule("my-module");
Assert.Equal("hello world", ns.Get("value").AsString());
}
public override List <JsValue> GetOwnPropertyKeys(Types types)
{
var properties = new List <JsValue>(_dense?.Length ?? 0 + 1);
if (_dense != null)
{
var length = System.Math.Min(_dense.Length, GetLength());
for (var i = 0; i < length; i++)
{
if (_dense[i] != null)
{
properties.Add(JsString.Create(i));
}
}
}
else
{
foreach (var entry in _sparse)
{
properties.Add(JsString.Create(entry.Key));
}
}
if (_length != null)
{
properties.Add(CommonProperties.Length);
}
properties.AddRange(base.GetOwnPropertyKeys(types));
return(properties);
}
/// <summary>
/// https://tc39.es/ecma262/#sec-string-constructor-string-value
/// </summary>
ObjectInstance IConstructor.Construct(JsValue[] arguments, JsValue newTarget)
{
JsString s;
if (arguments.Length == 0)
{
s = JsString.Empty;
}
else
{
var value = arguments.At(0);
if (newTarget.IsUndefined() && value.IsSymbol())
{
return(StringCreate(JsString.Create(((JsSymbol)value).ToString()), PrototypeObject));
}
s = TypeConverter.ToJsString(arguments[0]);
}
if (newTarget.IsUndefined())
{
return(StringCreate(s, PrototypeObject));
}
return(StringCreate(s, GetPrototypeFromConstructor(newTarget, static intrinsics => intrinsics.String.PrototypeObject)));
}
private JsValue Of(JsValue thisObj, JsValue[] arguments)
{
var len = arguments.Length;
ObjectInstance a;
if (thisObj.IsConstructor)
{
a = ((IConstructor)thisObj).Construct(new JsValue[] { len }, thisObj);
for (uint k = 0; k < arguments.Length; k++)
{
var kValue = arguments[k];
var key = JsString.Create(k);
a.CreateDataPropertyOrThrow(key, kValue);
}
a.Set(CommonProperties.Length, len, true);
}
else
{
// faster for real arrays
ArrayInstance ai;
a = ai = _engine.Array.Construct(len);
for (uint k = 0; k < arguments.Length; k++)
{
var kValue = arguments[k];
ai.SetIndexValue(k, kValue, updateLength: false);
}
ai.SetLength((uint)arguments.Length);
}
return(a);
}
internal static JsString ToJsString(JsValue o)
{
if (o is JsString s)
{
return(s);
}
return(JsString.Create(ToStringNonString(o)));
}
private JsValue AbstractWalkOperation(ObjectInstance thisObject, JsValue prop)
{
JsValue value = thisObject.Get(prop, thisObject);
if (value.IsObject())
{
var valueAsObject = value.AsObject();
if (valueAsObject.Class == ObjectClass.Array)
{
var valAsArray = value.AsArray();
var i = 0;
var arrLen = valAsArray.GetLength();
while (i < arrLen)
{
var newValue = AbstractWalkOperation(valAsArray, JsString.Create(i));
if (newValue.IsUndefined())
{
valAsArray.Delete(JsString.Create(i));
}
else
{
valAsArray.DefineOwnProperty
(
JsString.Create(i),
new PropertyDescriptor
(
value: newValue,
PropertyFlag.ConfigurableEnumerableWritable
));
}
i = i + 1;
}
}
else
{
var keys = valueAsObject.GetOwnProperties();
foreach (var p in keys)
{
var newElement = AbstractWalkOperation(valueAsObject, p.Key);
if (newElement.IsUndefined())
{
valueAsObject.Delete(p.Key);
}
else
{
valueAsObject.DefineOwnProperty(
p.Key,
new PropertyDescriptor
(
value: newElement,
PropertyFlag.ConfigurableEnumerableWritable
));
}
}
}
}
return(_reviver.Invoke(thisObject, new[] { prop, value }));
}
public void ShouldAllowInvokeUserDefinedClass()
{
_engine.AddModule("user", "export class UserDefined { constructor(v) { this._v = v; } hello(c) { return `hello ${this._v}${c}`; } }");
var ctor = _engine.ImportModule("user").Get("UserDefined");
var instance = _engine.Construct(ctor, JsString.Create("world"));
var result = instance.GetMethod("hello").Call(instance, JsString.Create("!"));
Assert.Equal("hello world!", result);
}
public override bool TryGetValue(ulong index, out JsValue value)
{
var propertyName = JsString.Create(index);
var property = _target.GetProperty(propertyName);
var kPresent = property != PropertyDescriptor.Undefined;
value = kPresent ? _target.UnwrapJsValue(property) : JsValue.Undefined;
return(kPresent);
}
private JsValue From(JsValue thisObj, JsValue[] arguments)
{
var source = arguments.At(0);
var mapFunction = arguments.At(1);
var callable = !mapFunction.IsUndefined() ? GetCallable(mapFunction) : null;
var thisArg = arguments.At(2);
if (source.IsNullOrUndefined())
{
ExceptionHelper.ThrowTypeError(_engine, "Cannot convert undefined or null to object");
}
if (source is JsString jsString)
{
var a = _engine.Array.ConstructFast((uint)jsString.Length);
for (int i = 0; i < jsString._value.Length; i++)
{
a.SetIndexValue((uint)i, JsString.Create(jsString._value[i]), updateLength: false);
}
return(a);
}
if (thisObj.IsNull() || !(source is ObjectInstance objectInstance))
{
return(_engine.Array.ConstructFast(0));
}
if (objectInstance is IObjectWrapper wrapper && wrapper.Target is IEnumerable enumerable)
{
return(ConstructArrayFromIEnumerable(enumerable));
}
if (objectInstance.IsArrayLike)
{
return(ConstructArrayFromArrayLike(thisObj, objectInstance, callable, thisArg));
}
ObjectInstance instance;
if (thisObj is IConstructor constructor)
{
instance = constructor.Construct(System.Array.Empty <JsValue>(), thisObj);
}
else
{
instance = _engine.Array.ConstructFast(0);
}
if (objectInstance.TryGetIterator(_engine, out var iterator))
{
var protocol = new ArrayProtocol(_engine, thisArg, instance, iterator, callable);
protocol.Execute();
}
return(instance);
}
private PropertyDescriptor GetProperty(uint index)
{
var prop = GetOwnProperty(index);
if (prop != PropertyDescriptor.Undefined)
{
return(prop);
}
return(Prototype?.GetProperty(JsString.Create(index)) ?? PropertyDescriptor.Undefined);
}
protected override void Initialize()
{
_canReturnToPool = false;
var args = _args;
DefinePropertyOrThrow(CommonProperties.Length, new PropertyDescriptor(_args.Length, PropertyFlag.NonEnumerable));
if (_func is null)
{
// unmapped
ParameterMap = null;
for (uint i = 0; i < (uint)args.Length; i++)
{
var val = args[i];
CreateDataProperty(JsString.Create(i), val);
}
DefinePropertyOrThrow(CommonProperties.Callee, new GetSetPropertyDescriptor.ThrowerPropertyDescriptor(_engine, PropertyFlag.CustomJsValue));
}
else
{
ObjectInstance map = null;
if (args.Length > 0)
{
var mappedNamed = _mappedNamed.Value;
mappedNamed.Clear();
map = Engine.Realm.Intrinsics.Object.Construct(Arguments.Empty);
for (uint i = 0; i < (uint)args.Length; i++)
{
SetOwnProperty(JsString.Create(i), new PropertyDescriptor(args[i], PropertyFlag.ConfigurableEnumerableWritable));
if (i < _names.Length)
{
var name = _names[i];
if (mappedNamed.Add(name))
{
map.SetOwnProperty(JsString.Create(i), new ClrAccessDescriptor(_env, Engine, name));
}
}
}
}
ParameterMap = map;
// step 13
DefinePropertyOrThrow(CommonProperties.Callee, new PropertyDescriptor(_func, PropertyFlag.NonEnumerable));
}
var iteratorFunction = new ClrFunctionInstance(Engine, "iterator", _engine.Realm.Intrinsics.Array.PrototypeObject.Values, 0, PropertyFlag.Configurable);
DefinePropertyOrThrow(GlobalSymbolRegistry.Iterator, new PropertyDescriptor(iteratorFunction, PropertyFlag.Writable | PropertyFlag.Configurable));
}
private static JsValue FromCharCode(JsValue thisObj, JsValue[] arguments)
{
var chars = new char[arguments.Length];
for (var i = 0; i < chars.Length; i++)
{
chars[i] = (char)TypeConverter.ToUint16(arguments[i]);
}
return(JsString.Create(new string(chars)));
}
internal JsValue Get(uint index)
{
var prop = GetOwnProperty(index);
if (prop == PropertyDescriptor.Undefined)
{
prop = Prototype?.GetProperty(JsString.Create(index)) ?? PropertyDescriptor.Undefined;
}
return(UnwrapJsValue(prop));
}
public bool TryGetValue(uint index, out JsValue value)
{
value = Undefined;
if (!TryGetDescriptor(index, out var desc))
{
desc = GetProperty(JsString.Create(index));
}
return(desc.TryGetValue(this, out value));
}
protected internal override JsValue Call(JsValue thisObject, JsValue[] arguments)
{
if (arguments.Length == 0)
{
return(JsString.Empty);
}
var arg = arguments[0];
var str = arg is JsSymbol s
? s.ToString()
: TypeConverter.ToString(arg);
return(JsString.Create(str));
}
public override List <JsValue> GetOwnPropertyKeys(Types types)
{
var keys = new List <JsValue>(PrimitiveValue.Length + 1);
for (uint i = 0; i < PrimitiveValue.Length; ++i)
{
keys.Add(JsString.Create(i));
}
keys.AddRange(base.GetOwnPropertyKeys(types));
keys.Sort((v1, v2) => TypeConverter.ToNumber(v1).CompareTo(TypeConverter.ToNumber(v2)));
keys.Add(JsString.LengthString);
return(keys);
}
private JsString BuildString(EvaluationContext context)
{
using var sb = StringBuilderPool.Rent();
for (var i = 0; i < _templateLiteralExpression.Quasis.Count; i++)
{
var quasi = _templateLiteralExpression.Quasis[i];
sb.Builder.Append(quasi.Value.Cooked);
if (i < _expressions.Length)
{
var completion = _expressions[i].GetValue(context);
sb.Builder.Append(completion.Value);
}
}
return(JsString.Create(sb.ToString()));
}
private JsString BuildString()
{
using (var sb = StringBuilderPool.Rent())
{
for (var i = 0; i < _templateLiteralExpression.Quasis.Count; i++)
{
var quasi = _templateLiteralExpression.Quasis[i];
sb.Builder.Append(quasi.Value.Cooked);
if (i < _expressions.Length)
{
sb.Builder.Append(_expressions[i].GetValue());
}
}
return(JsString.Create(sb.ToString()));
}
}
protected override object EvaluateInternal()
{
var left = _left.GetValue();
var right = _right.GetValue();
if (AreIntegerOperands(left, right))
{
return(JsNumber.Create(left.AsInteger() + right.AsInteger()));
}
var lprim = TypeConverter.ToPrimitive(left);
var rprim = TypeConverter.ToPrimitive(right);
return(lprim.IsString() || rprim.IsString()
? (JsValue)JsString.Create(TypeConverter.ToString(lprim) + TypeConverter.ToString(rprim))
: JsNumber.Create(TypeConverter.ToNumber(lprim) + TypeConverter.ToNumber(rprim)));
}
private static JsValue InternalizeJSONProperty(JsValue holder, JsValue name, ICallable reviver)
{
JsValue temp = holder.Get(name, holder);
if (temp is ObjectInstance val)
{
if (val.IsArray())
{
var i = 0UL;
var len = TypeConverter.ToLength(val.Get(CommonProperties.Length));
while (i < len)
{
var prop = JsString.Create(i);
var newElement = InternalizeJSONProperty(val, prop, reviver);
if (newElement.IsUndefined())
{
val.Delete(prop);
}
else
{
val.CreateDataProperty(prop, newElement);
}
i = i + 1;
}
}
else
{
var keys = val.EnumerableOwnPropertyNames(EnumerableOwnPropertyNamesKind.Key);
foreach (var p in keys)
{
var newElement = InternalizeJSONProperty(val, p, reviver);
if (newElement.IsUndefined())
{
val.Delete(p);
}
else
{
val.CreateDataProperty(p, newElement);
}
}
}
}
return(reviver.Call(holder, new[] { name, temp }));
}
/// <summary>
/// https://tc39.es/ecma262/#sec-string.fromcharcode
/// </summary>
private static JsValue FromCharCode(JsValue thisObj, JsValue[] arguments)
{
var length = arguments.Length;
if (length == 0)
{
return(JsString.Empty);
}
var elements = new char[length];
for (var i = 0; i < elements.Length; i++)
{
var nextCu = TypeConverter.ToUint16(arguments[i]);
elements[i] = (char)nextCu;
}
return(JsString.Create(new string(elements)));
}
private JsValue Slice(JsValue thisObj, JsValue[] arguments)
{
TypeConverter.CheckObjectCoercible(Engine, thisObj);
var start = TypeConverter.ToNumber(arguments.At(0));
if (double.IsNegativeInfinity(start))
{
start = 0;
}
if (double.IsPositiveInfinity(start))
{
return(JsString.Empty);
}
var s = TypeConverter.ToString(thisObj);
var end = TypeConverter.ToNumber(arguments.At(1));
if (double.IsPositiveInfinity(end))
{
end = s.Length;
}
var len = s.Length;
var intStart = (int)start;
var intEnd = arguments.At(1).IsUndefined() ? len : (int)TypeConverter.ToInteger(end);
var from = intStart < 0 ? System.Math.Max(len + intStart, 0) : System.Math.Min(intStart, len);
var to = intEnd < 0 ? System.Math.Max(len + intEnd, 0) : System.Math.Min(intEnd, len);
var span = System.Math.Max(to - from, 0);
if (span == 0)
{
return(JsString.Empty);
}
if (span == 1)
{
return(JsString.Create(s[from]));
}
return(new JsString(s.Substring(from, span)));
}
private JsValue Substring(JsValue thisObj, JsValue[] arguments)
{
TypeConverter.CheckObjectCoercible(Engine, thisObj);
var s = TypeConverter.ToString(thisObj);
var start = TypeConverter.ToNumber(arguments.At(0));
var end = TypeConverter.ToNumber(arguments.At(1));
if (double.IsNaN(start) || start < 0)
{
start = 0;
}
if (double.IsNaN(end) || end < 0)
{
end = 0;
}
var len = s.Length;
var intStart = ToIntegerSupportInfinity(start);
var intEnd = arguments.At(1).IsUndefined() ? len : ToIntegerSupportInfinity(end);
var finalStart = System.Math.Min(len, System.Math.Max(intStart, 0));
var finalEnd = System.Math.Min(len, System.Math.Max(intEnd, 0));
// Swap value if finalStart < finalEnd
var from = System.Math.Min(finalStart, finalEnd);
var to = System.Math.Max(finalStart, finalEnd);
var length = to - from;
if (length == 0)
{
return(JsString.Empty);
}
if (length == 1)
{
return(JsString.Create(s[from]));
}
return(new JsString(s.Substring(from, length)));
}
private IEnumerable <JsValue> EnumerateOwnPropertyKeys(Types types)
{
var basePropertyKeys = base.GetOwnPropertyKeys(types);
// prefer object order, add possible other properties after
var processed = basePropertyKeys.Count > 0 ? new HashSet <JsValue>() : null;
var includeStrings = (types & Types.String) != 0;
if (Target is IDictionary dictionary && includeStrings)
{
// we take values exposed as dictionary keys only
foreach (var key in dictionary.Keys)
{
if (_engine.ClrTypeConverter.TryConvert(key, typeof(string), CultureInfo.InvariantCulture, out var stringKey))
{
var jsString = JsString.Create((string)stringKey);
processed?.Add(jsString);
yield return(jsString);
}
}
}
public object Apply(JsValue thisObject, JsValue[] arguments)
{
if (arguments.Length != 2)
{
ExceptionHelper.ThrowArgumentException("Apply has to be called with two arguments.");
}
var func = thisObject.TryCast <ICallable>();
var thisArg = arguments[0];
var argArray = arguments[1];
if (func is null)
{
return(ExceptionHelper.ThrowTypeError <object>(Engine));
}
if (argArray.IsNullOrUndefined())
{
return(func.Call(thisArg, Arguments.Empty));
}
var argArrayObj = argArray.TryCast <ObjectInstance>();
if (ReferenceEquals(argArrayObj, null))
{
ExceptionHelper.ThrowTypeError(Engine);
}
var len = argArrayObj.Get(CommonProperties.Length, argArrayObj);
var n = TypeConverter.ToUint32(len);
var argList = new JsValue[n];
for (var index = 0; index < n; index++)
{
var indexName = TypeConverter.ToString(index);
var nextArg = argArrayObj.Get(JsString.Create(indexName), argArrayObj);
argList[index] = nextArg;
}
return(func.Call(thisArg, argList));
}
private JsValue Of(JsValue thisObj, JsValue[] arguments)
{
var len = arguments.Length;
ObjectInstance a;
if (thisObj.IsConstructor)
{
a = ((IConstructor)thisObj).Construct(new JsValue[] { len }, thisObj);
}
else
{
a = _realm.Intrinsics.Array.Construct(len);
}
if (a is ArrayInstance ai)
{
// faster for real arrays
for (uint k = 0; k < arguments.Length; k++)
{
var kValue = arguments[k];
ai.SetIndexValue(k, kValue, updateLength: k == arguments.Length - 1);
}
}
else
{
// slower version
for (uint k = 0; k < arguments.Length; k++)
{
var kValue = arguments[k];
var key = JsString.Create(k);
a.CreateDataPropertyOrThrow(key, kValue);
}
a.Set(CommonProperties.Length, len, true);
}
return(a);
}
protected override ExpressionResult EvaluateInternal(EvaluationContext context)
{
var left = _left.GetValue(context).Value;
var right = _right.GetValue(context).Value;
if (context.OperatorOverloadingAllowed &&
TryOperatorOverloading(context, left, right, "op_Addition", out var opResult))
{
return(NormalCompletion(JsValue.FromObject(context.Engine, opResult)));
}
if (AreIntegerOperands(left, right))
{
return(NormalCompletion(JsNumber.Create((long)left.AsInteger() + right.AsInteger())));
}
var lprim = TypeConverter.ToPrimitive(left);
var rprim = TypeConverter.ToPrimitive(right);
JsValue result;
if (lprim.IsString() || rprim.IsString())
{
result = JsString.Create(TypeConverter.ToString(lprim) + TypeConverter.ToString(rprim));
}
else if (AreNonBigIntOperands(left, right))
{
result = JsNumber.Create(TypeConverter.ToNumber(lprim) + TypeConverter.ToNumber(rprim));
}
else
{
AssertValidBigIntArithmeticOperands(context, lprim, rprim);
result = JsBigInt.Create(TypeConverter.ToBigInt(lprim) + TypeConverter.ToBigInt(rprim));
}
return(NormalCompletion(result));
}
public StringInstance Construct(string value)
{
return(Construct(JsString.Create(value)));
}
public BindingName(string value)
{
Key = (Key)value;
StringValue = JsString.Create(value);
}