public static Completion min(IValue @this, IReadOnlyList <IValue> arguments)
{
double minValue = double.PositiveInfinity;
foreach (var arg in arguments)
{
var xComp = arguments.At(0);
if (xComp.IsAbrupt())
{
return(xComp);
}
xComp = xComp.value !.ToNumber();
if (xComp.IsAbrupt())
{
return(xComp);
}
var x = (xComp.value as NumberValue) !.number;
if (double.IsNaN(x))
{
return(Completion.NormalCompletion(NumberValue.DoubleNaN));
}
if (x < minValue)
{
minValue = x;
}
}
return(Completion.NormalCompletion(new NumberValue(minValue)));
}
private static Completion CreatePerIterationEnvironment(IEnumerable <string> perIterationBindings)
{
if (perIterationBindings.Any())
{
var lastIterationEnv = Interpreter.Instance().RunningExecutionContext().LexicalEnvironment;
var lastIterationEnvRec = lastIterationEnv.EnvironmentRecord;
var outer = lastIterationEnv.Outer;
if (outer == null)
{
throw new InvalidOperationException("Spec 13.7.4.9 step 1d");
}
var thisIterationEnv = outer.NewDeclarativeEnvironment();
var thisIterationEnvRec = thisIterationEnv.EnvironmentRecord;
foreach (var bn in perIterationBindings)
{
thisIterationEnvRec.CreateMutableBinding(bn, false);
var lastValue = lastIterationEnvRec.GetBindingValue(bn, true);
if (lastValue.IsAbrupt())
{
return(lastValue);
}
thisIterationEnvRec.InitializeBinding(bn, lastValue.value !);
}
Interpreter.Instance().RunningExecutionContext().LexicalEnvironment = thisIterationEnv;
}
return(Completion.NormalCompletion(UndefinedValue.Instance));
}
public override Completion LabelledEvaluate(Interpreter interpreter, List <string> labels)
{
IValue V = UndefinedValue.Instance;
while (true)
{
var conditionComp = whileExpression.Evaluate(interpreter);
var condition = conditionComp.GetValue();
if (condition.IsAbrupt())
{
return(condition);
}
if (!condition.value !.ToBoolean().boolean)
{
return(Completion.NormalCompletion(V));
}
var stmtResult = doStatement.Evaluate(interpreter);
if (!LoopContinues(stmtResult, labels))
{
return(stmtResult.UpdateEmpty(V));
}
if (stmtResult.value != null)
{
V = stmtResult.value;
}
}
}
private Completion EvaluateTypeof(Interpreter interpreter)
{
var valComp = unaryExpression.Evaluate(interpreter);
if (valComp.value is ReferenceValue reference)
{
if (reference.IsUnresolvableReference())
{
return(Completion.NormalCompletion(new StringValue("undefined")));
}
}
var val = valComp.GetValue();
if (val.IsAbrupt())
{
return(val);
}
return(Completion.NormalCompletion(new StringValue(val.value switch
{
UndefinedValue _ => "undefined",
NullValue _ => "object",
BooleanValue _ => "boolean",
NumberValue _ => "number",
StringValue _ => "string",
FunctionObject _ => "function",
Object _ => "object",
_ => throw new InvalidOperationException("OperatorUnaryExpression.EvaluateTypeof: unknown type"),
})));
public override Completion Evaluate(Interpreter interpreter)
{
var @ref = memberExpression.Evaluate(interpreter);
var funcComp = @ref.GetValue();
if (funcComp.IsAbrupt())
{
return(funcComp);
}
var func = funcComp.value !;
if (func == UndefinedValue.Instance && @ref.value is ReferenceValue r)
{
return(Completion.ThrowReferenceError($"Cannot call undefined method {r.referencedName } on a {r.baseValue.GetType().Name}"));
}
if (@ref.value is ReferenceValue referenceValue && !referenceValue.baseValue.IsPrimitive() && referenceValue.referencedName == "eval")
{
if (func == interpreter.CurrentRealm().Intrinsics.Eval)
{
var argList = arguments.ArgumentListEvaluation();
if (argList.IsAbrupt())
{
return(argList);
}
if (!argList.Other.Any())
{
return(Completion.NormalCompletion(UndefinedValue.Instance));
}
var evalText = argList.Other ![0];
public override Completion Evaluate(Interpreter interpreter)
{
if (System.Diagnostics.Debugger.IsAttached)
{
System.Diagnostics.Debugger.Break();
}
return(Completion.NormalCompletion());
}
public override Completion Evaluate(Interpreter interpreter)
{
if (!scriptBody.Any())
{
return(Completion.NormalCompletion(UndefinedValue.Instance));
}
throw new InvalidOperationException("Evaluate is not defined for scripts with bodies. Use ScriptEvaluate instead.");
}
public Completion Evaluate(Interpreter interpreter)
{
if (statementList == null)
{
return(Completion.NormalCompletion());
}
return(statementList.Evaluate(interpreter));
}
public override Completion Evaluate(Interpreter interpreter)
{
var comp = variableDeclarations.Evaluate(interpreter);
if (comp.IsAbrupt())
{
return(comp);
}
return(Completion.NormalCompletion());
}
public override Completion LabelledEvaluate(Interpreter interpreter, List <string> labelSet)
{
labelSet.Add(identifier.name);
var stmtResult = labelledItem.LabelledEvaluate(interpreter, labelSet);
if (stmtResult.completionType == CompletionType.Break && identifier.name == stmtResult.target)
{
stmtResult = Completion.NormalCompletion(stmtResult.value);
}
return(stmtResult);
}
public override Completion Evaluate(Interpreter interpreter)
{
foreach (var i in lexicalDeclarationItems)
{
var completion = i.Evaluate(interpreter);
if (completion.IsAbrupt())
{
return(completion);
}
}
return(Completion.NormalCompletion());
}
public override Completion LabelledEvaluate(Interpreter interpreter, List <string> labels)
{
var stmtResult = Evaluate(interpreter);
if (stmtResult.completionType == CompletionType.Break && stmtResult.target == null)
{
if (stmtResult.value == null)
{
return(Completion.NormalCompletion(UndefinedValue.Instance));
}
stmtResult = Completion.NormalCompletion(stmtResult.value);
}
return(stmtResult);
}
public override Completion Evaluate(Interpreter interpreter)
{
var lhs = unaryExpression.Evaluate(interpreter);
if (lhs.IsAbrupt())
{
return(lhs);
}
var lhsValue = lhs.GetValue();
if (lhsValue.IsAbrupt())
{
return(lhsValue);
}
var oldValueComp = lhsValue.value !.ToNumber();
if (oldValueComp.IsAbrupt())
{
return(oldValueComp);
}
var oldValue = oldValueComp.value as NumberValue;
if (!(lhs.value is ReferenceValue reference))
{
throw new InvalidOperationException("PrefixUpdateExpression.Evaluate: unaryExpression did not return a reference");
}
NumberValue newValue;
if (updateOperation == UpdateOperator.Decrement)
{
newValue = new NumberValue(oldValue !.number - 1);
}
else
{
newValue = new NumberValue(oldValue !.number + 1);
}
var putComp = reference.PutValue(newValue);
if (putComp.IsAbrupt())
{
return(putComp);
}
return(Completion.NormalCompletion(newValue));
}
public override Completion Evaluate(Interpreter interpreter)
{
IValue lastValue = UndefinedValue.Instance;
foreach (var expression in assignmentExpressions)
{
var comp = expression.Evaluate(interpreter).GetValue();
if (comp.IsAbrupt())
{
return(comp);
}
lastValue = comp.value !;
}
return(Completion.NormalCompletion(lastValue));
}
public override Completion Evaluate(Interpreter interpreter)
{
var obj = Utils.ObjectCreate(interpreter.CurrentRealm().Intrinsics.ObjectPrototype);
foreach (var property in propertyDefinitions)
{
var comp = property.PropertyDefinitionEvaluation(obj, true);
if (comp.IsAbrupt())
{
return(comp);
}
}
return(Completion.NormalCompletion(obj));
}
protected static Completion ForBodyEvaluation(AbstractExpression?test, AbstractExpression?increment, Statement stmt, IEnumerable <string> perIterationBindings, List <string> labelSet)
{
IValue V = UndefinedValue.Instance;
var comp = CreatePerIterationEnvironment(perIterationBindings);
if (comp.IsAbrupt())
{
return(comp);
}
while (true)
{
if (test != null)
{
var testComp = test.Evaluate(Interpreter.Instance());
var testValueComp = testComp.GetValue();
if (testValueComp.IsAbrupt())
{
return(testValueComp);
}
if (!testValueComp.value !.ToBoolean().boolean)
{
return(Completion.NormalCompletion(V));
}
}
var result = stmt.Evaluate(Interpreter.Instance());
if (!LoopContinues(result, labelSet))
{
return(result.UpdateEmpty(V));
}
if (result.value != null)
{
V = result.value;
}
comp = CreatePerIterationEnvironment(perIterationBindings);
if (comp.IsAbrupt())
{
return(comp);
}
if (increment != null)
{
var inc = increment.Evaluate(Interpreter.Instance()).GetValue();
if (inc.IsAbrupt())
{
return(inc);
}
}
}
}
public Completion PropertyDefinitionEvaluation(Object @object, bool enumerable)
{
var valueComp = Evaluate(Interpreter.Instance()).GetValue();
if (valueComp.IsAbrupt())
{
return(valueComp);
}
var value = valueComp.value !;
if (Utils.CreateDataPropertyOrThrow(@object, identifier.name, value).IsAbrupt())
{
throw new InvalidOperationException("Spec ! 12.2.6.8 IdentifierReference, step 6");
}
return(Completion.NormalCompletion());
}
public override Completion Evaluate(Interpreter interpreter)
{
if (!statementList.Any())
{
return(Completion.NormalCompletion());
}
var oldEnv = interpreter.RunningExecutionContext().LexicalEnvironment;
var blockEnv = oldEnv.NewDeclarativeEnvironment();
BlockDeclarationInstantiation(statementList, blockEnv);
interpreter.RunningExecutionContext().LexicalEnvironment = blockEnv;
Completion blockValue = statementList.Evaluate(interpreter);
interpreter.RunningExecutionContext().LexicalEnvironment = oldEnv;
return(blockValue);
}
public override Completion Evaluate(Interpreter interpreter)
{
var left = logicalOrExpression.Evaluate(interpreter).GetValue();
if (left.IsAbrupt())
{
return(left);
}
var leftValue = left.value !;
if (leftValue.ToBoolean().boolean)
{
return(Completion.NormalCompletion(leftValue));
}
return(logicalAndExpression.Evaluate(interpreter).GetValue());
}
public override Completion Evaluate(Interpreter interpreter)
{
var baseValueComp = dotMemberExpression.Evaluate(interpreter).GetValue();
if (baseValueComp.IsAbrupt())
{
return(baseValueComp);
}
var baseValue = baseValueComp.value !;
var coercible = baseValue.RequireObjectCoercible();
if (coercible.IsAbrupt())
{
return(coercible);
}
return(Completion.NormalCompletion(new ReferenceValue(baseValue, dotIdentifierName, IsStrictMode)));
}
public static Completion log(IValue @this, IReadOnlyList <IValue> arguments)
{
var xComp = arguments.At(0);
if (xComp.IsAbrupt())
{
return(xComp);
}
xComp = xComp.value !.ToNumber();
if (xComp.IsAbrupt())
{
return(xComp);
}
var x = (xComp.value as NumberValue) !.number;
return(Completion.NormalCompletion(new NumberValue(System.Math.Log(x))));
}
public Completion BindingInitialization(IValue value, LexicalEnvironment environment)
{
if (environment != null)
{
environment.EnvironmentRecord.InitializeBinding(name, value);
return(Completion.NormalCompletion(UndefinedValue.Instance));
}
var lhsComp = Interpreter.Instance().ResolveBinding(name, IsStrictMode);
if (lhsComp.IsAbrupt())
{
return(lhsComp);
}
var lhs = lhsComp.value as ReferenceValue;
return(lhs !.PutValue(value));
}
public override Completion Evaluate(Interpreter interpreter)
{
Completion lastValue = Completion.NormalCompletion();
foreach (var statement in statements)
{
var val = statement.Evaluate(interpreter);
if (val.IsAbrupt())
{
return(val);
}
if (val.value != null)
{
lastValue = val;
}
}
return(lastValue);
}
public override Completion Evaluate(Interpreter interpreter)
{
if (arrayLiteralItems.Count == 1 && arrayLiteralItems[0] is Elision e)
{
var array = ArrayObject.ArrayCreate(0);
array.Set("length", new NumberValue(e.width), false);
return(Completion.NormalCompletion(array));
}
else
{
var array = ArrayObject.ArrayCreate(0);
var len = ArrayAccumulate(array, 0);
if (len.IsAbrupt())
{
return(len);
}
array.Set("length", len.value !, false);
return(Completion.NormalCompletion(array));
}
}
public static Completion Calculate(IValue leftValue, IValue rightValue)
{
var baseComp = leftValue.ToNumber();
if (baseComp.IsAbrupt())
{
return(baseComp);
}
var exponentComp = rightValue.ToNumber();
if (exponentComp.IsAbrupt())
{
return(exponentComp);
}
double @base = (baseComp.value as NumberValue) !.number;
double exponent = (exponentComp.value as NumberValue) !.number;
return(Completion.NormalCompletion(new NumberValue(Math.Pow(@base, exponent))));
}
public Completion PropertyDefinitionEvaluation(Object @object, bool enumerable)
{
var valueComp = assignmentExpression.Evaluate(Interpreter.Instance());
if (valueComp.IsAbrupt())
{
return(valueComp);
}
var value = valueComp.value;
if (!(value is Object source))
{
throw new InvalidOperationException($"ObjectLiteral: tried to initialize an object using a spread on a non-object");
}
valueComp = Utils.CopyDataProperties(@object, source, excludedItems: Utils.EmptyList <string>());
if (valueComp.IsAbrupt())
{
return(valueComp);
}
return(Completion.NormalCompletion());
}
public override Completion Evaluate(Interpreter interpreter)
{
if (hasElse)
{
var conditionComp = conditionExpression.Evaluate(interpreter).GetValue();
if (conditionComp.IsAbrupt())
{
return(conditionComp);
}
var condition = conditionComp.value !.ToBoolean();
Completion stmtCompletion;
if (condition.boolean)
{
stmtCompletion = trueStatement.Evaluate(interpreter);
}
else
{
stmtCompletion = falseStatement !.Evaluate(interpreter);
}
return(stmtCompletion.UpdateEmpty(UndefinedValue.Instance));
}
else
{
var conditionComp = conditionExpression.Evaluate(interpreter).GetValue();
if (conditionComp.IsAbrupt())
{
return(conditionComp);
}
var condition = conditionComp.value !.ToBoolean();
if (!condition.boolean)
{
return(Completion.NormalCompletion(UndefinedValue.Instance));
}
else
{
var stmtCompletion = trueStatement.Evaluate(interpreter);
return(stmtCompletion.UpdateEmpty(UndefinedValue.Instance));
}
}
}
private Completion AbstractRelationalComparison(IValue x, IValue y, bool leftFirst = true)
{
IValue px, py;
if (leftFirst)
{
var xComp = x.ToPrimitive();
if (xComp.IsAbrupt())
{
return(xComp);
}
px = xComp.value !;
var yComp = y.ToPrimitive();
if (yComp.IsAbrupt())
{
return(yComp);
}
py = yComp.value !;
}
else
{
var yComp = y.ToPrimitive();
if (yComp.IsAbrupt())
{
return(yComp);
}
py = yComp.value !;
var xComp = x.ToPrimitive();
if (xComp.IsAbrupt())
{
return(xComp);
}
px = xComp.value !;
}
if (px is StringValue sx && py is StringValue sy)
{
return(Completion.NormalCompletion((string.Compare(sx.@string, sy.@string, StringComparison.InvariantCulture) < 0) ? BooleanValue.True : BooleanValue.False));
}
public Completion Evaluate(Interpreter interpreter)
{
if (assignmentExpression == null)
{
return(Completion.NormalCompletion());
}
var lhsComp = interpreter.ResolveBinding(name, IsStrictMode);
if (lhsComp.IsAbrupt())
{
return(lhsComp);
}
if (!(lhsComp.value is ReferenceValue referenceValue))
{
throw new InvalidOperationException("ResolveBinding didn't return a reference");
}
Completion value;
if (assignmentExpression is FunctionExpression functionExpression && functionExpression.isAnonymous)
{
value = functionExpression.NamedEvaluate(interpreter, name);
}
public static Completion MakeSuperPropertyReference(IValue actualThis, string propertyKey, bool strict)
{
var env = Interpreter.Instance().GetThisEnvironment();
if (!env.HasSuperBinding())
{
throw new InvalidOperationException("SuperHelper.MakeSuperPropertyReference: Interpreter.GetThisEnvironment has no super binding");
}
var baseValueComp = ((FunctionEnvironmentRecord)env).GetSuperBase();
if (baseValueComp.IsAbrupt())
{
return(baseValueComp);
}
var baseValue = baseValueComp.value !;
var coercible = baseValue.RequireObjectCoercible();
if (coercible.IsAbrupt())
{
return(coercible);
}
return(Completion.NormalCompletion(new SuperReferenceValue(baseValue, propertyKey, strict, actualThis)));
}