protected JSExpression Translate_UnaryOp(ILExpression node, JSUnaryOperator op)
{
var inner = TranslateNode(node.Arguments[0]);
var innerType = JSExpression.DeReferenceType(inner.GetExpectedType(TypeSystem));
// Detect the weird pattern '!(x = y as z)' and transform it into '(x = y as z) != null'
if (
(op == JSOperator.LogicalNot) &&
!TypesAreAssignable(TypeSystem.Boolean, innerType)
) {
return new JSBinaryOperatorExpression(
JSOperator.Equal, inner, new JSDefaultValueLiteral(innerType), TypeSystem.Boolean
);
}
return new JSUnaryOperatorExpression(
op, inner, node.ExpectedType ?? node.InferredType
);
}
protected JSExpression Translate_UnaryOp(ILExpression node, JSUnaryOperator op)
{
var inner = TranslateNode(node.Arguments[0]);
var innerType = JSExpression.DeReferenceType(inner.GetExpectedType(TypeSystem));
// Detect the weird pattern '!(x = y as z)' and transform it into '(x = y as z) != null'
if (
(op == JSOperator.LogicalNot) &&
!TypesAreAssignable(TypeSystem.Boolean, innerType)
) {
return new JSBinaryOperatorExpression(
JSOperator.Equal, inner, new JSDefaultValueLiteral(innerType), TypeSystem.Boolean
);
}
// Insert correct casts when unary operators are applied to enums.
if (IsEnum(innerType) && IsEnum(node.ExpectedType ?? node.InferredType)) {
return JSCastExpression.New(
new JSUnaryOperatorExpression(
op,
JSCastExpression.New(inner, TypeSystem.Int32, TypeSystem),
TypeSystem.Int32
),
node.ExpectedType ?? node.InferredType, TypeSystem
);
}
return new JSUnaryOperatorExpression(
op, inner, node.ExpectedType ?? node.InferredType
);
}
