public override JsExpression VisitUnaryExpression(JsUnaryExpression expression, object data)
{
switch (expression.NodeType)
{
case ExpressionNodeType.PrefixPlusPlus:
case ExpressionNodeType.PostfixPlusPlus:
case ExpressionNodeType.PrefixMinusMinus:
case ExpressionNodeType.PostfixMinusMinus:
if (expression.Operand is JsIdentifierExpression)
{
// Increment/decrement both reads and writes.
string name = ((JsIdentifierExpression)expression.Operand).Name;
Result.LocalReadSet.Add(name);
Result.LocalWriteSet.Add(name);
return(expression);
}
else
{
Result.UsesExternalState = true;
return(base.VisitExpression(expression.Operand, data)); // Increments/decrements something that is not a local. This is external state.
}
case ExpressionNodeType.Delete: {
Result.UsesExternalState = true; // Delete counts as external state.
return(base.VisitExpression(expression.Operand, data));
}
default:
return(base.VisitUnaryExpression(expression, data));
}
}
public virtual JsNode Visit(JsUnaryExpression node)
{
return(DefaultVisit(node, x =>
{
x.Operand = (JsExpression)x.Operand.Accept(this);
return x;
}));
}
public override JsExpression VisitUnaryExpression(JsUnaryExpression expression, object data)
{
switch (expression.NodeType)
{
case ExpressionNodeType.PrefixPlusPlus:
case ExpressionNodeType.PrefixMinusMinus:
case ExpressionNodeType.PostfixPlusPlus:
case ExpressionNodeType.PostfixMinusMinus:
case ExpressionNodeType.Delete:
_result = true;
return(expression);
default:
return(base.VisitUnaryExpression(expression, data));
}
}
public override void VisitUnaryExpression(JsUnaryExpression node)
{
switch (node.Operator)
{
case JsUnaryOperator.Negate:
output.Append("-");
node.Operand.Accept(this);
break;
case JsUnaryOperator.LogicalNot:
output.Append("!");
node.Operand.Accept(this);
break;
case JsUnaryOperator.PostDecrement:
node.Operand.Accept(this);
output.Append("--");
break;
case JsUnaryOperator.PostIncrement:
node.Operand.Accept(this);
output.Append("++");
break;
case JsUnaryOperator.PreDecrement:
output.Append("--");
node.Operand.Accept(this);
break;
case JsUnaryOperator.PreIncrement:
output.Append("++");
node.Operand.Accept(this);
break;
case JsUnaryOperator.BitwiseNot:
output.Append("~");
node.Operand.Accept(this);
break;
default:
throw new Exception();
}
}
public object VisitUnaryExpression(JsUnaryExpression expression, bool parenthesized)
{
string prefix = "", postfix = "";
bool alwaysParenthesize = false;
switch (expression.NodeType)
{
case ExpressionNodeType.PrefixPlusPlus: prefix = "++"; break;
case ExpressionNodeType.PrefixMinusMinus: prefix = "--"; break;
case ExpressionNodeType.PostfixPlusPlus: postfix = "++"; break;
case ExpressionNodeType.PostfixMinusMinus: postfix = "--"; break;
case ExpressionNodeType.LogicalNot: prefix = "!"; break;
case ExpressionNodeType.BitwiseNot: prefix = "~"; break;
case ExpressionNodeType.Positive: prefix = "+"; break;
case ExpressionNodeType.Negate: prefix = "-"; break;
case ExpressionNodeType.TypeOf: prefix = "typeof"; alwaysParenthesize = true; break;
case ExpressionNodeType.Void: prefix = "void"; alwaysParenthesize = true; break;
case ExpressionNodeType.Delete: prefix = "delete "; break;
default: throw new ArgumentException("expression");
}
_cb.Append(prefix);
VisitExpression(expression.Operand, (GetPrecedence(expression.Operand.NodeType) > GetPrecedence(expression.NodeType)) || alwaysParenthesize);
_cb.Append(postfix);
return(null);
}
public virtual void Visit(JsUnaryExpression node)
{
DefaultVisit(node);
node.Operand.Accept(this);
}
public virtual JsExpression VisitUnaryExpression(JsUnaryExpression expression, TData data)
{
var operand = VisitExpression(expression.Operand, data);
return(ReferenceEquals(operand, expression.Operand) ? expression : JsExpression.Unary(expression.NodeType, operand));
}
public override JsExpression VisitUnaryExpression(JsUnaryExpression expression, object data)
{
_result = true;
return(expression);
}
/// <summary> /// Equalses the specified other. /// </summary> /// <param name="other">The other.</param> /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns> protected bool Equals(JsUnaryExpression other) => Equals(Operator, other.Operator) && Equals(Argument, other.Argument);
protected bool Equals(JsUnaryExpression other) => Equals(Op, other.Op) && Equals(Target, other.Target);
public void Visit(JsUnaryExpression node)
{
BeforeVisit(node);
DefaultVisit(node, VisitUnaryExpression);
AfterVisit(node);
}
public virtual void VisitUnaryExpression(JsUnaryExpression node)
{
}
