protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
{
PrimitiveExpression o = other as PrimitiveExpression;
return(o != null && (this.Value == AnyValue || object.Equals(this.Value, o.Value)));
}
public override void VisitCastExpression(CastExpression castExpression)
{
ParenthesizeIfRequired(castExpression.Expression, InsertParenthesesForReadability ? Primary : Unary);
// There's a nasty issue in the C# grammar: cast expressions including certain operators are ambiguous in some cases
// "(int)-1" is fine, but "(A)-b" is not a cast.
UnaryOperatorExpression uoe = castExpression.Expression as UnaryOperatorExpression;
if (uoe != null && !(uoe.Operator == UnaryOperatorType.BitNot || uoe.Operator == UnaryOperatorType.Not))
{
if (TypeCanBeMisinterpretedAsExpression(castExpression.Type))
{
Parenthesize(castExpression.Expression);
}
}
// The above issue can also happen with PrimitiveExpressions representing negative values:
PrimitiveExpression pe = castExpression.Expression as PrimitiveExpression;
if (pe != null && pe.Value != null && TypeCanBeMisinterpretedAsExpression(castExpression.Type))
{
TypeCode typeCode = Type.GetTypeCode(pe.Value.GetType());
switch (typeCode)
{
case TypeCode.SByte:
if ((sbyte)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
case TypeCode.Int16:
if ((short)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
case TypeCode.Int32:
if ((int)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
case TypeCode.Int64:
if ((long)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
case TypeCode.Single:
if ((float)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
case TypeCode.Double:
if ((double)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
case TypeCode.Decimal:
if ((decimal)pe.Value < 0)
{
Parenthesize(castExpression.Expression);
}
break;
}
}
base.VisitCastExpression(castExpression);
}
void IAstVisitor.VisitPrimitiveExpression(PrimitiveExpression primitiveExpression)
{
Visit(EnterPrimitiveExpression, LeavePrimitiveExpression, primitiveExpression);
}