private CanCastExpression CreateCanCastExpression(Pattern.MatchContext matchContext, BinaryExpression node)
{
SafeCastExpression safeCast = (SafeCastExpression)matchContext[SafeCastKey];
List <Instruction> instructions = new List <Instruction>();
instructions.AddRange(safeCast.MappedInstructions);
instructions.AddRange(node.MappedInstructions);
instructions.AddRange(node.Right.UnderlyingSameMethodInstructions);
return(new CanCastExpression(
(Expression)codeTransformer.Visit(safeCast.Expression),
safeCast.TargetType,
instructions));
}
private bool TryMatchCanCastPattern(BinaryExpression node, IEnumerable <Pattern.ICodePattern> patterns, out CanCastExpression result)
{
foreach (Pattern.ICodePattern pattern in patterns)
{
Pattern.MatchContext matchContext = Pattern.CodePattern.Match(pattern, node);
if (matchContext.Success)
{
result = CreateCanCastExpression(matchContext, node);
return(true);
}
}
result = null;
return(false);
}
