public static bool CanRefactor(
InvocationExpressionSyntax invocation,
SemanticModel semanticModel,
CancellationToken cancellationToken)
{
if (SyntaxAnalyzer.IsEnumerableExtensionOrImmutableArrayExtensionMethod(invocation, "Select", 2, semanticModel, cancellationToken))
{
ArgumentListSyntax argumentList = invocation.ArgumentList;
if (argumentList?.IsMissing == false)
{
SeparatedSyntaxList <ArgumentSyntax> arguments = argumentList.Arguments;
if (arguments.Count == 1)
{
ArgumentSyntax argument = arguments.First();
ExpressionSyntax expression = argument.Expression;
if (expression?.IsMissing == false)
{
SyntaxKind expressionKind = expression.Kind();
if (expressionKind == SyntaxKind.SimpleLambdaExpression)
{
var lambda = (SimpleLambdaExpressionSyntax)expression;
if (CanRefactor(lambda.Parameter, lambda.Body))
{
return(true);
}
}
else if (expressionKind == SyntaxKind.ParenthesizedLambdaExpression)
{
var lambda = (ParenthesizedLambdaExpressionSyntax)expression;
ParameterListSyntax parameterList = lambda.ParameterList;
if (parameterList != null)
{
SeparatedSyntaxList <ParameterSyntax> parameters = parameterList.Parameters;
if (parameters.Count == 1 &&
CanRefactor(parameters.First(), lambda.Body))
{
return(true);
}
}
}
}
}
}
}
return(false);
}