private static InvocationExpressionSyntax SplitLinqWhereInvocation(
InvocationExpressionSyntax invocation,
SimpleLambdaExpressionSyntax filter)
{
var filterParameter = filter.Parameter;
var filterExpression = (ExpressionSyntax)filter.Body;
var factors = FactorizeExpression(filterExpression);
var newInvocation = ExtendedSyntaxFactory.MakeInvocationWithLambdaArgument(
invocation.Expression,
filterParameter,
factors[0]);
for (int i = 1; i < factors.Count; ++i)
{
var memberAccess = SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
newInvocation,
SyntaxFactory.IdentifierName(LinqHelper.WhereMethodName));
newInvocation = ExtendedSyntaxFactory.MakeInvocationWithLambdaArgument(
memberAccess,
filterParameter,
factors[i]);
}
return(newInvocation.WithTriviaFrom(invocation));
}
private static InvocationExpressionSyntax SplitFunctionComposition(
InvocationExpressionSyntax selectInvocation,
SimpleLambdaExpressionSyntax projection,
InvocationExpressionSyntax[] invocationStack,
SemanticModel semanticModel)
{
var lambdaParameter = projection.Parameter;
var parameterName = lambdaParameter.Identifier.Text;
var parameterSymbol = semanticModel.GetDeclaredSymbol(lambdaParameter);
Func <InvocationExpressionSyntax, bool> isNeedToReplaceInvocation = i =>
DataFlowAnalysisHelper.IsIdentifierReferencedIn(
parameterName,
parameterSymbol,
semanticModel,
i);
var newSelectInvocation = ExtendedSyntaxFactory.MakeInvocationWithLambdaArgument(
selectInvocation.Expression,
lambdaParameter,
invocationStack[0]);
var invocationReplacer = new InvocationReplacer(
isNeedToReplaceInvocation,
SyntaxFactory.IdentifierName(parameterName));
for (int i = 1; i < invocationStack.Length; ++i)
{
var innerInvocation = invocationStack[i];
var processedInnerInvocation = ReplaceInvocationsInArguments(
innerInvocation,
invocationReplacer);
var memberAccess = SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
newSelectInvocation,
SyntaxFactory.IdentifierName(LinqHelper.SelectMethodName));
newSelectInvocation = ExtendedSyntaxFactory.MakeInvocationWithLambdaArgument(
memberAccess,
lambdaParameter,
processedInnerInvocation);
}
return(newSelectInvocation.WithTriviaFrom(selectInvocation));
}
