CODEWITHSUNDEEP
c#roslyn
Martin Cehelský
Martin Cehelský

Reputation: 3

How to get SyntaxNode "MethodDeclarationSyntax" from Semantic "Method"?

Syntax model and Semantic model communication

I have an "InvocationExpressionSyntax" "invocation" , from which i want to access "MethodDeclarationSyntax".

Don't want just to compare their names, because the method parameters may differ.

By using semantic model I got access to Operation of invocation. By operation I have an access to TargetMethod. I would like to get MethodDeclarationSyntax of that method.

var operation = (IInvocationOperation) semanticModel.GetOperation(invocation);
var methodInvoked = operation.TargetMethod;

Upvotes: 0

Views: 1009

Answers (1)

Abedron
Abedron

Reputation: 771

You can use this method 

private static SyntaxNode GetDeclarationSyntaxNode(InvocationExpressionSyntax invocationSyntax, SemanticModel semanticModel)
{
    var methodSymbol = (IMethodSymbol) semanticModel.GetSymbolInfo(invocationSyntax).Symbol;
    var syntaxReference = methodSymbol.DeclaringSyntaxReferences.FirstOrDefault();

    return syntaxReference?.GetSyntax();
}

There is detailed explanation Roslyn Get Method Declaration from InvocationExpression

Edit: include null-conditional operator to code

Upvotes: 1

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