fix: Add check before show signature help #80945
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Add a check before displaying Signature Help by verifying if we are inside a lambda block so the signature is shown correctly only when appropriate.
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| private static bool IsPositionInLambdaBlock(SyntaxNode root, int position) | ||
| { | ||
| var token = root.FindToken(position); | ||
| var lambda = token.Parent?.AncestorsAndSelf().OfType<LambdaExpressionSyntax>().FirstOrDefault(); |
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Should probably be AnonymousMethodExpressionSyntax
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Just a question, because the error appear in both cases. Shouldn't this statement be an AND checking for AnonymousMethodExpressionSyntax or LambdaExpressionSyntax (since they cannot be coerced into each other from the standpoint of inheritance)? Because the error appear for both cases...
| void M1(Action a) { } | ||
| void M2() | ||
| { | ||
| M1(() => |
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Can you add tests for a=> and then an anonymous delegate as well.
… lambda expression and statementes, including parenthesized and anonymous block
| private static TextSpan? GetSyntaxSpan(SyntaxNode? node) | ||
| { | ||
| var ancestors = node?.AncestorsAndSelf(); | ||
| var lambda = ancestors?.OfType<LambdaExpressionSyntax>().FirstOrDefault(); |
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You can use the common super type of these types just once. Greatly simplifying things
Now is using a super type for it called AnonymousFunctionExpressionSyntax, reducing the nescessary code.
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Add a check before displaying Signature Help by verifying if we are inside a lambda block so the signature is shown correctly only when appropriate.
This pull request addresses an issue where signature help was incorrectly triggered inside the body of lambda expressions in C#.
The main change is to prevent signature help from appearing when the cursor is inside a lambda block, improving the user
experience in scenarios involving lambdas. The update includes both the implementation of the fix and an associated unit test to verify the new behavior.
Signature Help Behavior Improvements:
SignatureHelpUtilitiesto detect when the cursor is inside a lambda block and prevent signature help from appearing in these cases. [1] [2]Testing:
NoSignatureHelpInsideLambdaBlockinInvocationExpressionSignatureHelpProviderTests.csto ensure signature help is not triggered inside lambda blocks.Fixes #79733