6477: Add infer_function_return_type assist r=matklad a=Veykril
This adds an assist to insert a functions return type if it hasn't been specified yet by inferring it from the functions tail expression. This assist only becomes active if the cursor is on the tail expression. See https://github.com/rust-analyzer/rust-analyzer/issues/6303#issuecomment-714657326
Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
Folks report a ton of hard-to-diagnose issues, the solution for which
is "unset RUST_SRC_PATH". Let's just ignore RUST_SRC_PATH when it
won't work anyway!
6470: Restore semantic token flickering workaround removed in #5697 r=kjeremy a=charlespierce
Closes#6452
Info
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* As discussed in #6452, the `Error('busy')` workaround for semantic token flickering was removed because the underlying issue was believed to be fixed in VS Code.
* It turns out that the fix isn't yet complete, so this caused flickering of the semantic highlighting when making rapid edits (e.g. typing quickly).
* This PR restores that workaround and makes it slightly more robust, covering all areas of semantic token middleware.
Changes
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* Added middleware functions for `provideDocumentSemanticTokens`, `provideDocumentSemanticTokensEdits`, and `provideDocumentRangeSemanticTokens` to match the 3 possible middleware hooks defined in https://github.com/microsoft/vscode-languageserver-node/blob/master/client/src/common/semanticTokens.ts#L33
* Each intercepts a `null` or `undefined` return and throws an error with the message `busy` instead, which prevents the tokens from being removed and re-added (causing the flickering behavior)
Tested
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* Tested locally that the flickering behavior is gone.
* There don't appear to be any significant tests of the VS Code plugin side of things, other than that it loads. Is there somewhere I can / should add tests to cover this behavior?
Co-authored-by: Charles Pierce <cpierce.grad@gmail.com>
6456: Support record variants in extract_struct_from_enum_variant r=matklad a=Veykril
As requested :)
This also prevents the assist from being disabled if a definition in the value namespace exists with the same name as our new struct since that won't cause a collision
#4468
Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
6458: Qualify trait impl created by add_custom_impl assist r=matklad a=Veykril
When we find at least one trait with the same name as the derive accessible from the current module we now generate a qualified path to that trait in the generated impl.
If we don't find any we just do what was done before and emit the trait name in the generated impl.
Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
This also seizes the opportunity to move integer literal parsing to
the syntax crate, were it logically belongs.
Note though that this is still done in an ad hoc manner -- we probably
should split kitchen sink ast::Literal into a separate APIs for
strings, ints, etc
