2271b82007
internal: clean and enhance readability for `generate_delegate_trait` Continue from #16112 This PR primarily involves some cleanup and simple refactoring work, including: - Adding numerous comments to layer the code and explain the behavior of each step. - Renaming some variables to make them more sensible. - Simplify certain operations using a more elegant approach. The goal is to make this intricate implementation clearer and facilitate future maintenance. In addition to this, the PR also removes redundant `path_transform` operations for `type_gen_args`. Taking the example of `impl Trait<T1> for S<S1>`, where `S1` is considered. The struct `S` must be in the file where the user triggers code actions, so there's no need for the `path_transform`. Furthermore, before performing the transform, we've already renamed `S1`, ensuring it won't clash with existing generics parameters. Therefore, there's no need to transform it.
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