[derive] Simplify code, remove obsolete features#375
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Clean up the implementation, especially in `fn impl_block`. Make the following notable changes: - Previously, `syn` didn't support parsing macro invocations in const generics without the `full` feature enabled. To avoid the compile-time overhead of that feature, we worked around it by constructing AST nodes manually. `syn` has since added support for this without requiring the `full` feature, so we make use of it. - We used to need to split types into those that transatively depended upon type generics (like `[T; 2]`) and those that didn't (like `[u8; 2]`). We made a change in #119 that made this distinction irrelevant, but we never removed the code to perform the split. In this commit, we remove that code. That code was the only reason we needed to enable `syn`'s `visit` feature, so we are also able to remove that feature dependency.
djkoloski
approved these changes
Sep 12, 2023
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Clean up the implementation, especially in
fn impl_block. Make the following notable changes:syndidn't support parsing macro invocations in const generics without thefullfeature enabled. To avoid the compile-time overhead of that feature, we worked around it by constructing AST nodes manually.synhas since added support for this without requiring thefullfeature, so we make use of it.[T; 2]) and those that didn't (like[u8; 2]). We made a change in Move field type bounds into where clauses #119 that made this distinction irrelevant, but we never removed the code to perform the split. In this commit, we remove that code. That code was the only reason we needed to enablesyn'svisitfeature, so we are also able to remove that feature dependency.