Fix FIXME for generic_arg_infer in create_substs_for_ast_path
#91847
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Dec 13, 2021
…lcnr Fix FIXME for `generic_arg_infer` in `create_substs_for_ast_path` Fixes a FIXME, does some general refactoring of this fn, and also fixes a bug where we would use a const params defaults instead of an inference var ([playground](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=19456f65ea5dc3fcaa9b696f842ab380)) (lot of stuff in one PR but it was all so close together...) r? `@lcnr` Fixes rust-lang#91614
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| LL | let y = Mask::<_, _>::splat(false); | ||
| | - ^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `T` | ||
| | | | ||
| | consider giving `y` the explicit type `Mask<_, LANES>`, where the type parameter `T` is specified |
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| | consider giving `y` the explicit type `Mask<_, LANES>`, where the type parameter `T` is specified | |
| | consider giving `y` the explicit type `Mask<T, LANES>`, where the type parameter `T` is specified |
Shouldn't the _ be T for the suggestion to make sense (in isolation)? It says consider giving […] the explicit type […], where the type parameter T is specified. In this case , it might not be ambiguous. However, when more type parameters are involved it would be. I remember there was some part in rustc which could handle this generically.
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Yea this error message is sort of weird (especially how it is _ for the type and LANES for the const despite both being inference var)
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…askrgr Rollup of 5 pull requests Successful merges: - rust-lang#91699 (Add `-webkit-appearance: none` to search input) - rust-lang#91846 (rustdoc: Reduce number of arguments for `run_test` a bit) - rust-lang#91847 (Fix FIXME for `generic_arg_infer` in `create_substs_for_ast_path`) - rust-lang#91849 (GATs outlives lint: Try to prove bounds) - rust-lang#91855 (Stabilize const_cstr_unchecked) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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Fixes a FIXME, does some general refactoring of this fn, and also fixes a bug where we would use a const params defaults instead of an inference var (playground)
(lot of stuff in one PR but it was all so close together...)
r? @lcnr
Fixes #91614