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Add a note to as_conversions #6608

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Jan 19, 2021
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Add a note to as_conversions #6608

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8 changes: 8 additions & 0 deletions clippy_lints/src/as_conversions.rs
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Expand Up @@ -8,6 +8,14 @@ use crate::utils::span_lint_and_help;
declare_clippy_lint! {
/// **What it does:** Checks for usage of `as` conversions.
///
/// Note that this lint is specialized in linting *every single* use of `as`
/// regardless of whether good alternatives exist or not.
/// If you want more precise lints for `as`, please consider using these separate lints:
/// `unnecessary_cast`, `cast_lossless/possible_truncation/possible_wrap/precision_loss/sign_loss`,
/// `fn_to_numeric_cast(_with_truncation)`, `char_lit_as_u8`, `ref_to_mut` and `ptr_as_ptr`.
/// There is a good explanation the reason why this lint should work in this way and how it is useful
/// [in this issue](https://github.com/rust-lang/rust-clippy/issues/5122).
///
/// **Why is this bad?** `as` conversions will perform many kinds of
/// conversions, including silently lossy conversions and dangerous coercions.
/// There are cases when it makes sense to use `as`, so the lint is
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