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Rollup merge of #72551 - alilleybrinker:document-debug-stability, r=KodrAus

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First draft documenting Debug stability.

Debug implementations of std types aren't stable, and neither are derived Debug implementations for any types, including user-defined types. This commit adds a section to the Debug documentation noting this stability status.

This issue is tracked by #62794.
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Ralf Jung 2020-05-25 11:01:10 +02:00 committed by GitHub
commit 7c9fdb332b
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7
src/libcore/fmt/mod.rs
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@ -441,6 +441,13 @@ impl Display for Arguments<'_> {
/// `enum`s, it will use the name of the variant and, if applicable, `(`, then the
/// `Debug` values of the fields, then `)`.
///
/// # Stability
///
/// Derived `Debug` formats are not stable, and so may change with future Rust
/// versions. Additionally, `Debug` implementations of types provided by the
/// standard library (`libstd`, `libcore`, `liballoc`, etc.) are not stable, and
/// may also change with future Rust versions.
///
/// # Examples
///
/// Deriving an implementation: