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| author | Alva Snædís <alva@alva.email> | 2018-09-17 03:40:31 +0000 |
|---|---|---|
| committer | Alva Snædís <alva@alva.email> | 2018-09-17 16:09:23 +0000 |
| commit | 79da7a0a2f3c5490e1b8a4233795424bcf05520a (patch) | |
| tree | 9f43817a4b6e5f7f1523ffa403380cd01dc8592e /src/libsyntax | |
| parent | e4e4039c5b70807edfe41f6511b56520b3786ef3 (diff) | |
| download | rust-79da7a0a2f3c5490e1b8a4233795424bcf05520a.tar.gz rust-79da7a0a2f3c5490e1b8a4233795424bcf05520a.zip | |
libsyntax: add optional help message for deprecated features
Diffstat (limited to 'src/libsyntax')
| -rw-r--r-- | src/libsyntax/feature_gate.rs | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs index 603dfad38eb..96328be2dad 100644 --- a/src/libsyntax/feature_gate.rs +++ b/src/libsyntax/feature_gate.rs @@ -711,7 +711,7 @@ pub enum AttributeGate { impl AttributeGate { fn is_deprecated(&self) -> bool { match *self { - Gated(Stability::Deprecated(_), ..) => true, + Gated(Stability::Deprecated(_, _), ..) => true, _ => false, } } @@ -720,8 +720,9 @@ impl AttributeGate { #[derive(Copy, Clone, Debug)] pub enum Stability { Unstable, - // Argument is tracking issue link. - Deprecated(&'static str), + // First argument is tracking issue link; second argument is an optional + // help message, which defaults to "remove this attribute" + Deprecated(&'static str, Option<&'static str>), } // fn() is not Debug @@ -1044,7 +1045,7 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG ("no_builtins", Whitelisted, Ungated), ("no_mangle", Whitelisted, Ungated), ("no_debug", Whitelisted, Gated( - Stability::Deprecated("https://github.com/rust-lang/rust/issues/29721"), + Stability::Deprecated("https://github.com/rust-lang/rust/issues/29721", None), "no_debug", "the `#[no_debug]` attribute was an experimental feature that has been \ deprecated due to lack of demand", @@ -1057,7 +1058,8 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG cfg_fn!(omit_gdb_pretty_printer_section))), ("unsafe_destructor_blind_to_params", Normal, - Gated(Stability::Deprecated("https://github.com/rust-lang/rust/issues/34761"), + Gated(Stability::Deprecated("https://github.com/rust-lang/rust/issues/34761", + Some("replace this attribute with `#[may_dangle]`")), "dropck_parametricity", "unsafe_destructor_blind_to_params has been replaced by \ may_dangle and will be removed in the future", @@ -1136,7 +1138,8 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG ("panic_implementation", Normal, Gated(Stability::Deprecated("https://github.com/rust-lang/rust/issues/44489\ - #issuecomment-415140224"), + #issuecomment-415140224", + Some("replace this attribute with `#[panic_handler]`")), "panic_implementation", "this attribute was renamed to `panic_handler`", cfg_fn!(panic_implementation))), |