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Reenable early feature-gates as future-compat warnings

This commit is contained in:
Christopher Durham 2022-08-17 06:52:47 -05:00
parent e9e46c95ce
commit 767239f740
11 changed files with 224 additions and 34 deletions

View file

@ -3212,6 +3212,56 @@ declare_lint! {
};
}
declare_lint! {
/// The `unstable_syntax_pre_expansion` lint detects the use of unstable
/// syntax that is discarded during attribute expansion.
///
/// ### Example
///
/// ```rust
/// #[cfg(FALSE)]
/// macro foo() {}
/// ```
///
/// {{produces}}
///
/// ### Explanation
///
/// The input to active attributes such as `#[cfg]` or procedural macro
/// attributes is required to be valid syntax. Previously, the compiler only
/// gated the use of unstable syntax features after resolving `#[cfg]` gates
/// and expanding procedural macros.
///
/// To avoid relying on unstable syntax, move the use of unstable syntax
/// into a position where the compiler does not parse the syntax, such as a
/// functionlike macro.
///
/// ```rust
/// # #![deny(unstable_syntax_pre_expansion)]
///
/// macro_rules! identity {
/// ( $($tokens:tt)* ) => { $($tokens)* }
/// }
///
/// #[cfg(FALSE)]
/// identity! {
/// macro foo() {}
/// }
/// ```
///
/// This is a [future-incompatible] lint to transition this
/// to a hard error in the future. See [issue #65860] for more details.
///
/// [issue #65860]: https://github.com/rust-lang/rust/issues/65860
/// [future-incompatible]: ../index.md#future-incompatible-lints
pub UNSTABLE_SYNTAX_PRE_EXPANSION,
Warn,
"unstable syntax can change at any point in the future, causing a hard error!",
@future_incompatible = FutureIncompatibleInfo {
reference: "issue #65860 <https://github.com/rust-lang/rust/issues/65860>",
};
}
declare_lint_pass! {
/// Does nothing as a lint pass, but registers some `Lint`s
/// that are used by other parts of the compiler.
@ -3280,6 +3330,7 @@ declare_lint_pass! {
POINTER_STRUCTURAL_MATCH,
NONTRIVIAL_STRUCTURAL_MATCH,
SOFT_UNSTABLE,
UNSTABLE_SYNTAX_PRE_EXPANSION,
INLINE_NO_SANITIZE,
BAD_ASM_STYLE,
ASM_SUB_REGISTER,