rust/tests/ui/feature-gates/feature-gate-cfg_overflow_checks.stderr

error[E0658]: `cfg(overflow_checks)` is experimental and subject to change
  --> $DIR/feature-gate-cfg_overflow_checks.rs:3:7
   |
LL | #[cfg(overflow_checks)]
   |       ^^^^^^^^^^^^^^^
   |
   = note: see issue #111466 <https://github.com/rust-lang/rust/issues/111466> for more information
   = help: add `#![feature(cfg_overflow_checks)]` to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.
Add support for `cfg(overflow_checks)` This PR adds support for detecting if overflow checks are enabled in similar fashion as debug_assertions are detected. Possible use-case of this, for example, if we want to use checked integer casts in builds with overflow checks, e.g. ```rust pub fn cast(val: usize)->u16 { if cfg!(overflow_checks) { val.try_into().unwrap() } else{ vas as _ } } ``` Resolves #91130. Tracking issue: #111466. 2023-05-02 08:53:11 -05:00			error[E0658]: `cfg(overflow_checks)` is experimental and subject to change
			`--> $DIR/feature-gate-cfg_overflow_checks.rs:3:7`
			`\|`
			`LL \| #[cfg(overflow_checks)]`
			`\| ^^^^^^^^^^^^^^^`
			`\|`
			`= note: see issue #111466 <https://github.com/rust-lang/rust/issues/111466> for more information`
			= help: add `#![feature(cfg_overflow_checks)]` to the crate attributes to enable

			`error: aborting due to previous error`

			For more information about this error, try `rustc --explain E0658`.