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

#![crate_type = "lib"]

#[cfg(overflow_checks)] //~ ERROR `cfg(overflow_checks)` is experimental
pub fn cast(v: i64)->u32{
    todo!()
}
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			`#![crate_type = "lib"]`

			#[cfg(overflow_checks)] //~ ERROR `cfg(overflow_checks)` is experimental
			`pub fn cast(v: i64)->u32{`
			`todo!()`
			`}`