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7c263adb2a
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.
7 lines
137 B
Rust
7 lines
137 B
Rust
#![crate_type = "lib"]
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#[cfg(overflow_checks)] //~ ERROR `cfg(overflow_checks)` is experimental
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pub fn cast(v: i64)->u32{
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todo!()
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}
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