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| author | AngelicosPhosphoros <xuzin.timur@gmail.com> | 2023-05-02 17:53:11 +0400 |
|---|---|---|
| committer | AngelicosPhosphoros <xuzin.timur@gmail.com> | 2023-05-11 18:06:31 +0400 |
| commit | 7c263adb2afc310b96422bd33317407bc5385bf9 (patch) | |
| tree | e5c2a5db3896f6832dfe64f857461c292c463f3e /compiler/rustc_span/src | |
| parent | f8d8ffa2eba53928662dc57bc3a6c5608beb26f1 (diff) | |
| download | rust-7c263adb2afc310b96422bd33317407bc5385bf9.tar.gz rust-7c263adb2afc310b96422bd33317407bc5385bf9.zip | |
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.
Diffstat (limited to 'compiler/rustc_span/src')
| -rw-r--r-- | compiler/rustc_span/src/symbol.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs index 60efcb768cb..9951d8f4fc1 100644 --- a/compiler/rustc_span/src/symbol.rs +++ b/compiler/rustc_span/src/symbol.rs @@ -463,6 +463,7 @@ symbols! { cfg_doctest, cfg_eval, cfg_hide, + cfg_overflow_checks, cfg_panic, cfg_sanitize, cfg_target_abi, @@ -1065,6 +1066,7 @@ symbols! { or_patterns, other, out, + overflow_checks, overlapping_marker_traits, owned_box, packed, |