bjoernager/rust
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Querify global_backend_features

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At the very least this serves to deduplicate the diagnostics that are
output about unknown target features provided via CLI.
This commit is contained in:
Simonas Kazlauskas 2021-09-24 18:02:02 +03:00
parent c97c216efd
commit df701a292c
10 changed files with 58 additions and 48 deletions
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12
compiler/rustc_data_structures/src/small_c_str.rs
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@ -66,3 +66,15 @@ impl Deref for SmallCStr {
self.as_c_str()
}
}
impl<'a> FromIterator<&'a str> for SmallCStr {
fn from_iter<T: IntoIterator<Item = &'a str>>(iter: T) -> Self {
let mut data =
iter.into_iter().flat_map(|s| s.as_bytes()).copied().collect::<SmallVec<_>>();
data.push(0);
if let Err(e) = ffi::CStr::from_bytes_with_nul(&data) {
panic!("The iterator {:?} cannot be converted into a CStr: {}", data, e);
}
Self { data }
}
}