Files
rust/library/coretests/tests/ffi/cstr.rs
Tamir Duberstein a82062055a Delegate <CStr as Debug> to ByteStr
This allows UTF-8 characters to be printed without escapes, rather than
just ASCII.
2025-06-12 12:53:14 -04:00

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Rust
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use core::ffi::CStr;
#[test]
fn compares_as_u8s() {
let a: &CStr = c"Hello!"; // Starts with ascii
let a_bytes: &[u8] = a.to_bytes();
assert!((..0b1000_0000).contains(&a_bytes[0]));
let b: &CStr = c"こんにちは!"; // Starts with non ascii
let b_bytes: &[u8] = b.to_bytes();
assert!((0b1000_0000..).contains(&b_bytes[0]));
assert_eq!(Ord::cmp(a, b), Ord::cmp(a_bytes, b_bytes));
assert_eq!(PartialOrd::partial_cmp(a, b), PartialOrd::partial_cmp(a_bytes, b_bytes));
}
#[test]
fn debug() {
let s = c"abc\x01\x02\n\xE2\x80\xA6\xFF";
assert_eq!(format!("{s:?}"), r#""abc\x01\x02\n…\xff""#);
}
#[test]
fn display() {
let s = c"\xf0\x28\x8c\xbc";
assert_eq!(format!("{}", s.display()), "<EFBFBD>(<28><>");
}