nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2025-02-07 04:23:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

improve format impl for literals

Browse Source
This commit is contained in:
Conrad Ludgate 2022-05-28 11:01:09 +01:00
parent 9d1aeaeb82
commit 3f404bfa86
1 changed files with 10 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
library/alloc/src/fmt.rs
View File

@ -604,9 +604,15 @@ use crate::string;
#[cfg(not(no_global_oom_handling))] #[cfg(not(no_global_oom_handling))]
#[must_use] #[must_use]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn format(args: Arguments<'_>) -> string::String { pub fn format(args: Arguments<'_>) -> string::String {
let capacity = args.estimated_capacity(); #[cold]
let mut output = string::String::with_capacity(capacity); fn format_cold(args: Arguments<'_>) -> string::String {
output.write_fmt(args).expect("a formatting trait implementation returned an error"); let capacity = args.estimated_capacity();
output let mut output = string::String::with_capacity(capacity);
output.write_fmt(args).expect("a formatting trait implementation returned an error");
output
}
args.as_str().map_or_else(|| format_cold(args), crate::borrow::ToOwned::to_owned)
} }