Skip to content

Explain why inlining default ToString impl #74852

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
bors merged 1 commit into from
Jul 30, 2020
Merged

Explain why inlining default ToString impl #74852

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions library/alloc/src/string.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2196,6 +2196,9 @@ pub trait ToString {
/// since `fmt::Write for String` never returns an error itself.
#[stable(feature = "rust1", since = "1.0.0")]
impl<T: fmt::Display + ?Sized> ToString for T {
// A common guideline is to not inline generic functions. However,
// remove `#[inline]` from this method causes non-negligible regression.
// See <https://github.com/rust-lang/rust/pull/74852> as last attempt try to remove it.
#[inline]
default fn to_string(&self) -> String {
use fmt::Write;
Expand Down