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Merged
bors merged 3 commits into from
Feb 13, 2024
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docs: mention round-to-even in precision formatting #120967

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docs: mention round-to-even in precision formatting
tristan-f-r Feb 12, 2024
30f6665
style: fmt
tristan-f-r Feb 12, 2024
0f53e72
docs: use correct link, use secondary example
tristan-f-r Feb 13, 2024
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13 changes: 13 additions & 0 deletions library/alloc/src/fmt.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -278,6 +278,19 @@
//! Hello, ` 123` has 3 right-aligned characters
//! ```
//!
//! When truncuating these values, Rust uses round-to-even, which may
//! cause concern when formatting for scientific notation. For example,
//!
//! ```
//! print!("{0:.1$e}", 12345, 3);
//! ```
//!
//! Would return:
//!
//! ```text
//! 1.234e4
//! ```
//!
//! ## Localization
//!
//! In some programming languages, the behavior of string formatting functions
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