pub trait UnicodeWidthChar: Sealed {
// Required methods
fn width(self) -> Option<usize>;
fn width_cjk(self) -> Option<usize>;
}Expand description
Methods for determining displayed width of Unicode characters.
Required Methods§
Sourcefn width(self) -> Option<usize>
fn width(self) -> Option<usize>
Returns the character’s displayed width in columns, or None if the
character is a control character.
This function treats characters in the Ambiguous category according to Unicode Standard Annex #11 as 1 column wide. This is consistent with the recommendations for non-CJK contexts, or when the context cannot be reliably determined.
Sourcefn width_cjk(self) -> Option<usize>
fn width_cjk(self) -> Option<usize>
Returns the character’s displayed width in columns, or None if the
character is a control character.
This function treats characters in the Ambiguous category according to Unicode Standard Annex #11 as 2 columns wide. This is consistent with the recommendations for CJK contexts.
Dyn Compatibility§
This trait is dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety".