Function width 

pub fn width(s: &str) -> u16

The number of terminal cells s occupies, saturating at u16::MAX.

Wide characters (CJK, most emoji) count as two columns; combining marks and most control characters count as zero. Span::width and Line::width are built on this function; reach for it directly to measure a borrowed &str without constructing either type first.

See width_usize for the unsaturated measurement.

Examples

use retroglyph_core::text::width;

assert_eq!(width("hello"), 5);
assert_eq!(width("中文"), 4); // each CJK char is 2 columns