Struct print_positions::PrintPositions
source · pub struct PrintPositions<'a> { /* private fields */ }
Expand description
This iterator identifies print positions in the source string and returns start and end offsets of the data rather than the data itself. See PrintPositionData if you want to iterate through the data instead.
A print position is an immutable slice of the source string. It contains 1 grapheme cluster (by definition) and any ANSI escape codes found between graphemes in the source. The ANSI escape codes will generally preceed the grapheme (since these codes change the rendering of characters that follow), but sometimes will follow the grapheme (for the few codes that reset special graphic rendering).
use print_positions::print_positions;
let content = "\u{1f468}\u{200d}\u{1f467}\u{200d}\u{1f466}abc";
let segments: Vec<(usize, usize)> = print_positions(content).collect();
assert_eq!(vec!((0, 18), (18, 19), (19, 20), (20, 21)), segments);
// access print position data after segmenting source.
assert_eq!( &content[segments[1].0..segments[1].1], "a");
// Count print positions in content.
assert_eq!( print_positions(content).count(), 4);
Implementations§
source§impl<'a> PrintPositions<'a>
impl<'a> PrintPositions<'a>
sourcepub fn as_str(&self) -> &'a str
pub fn as_str(&self) -> &'a str
View the underlying data (the part yet to be iterated) as a slice of the original string.
let mut iter = print_positions("abc");
assert_eq!(iter.as_str(), "abc");
iter.next();
assert_eq!(iter.as_str(), "bc");
iter.next();
iter.next();
assert_eq!(iter.as_str(), "");
Trait Implementations§
source§impl<'a> Clone for PrintPositions<'a>
impl<'a> Clone for PrintPositions<'a>
source§impl<'a> Iterator for PrintPositions<'a>
impl<'a> Iterator for PrintPositions<'a>
§type Item = (usize, usize)
type Item = (usize, usize)
Iterator returns tuple of start offset and end + 1 offset in source string of current print position.
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