Alexander Medvednikov
6cce632507
* compiler: reduce repeated self-compilation lookups and copies Reuse immutable type and call metadata, avoid unnecessary name work and node copies, and accelerate standard map, string and builder operations. Add focused coverage for cache invalidation and borrowed storage lifetime. * docs: record paired self-compilation results
Description
strings provides utilities for efficiently processing large strings.
If you got here looking for methods available on the string struct, those
methods are found in the builtin module.
Builder rune methods write U+FFFD for surrogate halves and values above U+10FFFF, including repeated writes. Valid Unicode scalar values retain their UTF-8 encoding.
levenshtein_distance_percentage returns 100 for identical strings, including two empty strings.
An empty string compared with a nonempty string returns zero.
get_close_matches(word, candidates, cutoff) ranks candidates by Levenshtein similarity
from highest to lowest, retaining candidate order for tied scores. The required cutoff
is on a 0..100 scale; NaN and values outside that range panic. For example,
get_close_matches('appel', ['apple', 'pear', 'ape'], 60) returns ['apple', 'ape'].
Builder buffer methods clamp requested byte ranges to the stored buffer. Negative counts to
go_back or cut_last do nothing; counts beyond its length discard or return the whole buffer.
go_back_to and cut_to treat negative positions as zero and leave positions past the end alone.
spart returns only the intersection of the requested range with the buffer.
split_after(s, sep) retains each separator in its preceding piece, including a final empty
piece after a trailing separator. An empty separator returns [s]. equal_fold(a, b) folds
ASCII letters only. last_index_any(s, chars) searches bytes and returns a byte index or -1;
use contains_rune(s, r) to search for a complete Unicode rune.
indent(s, prefix, skip_first) adds prefix to each line separated by \n.
When skip_first is true, the first line is unchanged. Empty lines are also prefixed,
including the empty final line after a trailing newline. An empty input is one empty line:
it returns prefix when skip_first is false, and an empty string otherwise.