feat: make String iterable over code points with iterate/iteratorValue primitives

Add String as a subclass of Sequence in core.wren and implement the iterator protocol for strings in wren_core.c. The string_iterate native advances through UTF-8 code point boundaries, while string_iteratorValue extracts the full code point at a given byte index. Includes comprehensive test coverage for iteration, edge cases (empty strings, mid-sequence positions), and error handling for invalid iterator types and out-of-bounds indices. Also updates documentation for String, List, and Sequence classes with iterator protocol details and usage examples.

This commit is contained in:

Bob Nystrom

2015-01-23 04:58:22 +00:00

parent 7e52e36a1c

commit 488fb27b91

14 changed files with 141 additions and 21 deletions

builtin/core.wren

View File

@@ -44,6 +44,8 @@ class Sequence {
 }
 class String is Sequence {}
 class List is Sequence {
   addAll(other) {
     for (element in other) {