2692ae1ddd
- `width()` computes the displayed width of a string, ignoring the width of control characters.
- arguably we might do *something* else for control characters, but the question is, what?
- users who want to do something else can iterate over chars()
- `graphemes()` returns a `Graphemes` struct, which implements an iterator over the grapheme clusters of a &str.
- fully compliant with [UAX#29](http://www.unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries)
- passes all [Unicode-supplied tests](http://www.unicode.org/reports/tr41/tr41-15.html#Tests29)
- added code to generate additionial categories in `unicode.py`
- `Cn` aka `Not_Assigned`
- categories necessary for grapheme cluster breaking
- tidied up the exports from libunicode
- all exports are exposed through a module rather than directly at crate root.
- std::prelude imports UnicodeChar and UnicodeStrSlice from std::char and std::str rather than directly from libunicode
closes #7043
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| posix.rs | ||
| windows.rs | ||