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stdx: Add floor/ceil/is grapheme boundary functions to RopeSliceExt

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These functions are the equivalent of 23b424a46 for grapheme clusters.
In order to add the `is_grapheme_boundary` function we also need to
query whether a byte index lies on a character boundary, so this change
also adds `is_char_boundary`.
This commit is contained in:
Michael Davis 2025-01-26 16:52:29 -05:00
parent 0364521dca
commit 39b72329b4
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6 changed files with 213 additions and 4 deletions
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helix-stdx/Cargo.toml
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@ -20,6 +20,7 @@ regex-cursor = "0.1.4"
bitflags.workspace = true
once_cell = "1.19"
regex-automata = "0.4.9"
unicode-segmentation.workspace = true
[target.'cfg(windows)'.dependencies]
windows-sys = { version = "0.59", features = ["Win32_Foundation", "Win32_Security", "Win32_Security_Authorization", "Win32_Storage_FileSystem", "Win32_System_Threading"] }