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Function std.uni.graphemeStride
Computes the length of grapheme cluster starting at indexindex
Prototype
size_t graphemeStride(C)( C[] input, size_t index ) if (is(C : dchar));
Parameters
| Name | Description |
|---|---|
| C | type that is implicitly convertible to dchars |
| input | array of grapheme clusters |
| index | starting index into |
Returns
length of grapheme cluster
Example
// ASCII as usual is 1 code unit, 1 code point etc.
assert(graphemeStride(" ", 1) == 1);
// A + combing ring above
string city = "A\u030Arhus";
size_t first = graphemeStride(city, 0);
assert(first == 3); //\u030A has 2 UTF-8 code units
assert(city[0..first] == "A\u030A");
assert(city[first..$] == "rhus");
Authors
Dmitry Olshansky