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Function `std.uni.graphemeStride`

Computes the length of grapheme cluster starting at index. Both the resulting length and the index are measured in code units.


						
				size_t graphemeStride(C)
				(
				

				  scope const C[] input,
				

				  size_t index
				

				) pure @safe
				

				if (is(C : dchar));

Parameters

Name	Description
C	type that is implicitly convertible to `dchars`
input	array of grapheme clusters
index	starting index into `input[]`

Returns

length of grapheme cluster

Example

writeln(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
writeln(city[0 .. first]); // "A\u030A"
writeln(city[first .. $]); // "rhus"

Authors

Dmitry Olshansky

License

Boost License 1.0.