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Function std.encoding.index

Returns the array index at which the (n+1)th code point begins.

The input to this function MUST be validly encoded. This is enforced by the function's in-contract.

Prototype

ptrdiff_t index(E)(
  const(E)[] s,
  int n
);

Supersedes

This function supersedes std.utf.toUTFindex().

Standards

Unicode 5.0, ASCII, ISO-8859-1, ISO-8859-2, WINDOWS-1250, WINDOWS-1252

Parameters

NameDescription
s the string to be counted
n the current code point index

Example

assert(index("\u20AC100",1) == 3);
assert(index("hällo",2) == 3);

Authors

Janice Caron

License

Boost License 1.0.

Comments