uhighsurr

Returns 1 if the Unicode value at "integer_expression" is the high half of a surrogate pair (which should appear first in the pair). Otherwise, it returns 0. This function allows you to write explicit code for surrogate handling. Particularly, if a substring starts on a Unicode character where uhighsurr () is true, extract a substring of at least 2 Unicode values, as substr() does not extract just 1. Substr () does not extract half of a surrogate pair.

uhighsurr ( string_expression , integer_expression )