substring_codepoint
String.substring_codepoint
create substring of this string consisting of codepoints from (inclusive) .. to (exclusive).
Precondition
pre debug : 0 ≤ from ≤ to (debug 2): to ≤ codepoint_count
0.098dev (GIT hash b44352b4c68decbc58a097b291a1c8f3a5a05486)