averello/swift-mirror
1
0
Fork 0
mirror of https://github.com/apple/swift.git synced 2025-12-21 12:14:44 +01:00
Code Issues Packages Projects Releases Wiki Activity

Extend the coverage of the fast path in the UTF16 comparator to more than ascii.

Browse Source 
Swift SVN r18180
This commit is contained in:
Nadav Rotem
2014-05-16 05:58:39 +00:00
parent ccd282df1d
commit 70dfa94160
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
stdlib/core/StringUnicodeScalarView.swift
View File

@@ -124,7 +124,12 @@ extension String {
let e1 = self._base._nthContiguous(aIdx)
let e2 = other._base._nthContiguous(bIdx)
if _slowPath((e1 >= 0x80) | (e2 >= 0x80)) {
// The range 0xD800 .. 0xDFFF is reserved for lead and trail
// surrogates. In this code we are only comparing against the
// lower bound because most interesting characters are in that
// range. This is conversatively correct since the slow path is
// handling the surrogates correctly.
if _slowPath((e1 >= 0xD800) | (e2 >= 0xD800)) {
// Use slow unicode comparator if
// we found multi-byte scalar.
return _compareUnicode(other)