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LibRegex: Ensure the GoBack operation decrements the code unit index

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This was missed in commit 27d555bab0.
This commit is contained in:
Timothy Flynn 2021-08-16 10:28:26 -04:00 • committed by Ali Mohammad Pur
parent c4ee576531
commit 325eabc770
3 changed files with 33 additions and 2 deletions
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16
Userland/Libraries/LibRegex/RegexMatch.h
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@ -274,6 +274,22 @@ public:
});
}
size_t code_unit_offset_of(size_t code_point_index) const
{
return m_view.visit(
[&](StringView const& view) -> u32 {
Utf8View utf8_view { view };
return utf8_view.byte_offset_of(code_point_index);
},
[&](Utf32View const&) -> u32 { return code_point_index; },
[&](Utf16View const& view) -> u32 {
return view.code_unit_offset_of(code_point_index);
},
[&](Utf8View const& view) -> u32 {
return view.byte_offset_of(code_point_index);
});
}
bool operator==(char const* cstring) const
{
return m_view.visit(