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Better stringSplit

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I need this for some `ParseURL` improvements, but I figure this is
better to send as its own PR.

I changed the tests willy-nilly to sometimes use
`std::list<std::string_view>` instead of `Strings` (which is
`std::list<std::string>`).

Co-Authored-By: Sergei Zimmerman <sergei@zimmerman.foo>
This commit is contained in:
John Ericson 2025-08-26 14:37:13 -04:00
parent 0bd9d6a28e
commit cc4aa70e6e
2 changed files with 66 additions and 45 deletions
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17
src/libutil/include/nix/util/strings-inline.hh
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@ -26,18 +26,29 @@ C tokenizeString(std::string_view s, std::string_view separators)
}
template<class C, class CharT>
C basicSplitString(std::basic_string_view<CharT> s, std::basic_string_view<CharT> separators)
void basicSplitStringInto(C & accum, std::basic_string_view<CharT> s, std::basic_string_view<CharT> separators)
{
C result;
size_t pos = 0;
while (pos <= s.size()) {
auto end = s.find_first_of(separators, pos);
if (end == s.npos)
end = s.size();
result.insert(result.end(), std::basic_string<CharT>(s, pos, end - pos));
accum.insert(accum.end(), typename C::value_type{s.substr(pos, end - pos)});
pos = end + 1;
}
}
template<typename C>
void splitStringInto(C & accum, std::string_view s, std::string_view separators)
{
basicSplitStringInto<C, char>(accum, s, separators);
}
template<class C, class CharT>
C basicSplitString(std::basic_string_view<CharT> s, std::basic_string_view<CharT> separators)
{
C result;
basicSplitStringInto(result, s, separators);
return result;
}