Move UsedLetters with RankedMatch

1 files changed, 15 insertions, 0 deletions

diff --git a/src/ranked_match.hh b/src/ranked_match.hh
index de03fd4c..0e0e49c4 100644
--- a/src/ranked_match.hh
+++ b/src/ranked_match.hh
@@ -6,9 +6,21 @@
 namespace Kakoune
 {
 
+using UsedLetters = uint64_t;
+UsedLetters used_letters(StringView str);
+
+constexpr UsedLetters upper_mask = 0xFFFFFFC000000;
+
+inline UsedLetters to_lower(UsedLetters letters)
+{
+    return ((letters & upper_mask) >> 26) | (letters & (~upper_mask));
+}
+
 struct RankedMatch
 {
     RankedMatch(StringView candidate, StringView query);
+    RankedMatch(StringView candidate, UsedLetters candidate_letters,
+                StringView query, UsedLetters query_letters);
 
     const StringView& candidate() const { return m_candidate; }
     bool operator<(const RankedMatch& other) const;
@@ -17,6 +29,9 @@ struct RankedMatch
     explicit operator bool() const { return not m_candidate.empty(); }
 
 private:
+    template<typename TestFunc>
+    RankedMatch(StringView candidate, StringView query, TestFunc test);
+
     StringView m_candidate;
     bool m_first_char_match = false;
     bool m_prefix = false;