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Remove comparator.hh and switch to <=> in a bunch of places

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Known behavior changes:

- `MemorySourceAccessor`'s comparison operators no longer forget to
  compare the `SourceAccessor` base class.

Progress on #10832

What remains for that issue is hopefully much easier!
This commit is contained in:
John Ericson 2024-05-16 18:46:38 -04:00
parent 2a95a2d780
commit bc83b9dc1f
49 changed files with 300 additions and 271 deletions
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17
src/libutil/error.cc
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@ -46,27 +46,22 @@ std::ostream & operator <<(std::ostream & os, const HintFmt & hf)
/**
* An arbitrarily defined value comparison for the purpose of using traces in the key of a sorted container.
*/
inline bool operator<(const Trace& lhs, const Trace& rhs)
inline std::strong_ordering operator<=>(const Trace& lhs, const Trace& rhs)
{
// `std::shared_ptr` does not have value semantics for its comparison
// functions, so we need to check for nulls and compare the dereferenced
// values here.
if (lhs.pos != rhs.pos) {
if (!lhs.pos)
return true;
if (!rhs.pos)
return false;
if (*lhs.pos != *rhs.pos)
return *lhs.pos < *rhs.pos;
if (auto cmp = bool{lhs.pos} <=> bool{rhs.pos}; cmp != 0)
return cmp;
if (auto cmp = *lhs.pos <=> *rhs.pos; cmp != 0)
return cmp;
}
// This formats a freshly formatted hint string and then throws it away, which
// shouldn't be much of a problem because it only runs when pos is equal, and this function is
// used for trace printing, which is infrequent.
return lhs.hint.str() < rhs.hint.str();
return lhs.hint.str() <=> rhs.hint.str();
}
inline bool operator> (const Trace& lhs, const Trace& rhs) { return rhs < lhs; }
inline bool operator<=(const Trace& lhs, const Trace& rhs) { return !(lhs > rhs); }
inline bool operator>=(const Trace& lhs, const Trace& rhs) { return !(lhs < rhs); }
// print lines of code to the ostream, indicating the error column.
void printCodeLines(std::ostream & out,