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Provide std::hash<Symbol>

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This commit is contained in:
Eelco Dolstra 2024-06-06 19:32:46 +02:00
parent c274e005b6
commit 6d843ce9fe
3 changed files with 14 additions and 3 deletions
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11
src/libexpr/symbol-table.hh
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@ -69,6 +69,8 @@ public:
auto operator<=>(const Symbol other) const { return id <=> other.id; }
bool operator==(const Symbol other) const { return id == other.id; }
friend class std::hash<Symbol>;
};
/**
@ -132,3 +134,12 @@ public:
};
}
template<>
struct std::hash<nix::Symbol>
{
std::size_t operator()(const nix::Symbol & s) const noexcept
{
return std::hash<decltype(s.id)>{}(s.id);
}
};