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Provide std::hash<SourcePath>

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This commit is contained in:
Eelco Dolstra 2024-06-06 19:12:36 +02:00
parent 337a5a23b7
commit cdc23b67a6
3 changed files with 19 additions and 8 deletions
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6
src/libexpr/eval.cc
View file

@ -1011,7 +1011,7 @@ void EvalState::evalFile(const SourcePath & path, Value & v, bool mustBeTrivial)
if (!e)
e = parseExprFromFile(resolvedPath);
fileParseCache[resolvedPath] = e;
fileParseCache.emplace(resolvedPath, e);
try {
auto dts = debugRepl
@ -1034,8 +1034,8 @@ void EvalState::evalFile(const SourcePath & path, Value & v, bool mustBeTrivial)
throw;
}
fileEvalCache[resolvedPath] = v;
if (path != resolvedPath) fileEvalCache[path] = v;
fileEvalCache.emplace(resolvedPath, v);
if (path != resolvedPath) fileEvalCache.emplace(path, v);
}

10
src/libexpr/eval.hh
View file

@ -307,15 +307,15 @@ private:
/* Cache for calls to addToStore(); maps source paths to the store
paths. */
Sync<std::map<SourcePath, StorePath>> srcToStore;
Sync<std::unordered_map<SourcePath, StorePath>> srcToStore;
/**
* A cache from path names to parse trees.
*/
#if HAVE_BOEHMGC
typedef std::map<SourcePath, Expr *, std::less<SourcePath>, traceable_allocator<std::pair<const SourcePath, Expr *>>> FileParseCache;
typedef std::unordered_map<SourcePath, Expr *, std::hash<SourcePath>, std::equal_to<SourcePath>, traceable_allocator<std::pair<const SourcePath, Expr *>>> FileParseCache;
#else
typedef std::map<SourcePath, Expr *> FileParseCache;
typedef std::unordered_map<SourcePath, Expr *> FileParseCache;
#endif
FileParseCache fileParseCache;
@ -323,9 +323,9 @@ private:
* A cache from path names to values.
*/
#if HAVE_BOEHMGC
typedef std::map<SourcePath, Value, std::less<SourcePath>, traceable_allocator<std::pair<const SourcePath, Value>>> FileEvalCache;
typedef std::unordered_map<SourcePath, Value, std::hash<SourcePath>, std::equal_to<SourcePath>, traceable_allocator<std::pair<const SourcePath, Value>>> FileEvalCache;
#else
typedef std::map<SourcePath, Value> FileEvalCache;
typedef std::unordered_map<SourcePath, Value> FileEvalCache;
#endif
FileEvalCache fileEvalCache;

11
src/libutil/source-path.hh
View file

@ -115,8 +115,19 @@ struct SourcePath
{
return {accessor, accessor->resolveSymlinks(path, mode)};
}
friend class std::hash<nix::SourcePath>;
};
std::ostream & operator << (std::ostream & str, const SourcePath & path);
}
template<>
struct std::hash<nix::SourcePath>
{
std::size_t operator()(const nix::SourcePath & s) const noexcept
{
return std::hash<decltype(s.path)>{}(s.path);
}
};