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std::filesystem::hash_value

Defined in header <filesystem>
std::size_t hash_value( const path& p ) noexcept;
(since C++17)

Parameters

p - a std::filesystem::path object

Return value

A hash value such that if for two paths, p1 == p2 then hash_value(p1) == hash_value(p2).

Exceptions

noexcept specification:
noexcept

Notes

Equality of two paths is determined by comparing each component separately, so, for example "a//b" equals "a/b" and has the same hash_value.

hash_value originates from the boost.filesystem library where it was used for interoperability with boost.hash (which calls hash_value where available).

Example

See also

compares the lexical representations of two paths lexicographically
(public member function)
(C++11)
hash function object
(class template)

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