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🦋 std::flat_multimap::value_compare 🦋

okay bestie, welcome to the C++ Standard Library manual 💖 we're looking at std::flat_multimap::value_compare, and it's giving very niche-but-iconic comparator energy ✨

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✨ NAME ✨

std::flat_multimap::value_compare — literally the std::flat_multimap::value_compare page, no cap 🫶

🌈 Synopsis 🌈

class value_compare;

(since C++23)

std::flat_multimap::value_compare is a function object that compares objects of type std::flat_multimap::const_reference (a pair of references to the stored key/value) by comparing the first components (i.e. keys) of the passed pairs. slay, keys only 🔑

🎀 Member objects 🎀

• comp (private) — the comparison function object of type std::flat_multimap::key_compare (exposition-only member object*).

🌸 Member functions 🌸

• constructor (private) — constructs a value_compare object; the page also labels it (public member function).
• operator() — compares two values of type value_type (public member function).

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🛠️ std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>::value_compare::value_compare 🛠️

private:                         (exposition only*)
value_compare( key_compare c );

It initializes the underlying instance of the comparator comp to c. cute 💅

💜 Parameters 💜

• c — a comparator to assign.

🔥 std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>::value_compare::operator() 🔥

bool operator()( const const_reference& lhs, const const_reference& rhs ) const;

Compares lhs.first and rhs.first by calling the stored comparator comp. yes bestie, it's comparing the keys 🔑

🍓 Parameters 🍓

• lhs, rhs — values to compare.

⭐ Return value ⭐

comp(lhs.first, rhs.first)

💀 Exceptions 💀

May throw implementation-defined exceptions. dramatic, but that's what it says 😭

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💖 source/version: cppreference.com · date: 2024.06.10 · that's the whole page, mwah 💖