helios::utils::StringHash Struct Reference

Transparent hash functor for string types. More...

#include <string_hash.hpp>

Public Types
using	is_transparent = void
	Enables heterogeneous lookup.
using	hash_type = std::hash< std::string_view >

Public Member Functions
size_t	operator() (std::string_view str) const noexcept
	Hashes a string-like object.
size_t	operator() (const std::string &str) const noexcept
	Hashes a std::string.
size_t	operator() (const char *str) const noexcept
	Hashes a C-style string.

Detailed Description

Transparent hash functor for string types.

Enables heterogeneous lookup in unordered containers, allowing lookups with std::string_view without constructing temporary std::string objects. Supports std::string, std::string_view, and const char*.

Definition at line 16 of file string_hash.hpp.

Member Typedef Documentation

hash_type

using helios::utils::StringHash::hash_type = std::hash<std::string_view>

Definition at line 18 of file string_hash.hpp.

is_transparent

using helios::utils::StringHash::is_transparent = void

Enables heterogeneous lookup.

Definition at line 17 of file string_hash.hpp.

Member Function Documentation

operator()() [1/3]

size_t helios::utils::StringHash::operator() ( const char *  str ) const

inlinenoexcept

Hashes a C-style string.

Parameters

str	String to hash

Returns

Hash value

Definition at line 39 of file string_hash.hpp.

{ return hash_type{}(str); }

operator()() [2/3]

size_t helios::utils::StringHash::operator() ( const std::string &  str ) const

inlinenoexcept

Hashes a std::string.

Parameters

str	String to hash

Returns

Hash value

Definition at line 32 of file string_hash.hpp.

{ return hash_type{}(str); }

operator()() [3/3]

size_t helios::utils::StringHash::operator() ( std::string_view  str ) const

inlinenoexcept

Hashes a string-like object.

Parameters

str	String to hash

Returns

Hash value

Definition at line 25 of file string_hash.hpp.

{ return hash_type{}(str); }