bdlb::TransparentStringHash Struct Reference

#include <bdlb_transparentstringhash.h>

Detailed Description

This struct defines a hash operation for different string types, enabling them for use for heterogeneous lookup in the standard associative containers such as bsl::unordered_map.

Note

Note that this class is an empty POD type.

See bdlb_transparentstringhash

Public Types
typedef void	is_transparent

Public Member Functions
	TransparentStringHash ()=default
	TransparentStringHash (const TransparentStringHash &original)=default
	~TransparentStringHash ()=default
TransparentStringHash &	operator= (const TransparentStringHash &rhs)=default
template<class CHAR >
std::size_t	operator() (const CHAR *str) const
template<class CHAR , class TRAITS , class ALLOCATOR >
std::size_t	operator() (const bsl::basic_string< CHAR, TRAITS, ALLOCATOR > &str) const
template<class CHAR , class TRAITS , class ALLOCATOR >
std::size_t	operator() (const std::basic_string< CHAR, TRAITS, ALLOCATOR > &str) const
template<class CHAR , class TRAITS >
std::size_t	operator() (const bsl::basic_string_view< CHAR, TRAITS > &str) const

Member Typedef Documentation

is_transparent

typedef void bdlb::TransparentStringHash::is_transparent

Type alias indicating this is a transparent hash functor.

Constructor & Destructor Documentation

TransparentStringHash() [1/2]

bdlb::TransparentStringHash::TransparentStringHash ( )

default

Create a TransparentStringHash object.

TransparentStringHash() [2/2]

bdlb::TransparentStringHash::TransparentStringHash ( const TransparentStringHash &  original )

default

Create a TransparentStringHash object.

Note

Note that as TransparentStringHash is an empty (stateless) type, this operation has no observable effect.

~TransparentStringHash()

bdlb::TransparentStringHash::~TransparentStringHash ( )

default

Destroy this object.

Member Function Documentation

operator()() [1/4]

template<class CHAR , class TRAITS , class ALLOCATOR >

std::size_t bdlb::TransparentStringHash::operator() ( const bsl::basic_string< CHAR, TRAITS, ALLOCATOR > &  str ) const

inline

operator()() [2/4]

template<class CHAR , class TRAITS >

std::size_t bdlb::TransparentStringHash::operator() ( const bsl::basic_string_view< CHAR, TRAITS > &  str ) const

inline

operator()() [3/4]

template<class CHAR >

std::size_t bdlb::TransparentStringHash::operator() ( const CHAR *  str ) const

inline

Return a hash code generated from the contents of the specified str.

operator()() [4/4]

template<class CHAR , class TRAITS , class ALLOCATOR >

std::size_t bdlb::TransparentStringHash::operator() ( const std::basic_string< CHAR, TRAITS, ALLOCATOR > &  str ) const

inline

operator=()

TransparentStringHash & bdlb::TransparentStringHash::operator= ( const TransparentStringHash &  rhs )

default

Assign to this object the value of the specified rhs object, and return a reference providing modifiable access to this object.

Note

Note that as TransparentStringHash is an empty (stateless) type, this operation has no observable effect.

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The documentation for this struct was generated from the following file:

• bdlb_transparentstringhash.h