bdlb::CaselessStringViewHash Struct Reference

#include <bdlb_caselessstringviewhash.h>

Public Types
typedef bsl::string_view	argument_type
typedef bsl::size_t	result_type
typedef void	is_transparent
	Type alias indicating this is a transparent hash functor.

Public Member Functions
	BSLMF_NESTED_TRAIT_DECLARATION (CaselessStringViewHash, bsl::is_trivially_copyable)
	BSLMF_NESTED_TRAIT_DECLARATION (CaselessStringViewHash, bsl::is_trivially_default_constructible)
	CaselessStringViewHash ()=default
	Create a CaselessStringViewHash object.
	CaselessStringViewHash (const CaselessStringViewHash &original)=default
	~CaselessStringViewHash ()=default
	Destroy this object.
CaselessStringViewHash &	operator= (const CaselessStringViewHash &rhs)=default
bsl::size_t	operator() (bsl::string_view argument) const

Detailed Description

This struct defines a hash operation for string views enabling bsl::strings or bsl::string_views to be used as keys in the standard unordered associative containers such as bsl::unordered_map and bsl::unordered_set. Note that this class is an empty POD type.

Member Typedef Documentation

argument_type

typedef bsl::string_view bdlb::CaselessStringViewHash::argument_type

is_transparent

typedef void bdlb::CaselessStringViewHash::is_transparent

result_type

typedef bsl::size_t bdlb::CaselessStringViewHash::result_type

Constructor & Destructor Documentation

CaselessStringViewHash() [1/2]

bdlb::CaselessStringViewHash::CaselessStringViewHash ( )

default

CaselessStringViewHash() [2/2]

bdlb::CaselessStringViewHash::CaselessStringViewHash ( const CaselessStringViewHash &  original )

default

Create a CaselessStringViewHash object. Note that as CaselessStringViewHash is an empty (stateless) type, this operation will have no observable effect.

~CaselessStringViewHash()

bdlb::CaselessStringViewHash::~CaselessStringViewHash ( )

default

Member Function Documentation

BSLMF_NESTED_TRAIT_DECLARATION() [1/2]

bdlb::CaselessStringViewHash::BSLMF_NESTED_TRAIT_DECLARATION	(	CaselessStringViewHash	,
		bsl::is_trivially_copyable
	)

BSLMF_NESTED_TRAIT_DECLARATION() [2/2]

bdlb::CaselessStringViewHash::BSLMF_NESTED_TRAIT_DECLARATION	(	CaselessStringViewHash	,
		bsl::is_trivially_default_constructible
	)

operator()()

bsl::size_t bdlb::CaselessStringViewHash::operator()

(

bsl::string_view

argument

)

const

Return a hash code generated from the contents of the specified null-terminated argument string, cast to lower case. The behavior is undefined unless argument points to a null-terminated string.

operator=()

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

default

Assign to this object the value of the specified rhs object, and a return a reference providing modifiable access to this object. Note that as CaselessStringViewHash is an empty (stateless) type, this operation will have no observable effect.

---

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

• bdlb_caselessstringviewhash.h