#include <bslstl_optional.h>
Public Member Functions | |
| Optional_DataImp () BSLS_KEYWORD_NOEXCEPT | |
| template<class... ARGS> | |
| TYPE & | emplace (bslma::Allocator *allocator, BSLS_COMPILERFEATURES_FORWARD_REF(ARGS)...) |
| template<class INIT_LIST_TYPE , class... ARGS> | |
| TYPE & | emplace (bslma::Allocator *allocator, std::initializer_list< INIT_LIST_TYPE > initializer_list, BSLS_COMPILERFEATURES_FORWARD_REF(ARGS)...) |
| void | reset () BSLS_KEYWORD_NOEXCEPT |
| TYPE & | value () |
| bool | hasValue () const BSLS_KEYWORD_NOEXCEPT |
| const TYPE & | value () const |
Detailed Description
template<class TYPE>
struct bslstl::Optional_DataImp< TYPE >
This component-private struct manages a value_type object in an optional object. This class provides an abstraction for const value type. An optional object may contain an object of const type. An assignment to such an optional object should not succeed. However, unless the optional object itself is const, it should be possible to change the value of the optional object using emplace. In order to allow for that, this class manages a non-const object of value_type, but all the accessors return a const adjusted reference to the managed object.
Constructor & Destructor Documentation
| bslstl::Optional_DataImp< TYPE >::Optional_DataImp | ( | ) |
Create an empty Optional_DataImp object.
Member Function Documentation
| TYPE& bslstl::Optional_DataImp< TYPE >::emplace | ( | bslma::Allocator * | allocator, | |
| BSLS_COMPILERFEATURES_FORWARD_REF(ARGS) | ... | |||
| ) |
Create an object of StoredType in d_buffer using the specified allocator and arguments and return a reference providing modifiable access to the underlying TYPE object.
| TYPE& bslstl::Optional_DataImp< TYPE >::emplace | ( | bslma::Allocator * | allocator, | |
| std::initializer_list< INIT_LIST_TYPE > | initializer_list, | |||
| BSLS_COMPILERFEATURES_FORWARD_REF(ARGS) | ... | |||
| ) |
Create an object of StoredType in d_buffer using the specified allocator, initializer_list and arguments, and return a reference providing modifiable access to the underlying TYPE object.
| void bslstl::Optional_DataImp< TYPE >::reset | ( | ) |
Destroy the value_type object in d_buffer, if any.
| TYPE& bslstl::Optional_DataImp< TYPE >::value | ( | ) |
Return the value_type object in d_buffer with const qualification adjusted to match that of TYPE. The behavior is undefined unless this->hasValue() == true.
| bool bslstl::Optional_DataImp< TYPE >::hasValue | ( | ) | const |
Return true if this objects has a value, and false otherwise.
| const TYPE& bslstl::Optional_DataImp< TYPE >::value | ( | ) | const |
Return the value_type object in d_buffer with const qualification adjusted to match that of TYPE. The behavior is undefined unless this->hasValue() == true.
The documentation for this struct was generated from the following file:
Generated on Fri Mar 31 2023 13:30:32 for BDE Release 3.115.0.0 Production Release by
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