libstdc++
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Public Types | |
enum class | _Construct { _Token } |
Public Member Functions | |
constexpr | nullopt_t (_Construct) |
Tag type to disengage optional objects.
Definition at line 81 of file experimental/optional.
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strong |
Definition at line 88 of file experimental/optional.
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inlineexplicitconstexpr |
Definition at line 91 of file experimental/optional.