Create an Optional_DataImp object, which contains the result of invocation of the specified invocable with the specified arg.
Synopsis
Declared in <bslstl_optional.h>
template<
class t_INVOCABLE,
class t_ARG>
Optional_DataImp(
Optional_InvokeConstructorTag,
t_INVOCABLE&& invocable,
t_ARG&& arg);
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