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Added emplace(void) for older compilers

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Andrzej Krzemienski committed 2015-05-15 18:10:19 +02:00
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commit 8ca74951b0
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doc/28_ref_optional_semantics.qbk
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@@ -621,8 +621,10 @@ __SPACE__
of type `T` with `std::forward<Args>(args)...`.
* [*Postconditions: ] `*this` is [_initialized].
* [*Throws:] Whatever the selected `T`'s constructor throws.
* [*Notes:] `T` need not be __MOVE_CONSTRUCTIBLE__ or `MoveAssignable`. On compilers that do not support variadic templates, the signature falls back to single-argument: `template<class Arg> void emplace(Arg&& arg)`. On compilers that do not support rvalue references, the signature falls back to two overloads: taking `const` and non-`const` lvalue reference.
* [*Exception Safety:] If an exception is thrown during the initialization of `T`, `*this` is ['uninitialized].
* [*Notes:] `T` need not be __MOVE_CONSTRUCTIBLE__ or `MoveAssignable`.
On compilers that do not support variadic templates, the signature falls back to two overloads:`template<class Arg> void emplace(Arg&& arg)` and `void emplace()`.
On compilers that do not support rvalue references, the signature falls back to three overloads: taking `const` and non-`const` lvalue reference, and third with empty function argument list.
* [*Example:]
``
T v;