This is a discussion on strange syntax in stl (gnu version) - c++ ; I saw something really wierld in g++ version of stl source. void construct(pointer __p, const _Tp& __val) { ::new(__p) _Tp(__val); } anybody knows about the syntax new(__p) means? can new really take a pointer as a parameter?...
strange syntax in stl (gnu version) I saw something really wierld in g++ version of stl source.
void construct(pointer __p, const _Tp& __val) { ::new(__p)
_Tp(__val); }
anybody knows about the syntax new(__p) means? can new really take a
pointer as a parameter?
Re: strange syntax in stl (gnu version) Ningyu Shi wrote:
> I saw something really wierld in g++ version of stl source.
>
> void construct(pointer __p, const _Tp& __val) { ::new(__p)
> _Tp(__val); }
>
> anybody knows about the syntax new(__p) means? can new really take a
> pointer as a parameter?
>
Look up placement new.
--
Ian Collins.
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