Memory, Allocator<T> & __USE_MALLOC & alternatives

[Phil Edwards]

On Wed, Jun 12, 2002 at 11:05:48AM +1200, Tony Bryant wrote:
> The lack of an allocator specifier for std::string is the killer I think. I 
> don't suppose there's an ISO standard "std::stringwithallocator<ALLOC>" 
> template?

Given that std::string is just

    typedef basic_string<char>   string;

and basic_string has a default parameter for the allocator,

    template<typename _CharT,
             typename _Traits = char_traits<_CharT>,
             typename _Alloc = allocator<_CharT>
            > class basic_string;

you could write

typedef std::basic_string<char, char_traits<char>, allocator<char> >  MyString;

in your code, use MyString everywhere, and then go back and tweak the
third parameter as necessary.


std::priority_queue takes a (default) parameter specifying the underlying
container; it doesn't handle the memory itself.  The underlying container,
say, vector, takes an allocator parameter.


Phil

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