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Subject: Re: [boost] detecting a constructor with a specific signature
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-01-27 12:59:08


Kenny Riddile wrote:
> vicente.botet wrote:
>> have you tried to double ()
>> template< typename T >
>> typename result< sizeof T(( make< const std::string& >(), make< Foo&
>> >() )) >::type select( int );
> Ya, I thought of that right after posting and it does fix the
> compilation error. The issue I'm having now is that both
> has_foo_ctor< Foo >::value
> has_foo_ctor< Bar >::value
> are evaluating to true and I'm not sure why.

When you use double parentheses, it calls the comma operator and
only passes a single argument to the constructor.

In Christ,
Steven Watanabe

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