Re: [Boost-users] [boost::wave] Finding out if a macro is defined

From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2007-03-06 14:34:20

Ovanes, 

> I tried to work with context_type::token_type::string_type 
> (On my machine it is resolved to
> flex_string) the problem is that the construct:
> 
> std::string s1("some string...");
> context_type::token_type::string_type s2(s1->begin(), s1->end());

Just use:

    context_type::token_type::string_type s1("some_macro_name");
    if (ctx.is_macro_defined(s1.begin(), s1.end()))
       ...

directly. I'll look into the other issue asap.

Regards Hartmut

> 
> crashed the app in the assign function call from the ctor:
> 
> template <class InputIterator>
>     flex_string(InputIterator begin, InputIterator end, const 
> A& a = A())
>     : Storage(a)
>     {
>        flex_string.hpp:1479: assign(begin, end); >>>>  boom!!!
>     }
> 
> The problem is:
> 
> assign calls replace:
> 
> template<class InputIterator>
> line 1906:    flex_string& replace(iterator i1, iterator i2,
>         InputIterator j1, InputIterator j2)
>     {
>         return ReplaceImpl(i1, i2, j1, j2,
>             
> Selector<std::numeric_limits<InputIterator>::is_specialized>());
>     }
> 
> Replace has BOOST_ASSERT(false) statement:
> template<class InputIterator>
> line 1897:    flex_string& ReplaceImpl(iterator i1, iterator i2,
>         InputIterator b, InputIterator e, Selector<0>)
>     {
>         BOOST_ASSERT(false);
>         return *this;
>     }
> 
> > I'll try to add these fixes to the upcoming release as 
> well, but will 
> > have to ask the release manager first.
> >
> > Regards Hartmut
> >
> 
> May be you can take a look at the calling logic and why this 
> assertion should fail?
> 
> Many Thanks for your help!
> 
> With Kind Regards,
> 
> Ovanes Markarian
> 
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