Re: [Boost-users] [Proto] How to access the grammar of an expression?

On 09/24/2010 02:33 PM, Roland Bock wrote:

Hi,

ist there a way to access the grammar that was used to construct an expression?

I have defined a metafunction

template struct grammar_less: mpl::false_ {};

which has specialization for some grammar combinations.

Now I want to define a function that can take two arguments so that

child0.grammar < child1.grammar

Any idea how to do that? My test-code is attached.

Regards,

Roland

Hi, since I know the structure of the types in question, I can circumvent the problem as shown in the attached code. Not nice, but I could probably use it. Regards, Roland