[Boost-users] [Proto] Accessing inner types in transform

Subject: [Boost-users] [Proto] Accessing inner types in transform
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2008-11-02 11:40:56

Let's say I have a grammar which have the following terminal
proto::terminal<std::pair<_,_>>

I want to retrieve the first type of the pair in the terminal.
Can I write :

when< terminal< pair<_,_> >, _value::first()>

or should I wrote a small meta-function that extract this type ?

when< terminal< pair<_,_> >, first_(_value)>

TIA

-- 
___________________________________________
Joel Falcou - Assistant Professor
PARALL Team - LRI - Universite Paris Sud XI
Tel : [phone]