Re: [Boost-users] [Proto] Splitting AST

Joel Falcou wrote:

Let's say I want to take an expression involving operators +,-,*,/ and a function split.

What I want to do is writing a transform taking such an expression and returning a fusion::vector or list (I guess) of expressions containing all sub-expressions of the original AST only separated on each insatcne of a split call.

E.g :

Xpr = a+b+split( c*d + split(e-f)); is turned into

Xprs = [ a+b+placeholder<1>, c*d+placeholder<2>, e-f];

I guess I should use the State/Data parameters of the transform but i can't get the thing right. Any hints on how to tackle this without losing hairs ?

You're right, that's tricky. I'll think about it as time allows. -- Eric Niebler BoostPro Computing http://www.boostpro.com