On 03/06/2005 07:59 AM, Pavel Chikulaev wrote:
I'm currently working on library "Lazy". [snip] Library's sample usage:
//Matrix.h [snip] //lazy constuctors which enables lazy operators Matrix(LAZY_OP(Matix_ + Matrix_)); //Matrix operator +(Matrix, Matrix) Matrix(LAZY_OP(Matrix_ * Matrix_)); //... Matrix(LAZY_OP(-Matrix_); Matrix(LAZY_OP(Matrix_ + Matrix_ * Matrix_)); //ternary operator [snip] So what do you think? Is there any similar approaches available? I've also very curious about how this was done. Many years ago, I read Budd's
_An Apl Compiler_ ( See http://web.engr.oregonstate.edu/~budd/vita/books.html for details ), and IIRC, some of the techniques he used there might be useful for something like this. IOW, he evaluated the data flow for a apl expression and somehow created c code to evaluate the rhs. IIRC, he also mentioned vector machines. Anyway, it may give you some more ideas for lazy evaluation.