On 01/30/10 00:37, Hicham Mouline wrote:
Hello,
struct params { double field1; double field2; double field3; double fiedl4; };
I would like to generate all the types that hold any combination of the members of params. [snip]
Step1: Create cross-product of void and {field1,field2,...}. This will produce a sequence of pairs: no_yes = ( (void,field1) , (void,field2) ... , (void,fieldn) ) Step2: Create the crosss product of all rows in no_yes. cross_no_yes = ( (void,void,..void) , (field1,void,...void) , (void,field2,void...,void) ... , (field1,field2,...fieldn) ) step3: remove all the voids in all the rows of cross_no_yes. Since the size<no_yes> == n and each element in that row is size 2, the cross_no_yes size would be 2^n. Then simply rm the all void row. Not tested.