Re: [GiNaC-devel] Best way to iterate through an expression

Dear Ricardo, great idea! I compacted it to for (const auto& m: (is_a<mul>(some_ex) ? some_ex : lst{some_ex}) // Do something with m Greetings, Jan Am 10.05.2017 um 17:47 schrieb Ricardo Buring:

Dear Jan,

Here's a trick I've used to avoid such code duplication:

if (!is_a<mul>(some_ex)) some_ex = lst(some_ex); for (const auto& m : some_ex) { // Do something with m }

If some_ex is a product then you iterate over the factors, and otherwise you iterate over the 1-element lst containing only some_ex. Perhaps this fits your use case as well.

Best wishes, Ricardo