import cpp

from Expr e, string pure, string impure, string globalimpure
where
	if e.isPure() then pure = "isPure" else pure = "" and
	if e.mayBeImpure() then impure = "mayBeImpure" else impure = "" and
	if e.mayBeGloballyImpure() then globalimpure = "mayBeGloballyImpure" else globalimpure = ""
select e, pure, impure, globalimpure