http://d.puremagic.com/issues/show_bug.cgi?id=4239
Summary: Mixed tuple comparison Product: D Version: future Platform: Other OS/Version: Windows Status: NEW Severity: enhancement Priority: P2 Component: Phobos AssignedTo: nob...@puremagic.com ReportedBy: simen.kja...@gmail.com --- Comment #0 from Simen Kjaeraas <simen.kja...@gmail.com> 2010-05-26 14:49:58 PDT --- I have been unable to find a way to compare two tuples of mixed content, like (int, "foo"). For this purpose, I have created the following template, and request its inclusion in Phobos. /** Compares tuples with a mixture of types and values. Example: ---- static assert(SameTuple!(int, int).As!(int, int)); static assert(SameTuple!(int, "foo").As!(int, "foo")); static assert(!SameTuple!(int, "foo").As!("foo", int)); ---- */ template SameTuple(T...) { alias SameTupleImpl!T SameTuple; } template SameTupleImpl(T...) if (T.length == 1) { template As(U...) if (U.length == 1) { static if (is(typeof( T[0])) && is(typeof(U[0]))) { enum As = T[0] == U[0]; } else static if (!is(typeof( T)) && !is(typeof(U[0]))) { enum As = is(T[0] == U[0]); } else { enum As = false; } } template As(U...) if (U.length != 1) { enum As = false; } } template SameTupleImpl(T...) if (T.length != 1) { template As(U...) { static if (T.length != U.length) { enum As = false; } else static if (T.length == 0) { enum As = true; } else { enum As = SameTuple!(T[0]).As!(U[0]) && SameTuple!(T[1..$]).As!(U[1..$]); } } } unittest { static assert(SameTuple!(int, int).As!(int, int)); static assert(SameTuple!(float).As!(float)); static assert(SameTuple!("foo").As!("foo")); static assert(!SameTuple!("foo").As!("bar")); static assert(!SameTuple!(int ).As!("bar")); static assert(!SameTuple!(int ).As!(float)); static assert(SameTuple!(int, "foo").As!(int, "foo")); static assert(!SameTuple!(int, "foo").As!("foo", int)); static assert(SameTuple!().As!()); static assert(!SameTuple!(int).As!()); static assert(!SameTuple!().As!(int)); static assert(!SameTuple!("foo").As!()); static assert(!SameTuple!().As!("foo")); } -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------