hasOnErrorSet

Template to determine if hook provides function called when error is set.

template hasOnErrorSet (

Hook

) {

static if(__traits(hasMember, Hook, "onErrorSet"))

enum hasOnErrorSet;

static if(!(__traits(hasMember, Hook, "onErrorSet")))

enum hasOnErrorSet;

}

Members

Manifest constants

hasOnErrorSet enum hasOnErrorSet;: Undocumented in source.
hasOnErrorSet enum hasOnErrorSet;: Undocumented in source.

Examples

struct Hook {
    static string lastErr;
    static void onErrorSet(E)(auto ref E err) { lastErr = err; }
}

static assert(hasOnErrorSet!(Hook, string));
auto res = err!(int, Hook)("foo");
assert(res.hasError);
assert(Hook.lastErr == "foo");

hasOnErrorSet

Members

Manifest constants

Examples

Meta

Source