On Wednesday, 6 January 2016 at 14:17:51 UTC, anonymous wrote:
try return !haystack.empty && pred(haystack.front);
Might want to use std.exception.assumeWontThrow insteadreturn assumeWontThrow(!haystack.empty && pred(haystack.front));
http://dlang.org/phobos/std_exception.html#.assumeWontThrow