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Template std.meta.templateOr
Combines several template predicates using logical OR, i.e. constructs a new predicate which evaluates to true for a given input T if and only at least one of the passed predicates is true for T.
template templateOr(Preds...)
;
The predicates are evaluated from left to right, aborting evaluation in a short-cut manner if a true result is encountered, in which case the latter instantiations do not need to compile.
Example
import std .traits : isPointer, isUnsigned;
alias isPtrOrUnsigned = templateOr!(isPointer, isUnsigned);
static assert( isPtrOrUnsigned!uint && isPtrOrUnsigned!(short*));
static assert(!isPtrOrUnsigned!int && !isPtrOrUnsigned!(string));
// An empty sequence of predicates never yields true.
alias alwaysFalse = templateOr!();
static assert(!alwaysFalse!int);
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