Enum member isIndexer


						
				enum isIndexer(Indexer)
				 = is(typeof((Indexer indexer)
{
import std.array : appender;
import std.traits : Unqual;
alias I = Indexer.IndexType;
alias V = Indexer.VertexType;
V[] outVertices;
immutable i = indexer.index(V.init, appender(outVertices));
static assert(isIntegral!(typeof(i)));
static assert(is(Unqual!(typeof(i)) == Indexer.IndexType));
}
));