/// <summary>
/// Creates a list of hashers and comparers.
/// Notice that the number of comparers is equal to the number of hashers.
/// Also, they must be of the same generic type.
/// </summary>
protected void CreateHashersAndComparers(out ExpressionComparer[] comparers, out ExpressionHasher[] hashers)
{
comparers = new ExpressionComparer[this.hashes.Length];
hashers = new ExpressionHasher[this.hashes.Length];
for (int i = 0; i < this.hashes.Length; i++)
{
comparers[i] = (ExpressionComparer.Factory(this.hashes[i], true, false)); // hash, ascending, no cache.
hashers[i] = (ExpressionHasher.Factory(this.hashes[i]));
}
}
/// <summary>
/// Creates copies of the given comparers (the internal expressions are not copies).
/// </summary>
public static ExpressionComparer[] CloneHard(this ExpressionComparer[] comparers, bool cacheResults)
{
var newComparers = new ExpressionComparer[comparers.Length];
for (int i = 0; i < newComparers.Length; i++)
{
newComparers[i] = comparers[i].Clone(cacheResults);
}
return(newComparers);
}