public ClosedBiOpExpr(ExprI <P> a1, ExprI <P> a2, ClosedBiOpI <P> op) :
base(a1, a2, op)
{
}
public BiOpExpr(ExprI <P1> a1, ExprI <P2> a2, BiOpI <P1, P2, R> op) :
base(a1, a2, op)
{
}
/// <summary>
///
/// </summary>
/// <param name="arg">the vals: literal, or var</param>
/// <param name="op">the op: parameter type: P, return type:R </param>
public UnaOpCallVal(UnaOpI <A, R> op, ExprI <ValI <A> > arg)
: base(op, arg)
{
}
