protected NumericalExpr(EExprTypeS typeS, EExprTypeT typet = EExprTypeT.None) : base(EExprTypeP.Numerical, typeS, typet) { }
public Expr(EExprTypeP typeP, EExprTypeS typeS = EExprTypeS.None, EExprTypeT typet = EExprTypeT.None) { TypeP = typeP; TypeS = typeS; TypeT = typet; }