/// <summary>
/// And operation of two Zen List of bool.
/// </summary>
/// <param name="ma">list a.</param>
/// <param name="mb">list b.</param>
/// <returns>list of a and b.</returns>
public static Zen <IList <bool> > And(this Zen <IList <bool> > ma, Zen <IList <bool> > mb)
{
var index = mb.Length();
var ret = ma.Select(_ => Language.And(ma.At(index -= 1).Value(), mb.At(index).Value()));
return(ret);
}
/// <summary>
/// A pairwise invariant for a list of elements.
/// </summary>
/// <param name="list">The list.</param>
/// <param name="f">The pairwise invariant.</param>
/// <returns>A zen value for the invariant.</returns>
internal static Zen <bool> PairwiseInvariant <T>(Zen <IList <T> > list, Func <Zen <T>, Zen <T>, Zen <bool> > f)
{
return(list.Case(
empty: true,
cons: (hd1, tl1) => tl1.Case(
empty: true,
cons: (hd2, tl2) => Language.And(f(hd1, hd2), PairwiseInvariant(tl1, f)))));
}
public void TestAndException2()
{
Language.And(true, null);
}
public void TestAndException1()
{
Language.And(null, true);
}
/// <summary>
/// Gets a Zen expression from a path constraint.
/// </summary>
/// <returns>The Zen expression.</returns>
public Zen <bool> GetExpr()
{
return(Language.And(this.Conjuncts.ToArray()));
}
