public void nestedNegs(int depth)
{
var pair = GetVarAndIdExpr("foo", BasicType.Int);
var variable = pair.Item1;
var id = pair.Item2;
var cfb = GetConstantFoldingBuilder();
Expr result = id;
for (int i = 0; i < depth; ++i)
{
result = cfb.Neg(result);
CheckIsInt(result);
}
if (depth % 2 == 0)
{
Assert.AreSame(id, result);
}
else
{
var asNeg = ExprUtil.AsNeg(result);
Assert.IsNotNull(asNeg);
Assert.AreSame(id, asNeg.Args[0]);
}
}
public void LhsRealZero()
{
var cfb = GetConstantFoldingBuilder();
var x = GetVarAndIdExpr("x", BasicType.Real).Item2;
var result = cfb.Sub(cfb.ConstantReal("0.0"), x);
CheckIsReal(result);
var asNeg = ExprUtil.AsNeg(result);
Assert.IsNotNull(asNeg);
Assert.AreSame(x, asNeg.Args[0]);
}
public void noFold()
{
var pair = GetSimpleAndConstantFoldingBuilder();
var sb = pair.Item1;
var cfb = pair.Item2;
var id = GetVarAndIdExpr("foo", BasicType.Int).Item2;
var foldedResult = cfb.Neg(id);
var simpleResult = sb.Neg(id);
CheckIsInt(foldedResult);
CheckIsInt(simpleResult);
Assert.AreEqual(simpleResult, foldedResult);
var asNeg = ExprUtil.AsNeg(foldedResult);
Assert.IsNotNull(asNeg);
Assert.AreSame(id, asNeg.Args[0]);
}