public void VarPattern_Update()
{
var t = Expression.Variable(typeof(int));
var p = CSharpPattern.Var(CSharpPattern.ObjectPatternInfo(CSharpPattern.PatternInfo(typeof(int), typeof(int)), variable: t));
Assert.AreSame(p, p.Update(t));
var u = Expression.Variable(typeof(int));
var q = p.Update(u);
Assert.AreNotSame(p, q);
Assert.AreSame(u, q.Variable);
}
public void VarPattern_ArgumentChecking()
{
// null
AssertEx.Throws <ArgumentNullException>(() => CSharpPattern.Var(info: null));
AssertEx.Throws <ArgumentNullException>(() => CSharpPattern.Var(variable: null));
// by-ref type
AssertEx.Throws <ArgumentException>(() => CSharpPattern.Var(variable: Expression.Variable(typeof(int).MakeByRefType())));
AssertEx.Throws <ArgumentException>(() => CSharpPattern.Var(info: null, variable: Expression.Variable(typeof(int).MakeByRefType())));
// invalid typing
AssertEx.Throws <ArgumentException>(() => CSharpPattern.Var(CSharpPattern.ObjectPatternInfo(CSharpPattern.PatternInfo(typeof(object), typeof(int)), variable: null)));
AssertEx.Throws <ArgumentException>(() => CSharpPattern.Var(CSharpPattern.ObjectPatternInfo(CSharpPattern.PatternInfo(typeof(int), typeof(int)), Expression.Variable(typeof(long)))));
}