public void AssignmentAnalyzer_Quote()
{
var x = Expression.Parameter(typeof(int));
var b =
Expression.Block(
new[] { x },
Expression.Quote(Expression.Lambda <Func <int> >(x))
);
var analyze = new AssignmentAnalyzer(b.Variables);
var res = analyze.Visit(b.Expressions);
Assert.AreSame(b.Expressions, res);
Assert.AreEqual(0, analyze.Unassigned.Count);
}
public void AssignmentAnalyzer_RuntimeVariables()
{
var x = Expression.Parameter(typeof(int));
var b =
Expression.Block(
new[] { x },
Expression.RuntimeVariables(x)
);
var analyze = new AssignmentAnalyzer(b.Variables);
var res = analyze.Visit(b.Expressions);
Assert.AreSame(b.Expressions, res);
Assert.AreEqual(0, analyze.Unassigned.Count);
}
public void AssignmentAnalyzer_Unassigned()
{
var x = Expression.Parameter(typeof(int));
var b =
Expression.Block(
new[] { x },
x
);
var analyze = new AssignmentAnalyzer(b.Variables);
var res = analyze.Visit(b.Expressions);
Assert.AreSame(b.Expressions, res);
Assert.IsTrue(new[] { x }.SequenceEqual(analyze.Unassigned));
}
public void AssignmentAnalyzer_Assign()
{
var x = Expression.Parameter(typeof(int));
var b =
Expression.Block(
new[] { x },
Expression.Constant(0),
Expression.Assign(x, Expression.Constant(1)),
Expression.Constant(2)
);
var analyze = new AssignmentAnalyzer(b.Variables);
var res = analyze.Visit(b.Expressions);
Assert.AreSame(b.Expressions, res);
Assert.AreEqual(0, analyze.Unassigned.Count);
}
public void AssignmentAnalyzer_ByRef()
{
var read = typeof(Volatile).GetMethod(nameof(Volatile.Read), new[] { typeof(int).MakeByRefType() });
var x = Expression.Parameter(typeof(int));
var b =
Expression.Block(
new[] { x },
Expression.Constant(0),
Expression.Call(read, x),
Expression.Constant(2)
);
var analyze = new AssignmentAnalyzer(b.Variables);
var res = analyze.Visit(b.Expressions);
Assert.AreSame(b.Expressions, res);
Assert.AreEqual(0, analyze.Unassigned.Count);
}