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public BindGetIndex ( |
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| binder | An instance of the |
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| indexes | An array of |
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| 리턴 | ||
/// <summary>
/// Performs the binding of the dynamic get index operation.
/// </summary>
/// <param name="target">The target of the dynamic get index operation.</param>
/// <param name="args">An array of arguments of the dynamic get index operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.RequiresNotNullItems(args, "args");
return(target.BindGetIndex(this, args));
}
/// <summary>
/// Performs the binding of the dynamic get index operation.
/// </summary>
/// <param name="target">The target of the dynamic get index operation.</param>
/// <param name="args">An array of arguments of the dynamic get index operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
{
ArgumentNullException.ThrowIfNull(target);
ContractUtils.RequiresNotNullItems(args, nameof(args));
return(target.BindGetIndex(this, args));
}
/// <summary>
/// Performs the binding of the dynamic get index operation.
/// </summary>
/// <param name="target">The target of the dynamic get index operation.</param>
/// <param name="args">An array of arguments of the dynamic get index operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, nameof(target));
ContractUtils.RequiresNotNullItems(args, nameof(args));
return target.BindGetIndex(this, args);
}
public override DynamicMetaObject/*!*/ FallbackOperation(DynamicMetaObject target, DynamicMetaObject/*!*/[]/*!*/ args, DynamicMetaObject onBindingError) {
// TODO: until we use the real GetIndex and SetIndex binders, we
// need to do this for COM interop
if (Operation == "GetItem") {
return target.BindGetIndex(new GetIndexAdapter(this), args);
}
if (Operation == "SetItem") {
DynamicMetaObject[] indexes = ArrayUtils.RemoveLast(args);
DynamicMetaObject value = args[args.Length - 1];
return target.BindSetIndex(new SetIndexAdapter(this), indexes, value);
}
return PythonProtocol.Operation(this, ArrayUtils.Insert(target, args));
}
public static bool TryBindGetIndex(GetIndexBinder binder, DynamicMetaObject instance, DynamicMetaObject[] args, out DynamicMetaObject result) {
ContractUtils.RequiresNotNull(binder, "binder");
ContractUtils.RequiresNotNull(instance, "instance");
ContractUtils.RequiresNotNull(args, "args");
if (TryGetMetaObject(ref instance)) {
//
// Demand Full Trust to proceed with the binding.
//
new PermissionSet(PermissionState.Unrestricted).Demand();
result = instance.BindGetIndex(binder, args);
return true;
} else {
result = null;
return false;
}
}
public static void TestMetaObject(DynamicMetaObject target, int index, bool isValid = true)
{
string expectedMethodSignature = "System.Json.JsonValue GetValue(Int32)";
GetIndexBinder binder = new TestGetIndexBinder();
DynamicMetaObject[] indexes = { new DynamicMetaObject(Expression.Parameter(typeof(int)), BindingRestrictions.Empty, index) };
DynamicMetaObject result = target.BindGetIndex(binder, indexes);
Assert.IsNotNull(result);
MethodCallExpression expression = result.Expression as MethodCallExpression;
Assert.IsNotNull(expression);
Assert.AreEqual<string>(expectedMethodSignature, expression.Method.ToString());
}
public static void TestBindParams(DynamicMetaObject target)
{
GetIndexBinder binder = new TestGetIndexBinder();
Expression typeExpression = Expression.Parameter(typeof(int));
DynamicMetaObject[] indexes =
{
new DynamicMetaObject(typeExpression, BindingRestrictions.Empty, 0),
new DynamicMetaObject(typeExpression, BindingRestrictions.Empty, 1),
new DynamicMetaObject(typeExpression, BindingRestrictions.Empty, 2)
};
ExceptionTestHelper.ExpectException<ArgumentNullException>(() => { var result = target.BindGetIndex(null, indexes); });
ExceptionTestHelper.ExpectException<ArgumentNullException>(() => { var result = target.BindGetIndex(binder, null); });
DynamicMetaObject[][] invalidIndexesParam =
{
indexes,
new DynamicMetaObject[] { new DynamicMetaObject(typeExpression, BindingRestrictions.Empty, null) },
new DynamicMetaObject[] { null },
new DynamicMetaObject[] { }
};
foreach (DynamicMetaObject[] indexesParam in invalidIndexesParam)
{
DynamicMetaObject metaObj = target.BindGetIndex(binder, indexesParam);
Expression<Action> expression = Expression.Lambda<Action>(Expression.Block(metaObj.Expression), new ParameterExpression[] { });
ExceptionTestHelper.ExpectException<ArgumentException>(() => { expression.Compile().Invoke(); }, NonSingleNonNullIndexNotSupported);
}
}
/// <summary>
/// Tries to perform binding of the dynamic get index operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="GetIndexBinder"/> that represents the details of the dynamic operation.</param>
/// <param name="instance">The target of the dynamic operation. </param>
/// <param name="args">An array of <see cref="DynamicMetaObject"/> instances - arguments to the invoke member operation.</param>
/// <param name="result">The new <see cref="DynamicMetaObject"/> representing the result of the binding.</param>
/// <returns>true if operation was bound successfully; otherwise, false.</returns>
public static bool TryBindGetIndex(GetIndexBinder binder, DynamicMetaObject instance, DynamicMetaObject[] args, out DynamicMetaObject result) {
ContractUtils.RequiresNotNull(binder, "binder");
ContractUtils.RequiresNotNull(instance, "instance");
ContractUtils.RequiresNotNull(args, "args");
if (TryGetMetaObjectInvoke(ref instance)) {
result = instance.BindGetIndex(binder, args);
return true;
} else {
result = null;
return false;
}
}
/// <summary>
/// Tries to perform binding of the dynamic get index operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="GetIndexBinder"/> that represents the details of the dynamic operation.</param>
/// <param name="instance">The target of the dynamic operation. </param>
/// <param name="args">An array of <see cref="DynamicMetaObject"/> instances - arguments to the invoke member operation.</param>
/// <param name="result">The new <see cref="DynamicMetaObject"/> representing the result of the binding.</param>
/// <returns>true if operation was bound successfully; otherwise, false.</returns>
public static bool TryBindGetIndex(GetIndexBinder binder, DynamicMetaObject instance, DynamicMetaObject[] args, out DynamicMetaObject result) {
if (TryGetMetaObject(ref instance)) {
result = instance.BindGetIndex(binder, args);
return true;
} else {
result = null;
return false;
}
}
