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)
};
ExceptionHelper.Throws <ArgumentNullException>(() => { var result = target.BindGetIndex(null, indexes); });
ExceptionHelper.Throws <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[] { });
ExceptionHelper.Throws <ArgumentException>(() => { expression.Compile().Invoke(); }, NonSingleNonNullIndexNotSupported);
}
}
/// <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));
}
private static object GetIndex(this DynamicMetaObject target, object[] indices)
{
var paramNames = Enumerable.Range(0, indices.Length).Select(index => "a" + index).ToArray();
var paramExprs = paramNames.Select((paramName, index) => Expression.Parameter(GetParamTypeForArg(indices[index]), paramName)).ToArray();
var parameters = paramExprs.Select(paramExpr => new DynamicMetaObject(paramExpr, BindingRestrictions.Empty)).ToArray();
var bindResult = target.BindGetIndex(new DynamicGetIndexBinder(paramNames), parameters);
var block = Expression.Block(Expression.Label(CallSiteBinder.UpdateLabel), bindResult.Expression);
return(Invoke(block, paramExprs, indices));
}
/// <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 (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)
{
Requires.NotNull(binder, nameof(binder));
Requires.NotNull(instance, nameof(instance));
Requires.NotNull(args, nameof(args));
if (TryGetMetaObjectInvoke(ref instance))
{
result = instance.BindGetIndex(binder, args);
return(true);
}
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)
{
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);
}
}
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 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 override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes)
{
return(AddRestrictions(_metaForwardee.BindGetIndex(binder, indexes)));
}
/// <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);
}
public override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes)
{
return(scriptItem.PostProcessBindResult(metaDynamic.BindGetIndex(binder, indexes)));
}
public override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes) => _innerMetaObject.BindGetIndex(binder, indexes);
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 override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes)
{
return(binder.FallbackGetIndex(_baseMetaObject,
indexes,
AddTypeRestrictions(_metaObject.BindGetIndex(binder, indexes))));
}
public override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes)
{
return(metaObject.BindGetIndex(binder, indexes));
}
