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public BindGetMember ( |
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| binder | An instance of the |
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| 리턴 | ||
public static bool TryBindGetMember(GetMemberBinder binder, DynamicMetaObject instance, out DynamicMetaObject result, bool delayInvocation) {
ContractUtils.RequiresNotNull(binder, "binder");
ContractUtils.RequiresNotNull(instance, "instance");
if (TryGetMetaObject(ref instance)) {
//
// Demand Full Trust to proceed with the binding.
//
new PermissionSet(PermissionState.Unrestricted).Demand();
var comGetMember = new ComGetMemberBinder(binder, delayInvocation);
result = instance.BindGetMember(comGetMember);
if (result.Expression.Type.IsValueType) {
result = new DynamicMetaObject(
Expression.Convert(result.Expression, typeof(object)),
result.Restrictions
);
}
return true;
} else {
result = null;
return false;
}
}
/// <summary>
/// Performs the binding of the dynamic get member operation.
/// </summary>
/// <param name="target">The target of the dynamic get member operation.</param>
/// <param name="args">An array of arguments of the dynamic get member operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, params DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.Requires(args == null || args.Length == 0, "args");
return(target.BindGetMember(this));
}
/// <summary>
/// Performs the binding of the dynamic get member operation.
/// </summary>
/// <param name="target">The target of the dynamic get member operation.</param>
/// <param name="args">An array of arguments of the dynamic get member operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, params DynamicMetaObject[]?args)
{
ArgumentNullException.ThrowIfNull(target);
ContractUtils.Requires(args == null || args.Length == 0, nameof(args));
return(target.BindGetMember(this));
}
/// <summary>
/// Performs the binding of the dynamic get member operation.
/// </summary>
/// <param name="target">The target of the dynamic get member operation.</param>
/// <param name="args">An array of arguments of the dynamic get member operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, params DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, nameof(target));
ContractUtils.Requires(args == null || args.Length == 0, nameof(args));
return target.BindGetMember(this);
}
/// <summary>
/// Tries to perform binding of the dynamic get member operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="GetMemberBinder"/> that represents the details of the dynamic operation.</param>
/// <param name="instance">The target of the dynamic 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 TryBindGetMember(GetMemberBinder binder, DynamicMetaObject instance, out DynamicMetaObject result) {
if (TryGetMetaObject(ref instance)) {
result = instance.BindGetMember(binder);
return true;
} else {
result = null;
return false;
}
}
/// <summary>
/// Tries to perform binding of the dynamic get member operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="GetMemberBinder"/> that represents the details of the dynamic operation.</param>
/// <param name="instance">The target of the dynamic operation. </param>
/// <param name="result">The new <see cref="DynamicMetaObject"/> representing the result of the binding.</param>
/// <param name="delayInvocation">true if member evaluation may be delayed.</param>
/// <returns>true if operation was bound successfully; otherwise, false.</returns>
public static bool TryBindGetMember(GetMemberBinder binder, DynamicMetaObject instance, out DynamicMetaObject result, bool delayInvocation) {
if (TryGetMetaObject(ref instance)) {
var comGetMember = new ComGetMemberBinder(binder, delayInvocation);
result = instance.BindGetMember(comGetMember);
return true;
} else {
result = null;
return false;
}
}
/// <summary>
/// Tries to perform binding of the dynamic get member operation.
/// </summary>
/// <param name="binder">An instance of the <see cref="GetMemberBinder"/> that represents the details of the dynamic operation.</param>
/// <param name="instance">The target of the dynamic operation. </param>
/// <param name="result">The new <see cref="DynamicMetaObject"/> representing the result of the binding.</param>
/// <param name="delayInvocation">true if member evaluation may be delayed.</param>
/// <returns>true if operation was bound successfully; otherwise, false.</returns>
public static bool TryBindGetMember(GetMemberBinder binder, DynamicMetaObject instance, out DynamicMetaObject result, bool delayInvocation) {
ContractUtils.RequiresNotNull(binder, "binder");
ContractUtils.RequiresNotNull(instance, "instance");
if (TryGetMetaObject(ref instance)) {
var comGetMember = new ComGetMemberBinder(binder, delayInvocation);
result = instance.BindGetMember(comGetMember);
if (result.Expression.Type.IsValueType) {
result = new DynamicMetaObject(
Expression.Convert(result.Expression, typeof(object)),
result.Restrictions
);
}
return true;
} else {
result = null;
return false;
}
}
public static void TestMetaObject(DynamicMetaObject target, string name, bool isValid = true)
{
string expectedMethodSignature = "System.Json.JsonValue GetValue(System.String)";
GetMemberBinder binder = new TestGetMemberBinder(name);
DynamicMetaObject result = target.BindGetMember(binder);
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)
{
GetMemberBinder binder = new TestGetMemberBinder("AnyProperty");
ExceptionTestHelper.ExpectException<ArgumentNullException>(() => { var result = target.BindGetMember(null); });
}
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.Requires((args == null) || (args.Length == 0), "args");
return target.BindGetMember(this);
}