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public BindConvert ( |
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| binder | An instance of the |
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| Результат | ||
/// <inheritdoc />
/// <summary>
/// Performs the binding of the dynamic convert operation.
/// </summary>
/// <param name="target">The target of the dynamic convert operation.</param>
/// <param name="args">An array of arguments of the dynamic convert 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.Requires(args == null || args.Length == 0, nameof(args));
return(target.BindConvert(this));
}
/// <summary>
/// Performs the binding of the dynamic convert operation.
/// </summary>
/// <param name="target">The target of the dynamic convert operation.</param>
/// <param name="args">An array of arguments of the dynamic convert 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.Requires(args == null || args.Length == 0, nameof(args));
return target.BindConvert(this);
}
/// <summary>
/// Performs the binding of the dynamic convert operation.
/// </summary>
/// <param name="target">The target of the dynamic convert operation.</param>
/// <param name="args">An array of arguments of the dynamic convert 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.Requires(args == null || args.Length == 0, nameof(args));
return(target.BindConvert(this));
}
protected static bool TryConvert( ConvertBinder binder, DynamicMetaObject instance, out DynamicMetaObject result )
{
if ( instance.HasValue &&
instance.RuntimeType.IsValueType )
{
result = instance.BindConvert( binder );
return true;
}
if ( binder.Type.IsInterface )
{
Expression expression = Convert( instance.Expression, binder.Type );
result = new DynamicMetaObject( expression, BindingRestrictions.Empty, instance.Value );
result = result.BindConvert( binder );
return true;
}
if ( typeof (IDynamicMetaObjectProvider).IsAssignableFrom( instance.RuntimeType ) )
{
result = instance.BindConvert( binder );
return true;
}
result = null;
return false;
}
public static void TestMetaObject(DynamicMetaObject target, Type type, bool isValid = true)
{
ConvertBinder binder = new TestConvertBinder(type);
DynamicMetaObject result = target.BindConvert(binder);
Assert.IsNotNull(result);
// Convert expression
UnaryExpression expression = result.Expression as UnaryExpression;
Assert.IsNotNull(expression);
Assert.AreEqual<Type>(binder.Type, expression.Type);
if (isValid)
{
MethodCallExpression methodCallExp = expression.Operand as MethodCallExpression;
if (methodCallExp != null)
{
Assert.IsTrue(methodCallExp.Method.ToString().Contains("CastValue"));
}
else
{
ParameterExpression paramExpression = expression.Operand as ParameterExpression;
Assert.IsNotNull(paramExpression);
}
}
else
{
Expression<Action> throwExp = Expression.Lambda<Action>(Expression.Block(expression), new ParameterExpression[] { });
ExceptionTestHelper.ExpectException<InvalidCastException>(() => throwExp.Compile().Invoke());
}
}
public static void TestBindParams(DynamicMetaObject target)
{
ConvertBinder binder = new TestConvertBinder(typeof(int));
ExceptionTestHelper.ExpectException<ArgumentNullException>(() => { var result = target.BindConvert(null); });
}
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.Requires((args == null) || (args.Length == 0), "args");
return(target.BindConvert(this));
}
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
{
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.Requires((args == null) || (args.Length == 0), "args");
return target.BindConvert(this);
}
