IsCopyConstructed Class

Definition

Namespace:

System.Runtime.CompilerServices

Assembly:

System.Runtime.CompilerServices.VisualC.dll

Indicates that any copying of values of this type must use the copy constructor provided by the type. This class cannot be inherited.

public ref class IsCopyConstructed abstract sealed

public static class IsCopyConstructed

type IsCopyConstructed = class

Public Class IsCopyConstructed

Inheritance

Object

IsCopyConstructed

Remarks

Any type modified by the IsCopyConstructed class must implement a method named MarshalCopy that calls the native copy constructor.

Any native C++ type that is emitted into metadata with copy constructors needs to have those methods called by the marshaler when copying values across the marshaling boundary. The Microsoft C++ compiler modifies all native C++ types in method parameters and return types that have this modifier to trigger this behavior in the marshaling code.

Compilers emit custom modifiers within metadata to change the way that the just-in-time (JIT) compiler handles values when the default behavior is not appropriate. When the JIT compiler encounters a custom modifier, it handles the value in the way that the modifier specifies. Compilers can apply custom modifiers to methods, parameters, and return values. The JIT compiler must respond to required modifiers but can ignore optional modifiers.

You can emit custom modifiers into metadata using one of the following techniques:

• Using methods in the TypeBuilder class such as DefineMethod, DefineField, DefineConstructor, and DefineProperty.

• Generating a Microsoft intermediate language (MSIL) instruction file that contains calls to modopt and modreq, and assembling the file with the Ilasm.exe (IL Assembler).

• Using the unmanaged reflection API.