METHODINFO directive (Delphi)

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Type	Switch
Syntax	{$METHODINFO ON} or {$METHODINFO OFF}
Default	{$METHODINFO OFF}
Scope	Local

The $METHODINFO switch directive is only effective when run-time type information (RTTI) has been turned on with the {$TYPEINFO ON} switch. In the {$TYPEINFO ON} state, the $METHODINFO directive controls the generation of more detailed method descriptors in the RTTI for methods in an interface. Though {$TYPEINFO ON} will cause some RTTI to be generated for published methods, the level of information is limited. The $METHODINFO directive generates much more detailed (and much larger) RTTI for methods, which describes how the parameters of the method should be passed on the stack and/or in registers.

There is seldom, if ever, any need for an application to directly use the $METHODINFO compiler switch. The method information adds considerable size to the executable file, and is not recommended for general use.

Note: The Delphi compiler's Win32 web service support code uses method information descriptors in order to pass parameters received in a network packet to the target method. {$METHODINFO ON} is used only for web service interface types.

See Also

• Run-Time Type Information (Delphi)
• Understanding Invokable Interfaces