FEmitter::Extern

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Description

Emits an extern instruction based on a user-specified definition struct. An extern instruction is how you can extend MIR capabilities from the outside. An extern instruction implements a well-defined interface (specified by the MIR::CExternDefinition concept) and provides a way to build functionality not natively offered by the MIR instruction set. For example, material-specific rendering features are implemented through externs rather than by extending MIR To emit an extern instruction, you need to provide a "definition", meaning a concrete POD struct that implements the extern concept. Parameters:

• `DefinitionPrototype_ is an instance of the TDefinition struct you provide. This is moved into the emitted extern instruction's own buffer.
• With Arguments_, you can specify zero or more [FValueRef](API\Runtime\Engine\FValueRef) arguments to provide to the extern instruction. For more usage and general information, see MIR::CExternDefinition_.

template<CExternDefinition TDefinition, typename... TArguments>  
FValueRef Extern  
(  
    TDefinition DefinitionPrototype,  
    TArguments... Arguments  
)  
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