TFunctionWithContext

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Type that adapts a callable into a function pointer with a context pointer.

This does not take ownership of the callable. If constructed with a lambda, it is only valid until the lambda goes out of scope. Use TFunction to take ownership of the lambda.

This behaves like a nullable TFunctionRef with the addition of accessors to pass on the function and context pointers to implementation functions. This tends to generate more efficient code than when passing a TFunctionRef or a TFunctionWithContext either by value or by reference.

A function taking a string and float and returning int32 usage might be:

void ParseLines(FStringView View, void (Visitor)(void Context, FStringView Line), void* Context); inline void ParseLines(FStringView View, TFunctionWithContext Visitor) { ParseLines(View, Visitor.GetFunction(), Visitor.GetContext()); }

The example ParseLines can be called as:

ParseLines(Input, FStringView Line { PrintLine(Line); });

Syntax

template<typename FunctionType>  
class TFunctionWithContext  
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template<typename FunctionType> class TFunctionWithContext

Class Specializations