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__FB_OPTION_BYVAL__keyword

Intrinsic define (macro value) set by the compiler

Intrinsic Defineskeyworddocumented

Syntax

__FB_OPTION_BYVAL__

Description


Indicates if parameters to a Function or Sub are passed by reference as with ByRef, or by value as with ByVal by default when the by value / by reference specifier is not explicitly stated.

__FB_OPTION_BYVAL__ is set to non-zero (-1) if by default parameters are passed value, and zero (0) if by default parameters are passed by reference.

The default for passing parameters by reference or by value is determined by the -lang command line option used during compilation or usage of Option ByVal in the source file.

Remarks

Differences from QB


  • New to FreeBASIC

See also


Example


#if( __FB_OPTION_BYVAL__ <> 0 )

  #error Option ByVal must Not be used With This source

#endif


Reference

  • Documented in KeyPgDdfboptionbyval.html