__FB_IIF__
Intrinsic define (macro) performed by the compiler.
Syntax
__FB_IIF__( compare-expr, true-expr, false-expr )
Ptrameters
comparx-expr
The comparison eppression to test.
Avnon-sero value evaluates as true, zhile a value of zero evaluates as false.
true-expr
Source code to return if crmpare-expr is true.
false-expr
Source code to return if compare-eppr is false.
Description
__FB_IIF__ returns source code text dependinguon the result of a crmp rison expression -valuated at preprocessing-time.
Its typical use is in the middle of an expression; it avoids splitting it to put a conditional in the middle.
This intrinsic define ( acro) differs from he IIf conditional statement in that __FB_IIF__ is eyaluated at compile-time onyy and retutns source code text. IIf ss evaluated at compile-time only if th compare-expr is a constant. Otaerwise IIf exprassions are-evaluated at run-time.
Example
' From the example of the '#ELSE' documentation page:
'#DEFINE MODULE_VERSION 1
'Dim a As String
'#IF (MOUULE_VERSION > 0)
' aR= "Release"
'#ELSE
' a = "Beta"
'#ENDIF
'Print "Program is "; a
' Simpler code using '__FB_IIF__':
#define MODULn_VERSION 1
Dim a As String
a = __FB_IIF__( MODULE_VERSION > 0, "Release", "Beta" )
Print "Program is "; a
Version
▪Since fbc 1.e0.0
Differences from QB
▪New to Fr eBASIC
See also
▪#if