if



if( boolean, trueFunc, falseFunc)



see also: Control-Structures


the functions will be inlined, which plucks the code from the functions and uses a more efficient jump statement.


{

if( 6 == 9,{

"hello".postln;

},{

"hello".postln;

})

}.def.dumpByteCodes


BYTECODES: (18)

  0   FE 06    PushPosInt 6

  2   FE 09    PushPosInt 9

  4   E6       SendSpecialBinaryArithMsg '=='

  5   F8 00 06 JumpIfFalse 6  (14)

  8   42       PushLiteral "hello"

  9   A1 00    SendMsg 'postln'

 11   FC 00 03 JumpFwd 3  (17)

 14   41       PushLiteral "hello"

 15   A1 00    SendMsg 'postln'

 17   F2       BlockReturn

a FunctionDef in closed FunctionDef






failure to inline due to variable declarations

{


if( 6 == 9,{

var notHere;

"hello".postln;

},{

"hello".postln;

})


}.def.dumpByteCodes


WARNING: FunctionDef contains variable declarations and so will not be inlined.

   in file 'selected text'

   line 4 char 14 :

  var notHere;•

  "hello".postln;

-----------------------------------

BYTECODES: (12)

  0   FE 06    PushPosInt 6

  2   FE 09    PushPosInt 9

  4   E6       SendSpecialBinaryArithMsg '=='

  5   04 00    PushLiteralX instance of FunctionDef in closed FunctionDef

  7   04 01    PushLiteralX instance of FunctionDef in closed FunctionDef

  9   C3 0B    SendSpecialMsg 'if'

 11   F2       BlockReturn

a FunctionDef in closed FunctionDef






{

if( 6 == 9,{

"hello".postln;

},{

"hello".postln;

})

}.def.dumpByteCodes


BYTECODES: (18)

  0   FE 06    PushPosInt 6

  2   FE 09    PushPosInt 9

  4   E6       SendSpecialBinaryArithMsg '=='

  5   F8 00 06 JumpIfFalse 6  (14)

  8   42       PushLiteral "hello"

  9   A1 00    SendMsg 'postln'

 11   FC 00 03 JumpFwd 3  (17)

 14   41       PushLiteral "hello"

 15   A1 00    SendMsg 'postln'

 17   F2       BlockReturn

a FunctionDef in closed FunctionDef




UGens can also use if


the condition ugen is 0 / 1 


(

{

if( LFNoise1.kr(1.0,0.5,0.5) , SinOsc.ar, Saw.ar )

}.play

)





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