About true

Hi,

I was playing with true:

Supposes you inspect 'True basicNew'. It return a new instance of True
but the following don't work:

True basicNew ifTrue:[true]

Strange?

I have try to debug it and it fail on basicNew ??

I have inspect a CompiledMethod with this code and I saw:

21 <41> pushLit: True
22 <D0> send: basicNew
23 <98> jumpFalse: 25
24 <79> return: true
25 <78> returnSelf

That seems to be correct but at run time it don't do this ??
How come?

Thx

Math
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You mustn't create new instances of true/false/nil because the sole instance
of these class is known by the VM which use them for ifTrue:/ifFalse test
(with a test like ==).
Smalltalk is an open system, but there you reached the limits due to VM
optimizations.

For curiosity, i tried the expression with other dialects, VW and gst both
fail with mustBeBoolean error (True basicNew is neither recognized as a
Boolean), and stx does forbid use of basicNew on True. The latter protection
is maybe the right behavior.

Nicolas

Le Jeudi 03 Août 2006 20:54, Mathieu a écrit :
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