I guess you can circumvent the inlining by using perform (and selecting the code with "debug it" from the menu) as in:

true perform: #ifTrue: with: [ 3 inspect ]

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From: Nicolas Passerini <npasserini@gmail.com>
To: Any question about pharo is welcome <pharo-users@lists.pharo.org>
Sent: Monday, October 31, 2016 9:32 AM
Subject: Re: [Pharo-users] How does Boolean ifTrue work?

Well, in fact Boolean class has no instances, the boolean value true is an instance of True class, you should look at the ifTrue: methods in the subclasses of Boolean True and False.

But also, ifTrue: expressions are inlined, as the comment says in the code you posted. So I think that all this ifTrue: methods are never actually executed.

2016-10-31 14:17 GMT+01:00 CodeDmitry <dimamakhnin@gmail.com>:

I am looking at

ifTrue: alternativeBlock
"If the receiver is false (i.e., the condition is false), then the value is
the
false alternative, which is nil. Otherwise answer the result of evaluating
the argument, alternativeBlock. Create an error notification if the
receiver is nonBoolean. Execution does not actually reach here because
the expression is compiled in-line."

self subclassResponsibility

In order to perform the block, ifTrue must somehow end up evaluating the
block, but this code only sends a subclassResponsibility message to itself
and implicitly returns itself.

Where does the block actually get evaluated?

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