[squeak-dev] Where does the compiler handle the "local bindings" of workspaces?
eduardoochs at gmail.com
Mon Feb 27 01:08:58 UTC 2023
first some context:
I was trying to put some blocks of executable notes in something
like the "Terse Guide to Squeak"... the Terse Guide is implemented
as a class called TerseGuideHelp, and I was working on a modified
copy of that class, that I called EdrxGuideHelp... but then I saw
that the window that shows the content of a topic in a help browser
treats local variables in a way that is different than the one in
workspaces - if I run "a := 42" in the window with the contents of a
topic I get a dialog window whose title is:
Unknown variable: a!
please correct, or cancel:
Now a more basic question. I sort of know where the "local variables"
of a workspace are stored... if I start with a single workspace and I
run this on it,
w := Workspace new.
and then I run this on the second workspace,
a := 2.
b := a + 3.
and then go back to the first workspace and "print it" this,
a Dictionary('a'->2 'b'->5 )
My first guess was that "do it"s and "print it"s in a workspace use
a dictionary of bindings, but "do it"s and "print it"s in the
mini-workspace of a help browser do not. I tried to understand
"real" workspaces first, and after setting a breakpoint in
TextEditor >> #printIt
and doing lots of single-steppings I arrived at this method,
TextEditor >> #evaluateSelectionAndDo:
that has this:
result := [
rcvr class evaluatorClass new
evaluate: self selectionAsStream
environment: (model environment ifNil: [Smalltalk globals])
ifFail: [self flash. ^ nil]
do: [ :ex | ex resume: true].
but when that code calls this method
Compiler >> #evaluate:in:to:environment:notifying:ifFail:logged:
the "rcvr class evaluatorClass new" is simply a "Compiler new", "self
selectionAsStream" is "a := 2. b := a + 3." as a stream, the ctxt and
the rcvr are nil, and the environment is just "Smalltalk"... where
does the dictionary of local bindings enter the story? Am I doing
something wrong in the debugger?...
Thanks in advance!
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Squeak-dev