Re: Tcl C extn - Scoping in extended cmds - how to?

On Jun 28, 12:46 pm, "MartinLemburg@UGS" <martin.lemburg....@xxxxxxx>
wrote:

so far as I know, no tcl command (C function registered as tcl
command) creates a call-stack-scope on its execution.


On the contrary, every proc starts by creating a stack frame. Only
certain specific ones (like control structures) immediately pop back
from it through [uplevel].

If you need just that fresh frame and nothing else:

proc separate_frame __code {eval $__code}

set x 1
separate_frame {
set x 2
puts $x
}
puts $x

=>
2
1

I guess the OP could generalize this to his domain, with procs doing
real things in addition to the frame.

Now as to whether such style should be encouraged, I'm tempted to
agree with you.
But I'll leave it to the OP to decide if it makes sense in his problem
domain.

-Alex

.

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