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Tcl: Tcl Command Execute by Variable

Alexander Ross • • 2 min read
Tcl: Tcl Command Execute by Variable

I am a beginner with tcl. I am trying to use primetime execute command, but it can't accept variable. For example:

set var "get_timing_paths -rise_from A -rise_to B"
set path0001 [$var]

But it doesn't work. The things I want to do is

set path0001 [get_timing_paths -rise_from A -rise_to B]

but I need to seperate it.

Thank you for your answer.

3

2 Answers

If you're using Tcl/Tk 8.5 or newer, it'd be better to use the list expansion operator {*} instead of eval:

set var "get_timing_paths -rise_from A -rise_to B"
set path0001 [{*}$var]

It's a bit faster and safer.

1

Just add eval while calling the command. 

set path0001 [eval $var]

Reference : eval

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Alexander Ross
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Alexander Ross

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.