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TCL expr inside curly braces

jkang

I'm trying to run a repairPowerWire inside a specified area but I want to code up my script to be easily modified. So I've created variables for the location and size of various blocks and I want to run repairPowerWire on specified areas only.

The problem is, the -area option has to be followed by four coordinates in curly braces, e.g.:

repairPowerWire -area {0 0 10 10}

Well, the area I want to specify are contained in variables. Furthermore, I would like to calculate the top corner coordinates using an expr {}.

Since the {} braces are considered grouping in TCL, this effectively prevents me from putting expressions inside the -area option. Does anyone know a way to get around this? 

  • BobD

    Hi jkang,

    The curly braces are implying that the command is expecting a list containing 4 elements rather than flat space-separate values.

    Try passing the coordinates like this:

    repairPowerWire -area [list $llx $lly $urx $ury]

    Hope this helps,
    Bob

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