Is there a TCL cmd to grep a particular line and awk a particular word

Question

Lets say below is something i've stored in a config variable in tcl.

#set config "configuration {
test_config {
    address 1.2.3.4:https
}
}"

Using tcl cmd, either grep or awk or string cmds, how do i take out "1.2.3.4:https" into a variable.

So when i use do something like below,

#puts $output
1.2.3.4:https

I know how it can be done in simple bash though

#echo $config | grep address | awk '{print $2}'
#1.2.3.4:https

Can someone please help in tcl. I tried to explore string functions, but they are not giving my required output and I'm learning about regexp now.

Answer 1

I'm sure Donal's suggestion is the more efficient: here's a procedural way to do it:

foreach line [split $config \n] {
    lassign [regexp -inline -all {\S+} $line] first second
    if {$first eq "address"} {
        set output $second
        break
    }
}