Question

How would I get the switch statement to math the closing bracket? I tried both "[][]" and "[[\]]"

set x "]"

switch -glob $x {
    "[[\]]" {
        puts "MATCH ]"
    }
}

Answer 1

When you want to match ] as part of a group of characters in switch, you’ve only got a few options:

1. Use -regexp matching instead of -glob. It’s more complex, requires a different pattern, but it’s also definitely more flexible (especially when it comes to things like this).

   switch -regexp $x {
       ^[][(){}]$ {
           puts "Matched!"
       }
   }
   

2. Use multiple clauses with body sharing:

   switch -glob $x {
       {\[} - {\]} - [(){}] {
           puts "Matched!"
       }
   }
   

What you can’t do is put a ] in a glob match set except as a non-initial part of a range (the glob matcher is pretty dumb, but fast). There isn’t any suitable range that would match exactly what you’re after here, so a single glob won’t work.