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Tcl Switch Weirdness

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  • April 12, 2007 at 4:47 pm #49206
    Max Drown (Infor)
    Keymaster

      Comment with one word outside a block in the switch …

      Code:

      set mode “start”

      switch -exact — $mode {
         start {
             puts “start mode”
             return “”   ;# Nothing specific
         }
             # comment
      }

      … No errors.

      Comment with 2+ words outside a block in the switch …

      Code:

      set mode “start”

      switch -exact — $mode {
         start {
             puts “start mode”
             return “”   ;# Nothing specific
         }
             # a comment
      }

      … generates an error …

      Code:

      extra switch pattern with no body, this may be due to a comment incorrectly placed outside of a switch body – see the “switch” documentation
         while executing
      “switch -exact — $mode {
             start {
                 puts “start mode”
                 return “”   ;# Nothing specific
             }
                 # a comment
      …”
         (file “tmp.tcl” line 3)

      . Can anyone explain what is happening?

      -- Max Drown (Infor)

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      • April 12, 2007 at 4:58 pm #61100
        Max Drown (Infor)
        Keymaster

          Oh. I see … *blinks*

          Code:

          set mode “#”
          switch -exact $mode {
             1 { # do nothing }
             2 { # do nothing }
             3 { # do nothing }
             # { puts “this is NOT a comment!” }
             default { # do nothing }
          }

          -- Max Drown (Infor)

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