[TV] ''apr 16 03 13:16''

I was wondering how to find matching brackets, or braces would be fine too, I guess even quotes would do, in *ANY* syntactically corrent tcl/tk script?

I mean preferably a way which is applicable to any code which can be fed to the interpreters, I mean complete general applicability, including comments.

I tried various things as in [bwise] amoung which some working methods, but I need a nice proc for a simple enough application, like the tml pages I want to generate html pages from a html + tcl extended page in a text editor.

While I'm asking, maybe there is a tcl coded tcl parser of some generality somewhere to be downloaded?



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   1. I use [frink] to do checking for brackets, braces, etc.

   1. I also use [TDK]'s procheck - formerly I used [TclPro]'s version.

   1. See also [bracechecker]

   1. A my favorite free editor [ASED Tcl/Tk IDE] will format braces, etc. to make errors standout  
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[RS]: ''[info] complete'' will bring you most of the way, I think:
"info complete command 
Returns 1 if command is a complete Tcl command in the sense of having no unclosed quotes, braces, brackets or array element names, If the command doesn't appear to be complete then 0 is returned. This command is typically used in line-oriented input environments to allow users to type in commands that span multiple lines; if the command isn't complete, the script can delay evaluating it until additional lines have been typed to complete the command. " (TclHelp)
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17apr03 [jcw] - A bit of end-of-week hacking led to:
  set a "{ a { b{ { c {d}}e } }} f {g h}"
  puts a=$a
  set b [regexp -all -indices -inline \{ $a]
  puts b=$b
  set e [regexp -all -indices -inline \} $a]
  puts e=$e

  set n [split [string repeat 0 [string length $a]] ""]
  foreach x $b { lset n [lindex $x 0] +1 }
  foreach x $e { lset n [lindex $x 0] -1 }
  puts n=$n

  set l 0
  set r {}
  foreach x $n { append r [incr l $x] }

  puts a=$a
  puts r=$r

  puts "matching prefix: [string range $a 0 [string first 0 $r]]"
Output:
  a={ a { b{ { c {d}}e } }} f {g h}
  b={0 0} {4 4} {7 7} {9 9} {13 13} {26 26}
  e={15 15} {16 16} {19 19} {21 21} {22 22} {30 30}
  n=+1 0 0 0 +1 0 0 +1 0 +1 0 0 0 +1 0 -1 -1 0 0 -1 0 -1 -1 0 0 0 +1 0 0 0 -1
  a={ a { b{ { c {d}}e } }} f {g h}
  r=1111222334444554333221000011110
  matching prefix: { a { b{ { c {d}}e } }}