TIP #315: ADD PATHSEPARATOR TO TCL_PLATFORM ARRAY
===================================================
  Version:      $Revision: 1.1 $
  Author:       Hai Vu <haivu2004_at_gmail.com> 
  State:        Draft
  Type:         Project
  Tcl-Version:  8.6
  Vote:         Pending
  Created:      Friday, 04 April 2008
  URL:          http://www.tcl.tk/cgi-bin/tct/tip/315.html
  Post-History:

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  ABSTRACT
==========

  This TIP proposes a mechanism for determining the platform's path
  separator. The path separator is currently ":" in Unix and ";" in
  DOS/Windows.

  RATIONALE
===========

  Under Windows, the PATH environment variable consists of many paths,
  separated by semicolons (";"). Meanwhile, Unix uses colon to separate
  the paths (":"). Scripts that need to work on both platforms while
  parsing platform-specific PATH-like environment variables (PATH is just
  the most common of these) currently need to contain the mapping from
  platform-type to separator, but this is not especially flexible and
  some script authors are also inclined to forget about this particular
  difference.

  Thus, to aid portability, this TIP proposes adding an element to the
  *tcl_platform* array, *pathSeparator*, which descrives the path
  separator for the current platform.

  EXAMPLE USAGE
===============

  The following example prints each component of the PATH environment on
  a separate line:

    set pathList [split $env(PATH) $tcl_platform(pathSeparator)]
    foreach path $pathList {
        puts $pathList
    }

  Alternatively:

    puts [string map [list $tcl_platform(pathSeparator) \n] $env(PATH)]

  COPYRIGHT
===========

  This document has been placed in the public domain.

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