TIP #315: ADD PATHSEPARATOR TO TCL_PLATFORM ARRAY 
===================================================
 Version:      $Revision: 1.5 $
 Author:       Hai Vu <haivu2004_at_gmail.com>
 State:        Final
 Type:         Project
 Tcl-Version:  8.6
 Vote:         Done
 Created:      Friday, 04 April 2008
 URL:          https://tip.tcl-lang.org315.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 describes 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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