TIP #254: NEW TYPES FOR TCL_LINKVAR 
=====================================
 Version:      $Revision: 1.6 $
 Author:       Rene Meyer <rene.meyer_at_sturmit.de>
 State:        Final
 Type:         Project
 Tcl-Version:  8.5
 Vote:         Done
 Created:      Thursday, 21 July 2005
 URL:          https://tip.tcl-lang.org254.html
 Post-History: 

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 ABSTRACT 
==========

 Currently only a limited set of types of C variable may be linked to 
 using Tcl_LinkVar. This TIP proposes extending this to cover all the 
 basic numeric C types. 

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

 With the current implementation it is not possible to link the 
 following types directly to a Tcl variable, making it much more 
 difficult to couple such variables to the Tcl level (compared with 
 *int* or *double* variables). This TIP fixes this, making it easier to 
 link C variables and embedded Tcl code. 

     * *char* 

     * *unsigned char* 

     * *short* 

     * *unsigned short* 

     * *unsigned int* 

     * *long* 

     * *unsigned long* 

     * *Tcl_WideUInt* 

     * *float* 

 There will be no impact on current applications. 

 SPECIFICATION 
===============

 The new types are inserted as new *#define TCL_LINK_** statements in 
 the /tcl.h/ header file and in the *switch* statements in the 
 /Tcl_Link/ functions. 

 The documentation of /Tcl_*Link*/ should mention the new types. 

 REFERENCE IMPLEMENTATION 
==========================

 A reference implementation is available as Patch #1242844 on 
 SourceForge[<URL:http://sf.net/support/tracker.php?aid=1242844>]. 

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

 This document has been placed in the public domain. 

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