TIP #440: Add engine to tcl_platform Array
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TIP:	440
Title:	Add engine to tcl_platform Array
Version:	$Revision: 1.13 $
Authors:	Joe Mistachkin <joe@mistachkin.com>
	Jan Nijtmans <jan.nijtmans@gmail.com>
State:	Final
Type:	Project
Tcl-Version:	8.5
Vote:	Done
Created:	Thu Jan 14 00:00:00 UTC 2016
Keywords:	language implementation, platform
Abstract
This TIP proposes a mechanism for determining the implementation of the Tcl language currently in use.
Rationale
There is more than one implementation of the Tcl language (see [http://wiki.tcl.tk/13992]). These implementations differ greatly in their degree of compatibility and completeness. At the script level, there is currently no standard way to determine which implementation of the Tcl language is being used.
Specification
The engine element will be added to the tcl_platform array. Its value will be set to "Tcl".
Reference Implementation
A reference implementation of this TIP is available [https://core.tcl.tk/tcl/timeline?r=tclPlatformEngine].
The TH1, Jim, Picol, JTcl, and Eagle implementations of the Tcl language already implement this feature, each using the name of the project as the value of the tcl_platform(engine) element.
Copyright
This document has been placed in the public domain.
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