[TCLCORE] Critcl 3.2 is available

[Andreas K. <and...@gm...>]

For the detailed changes see

https://andreas-kupries.github.io/critcl/doc/files/critcl_changes.html#section2

====

Two BREAKING changes since 3.1.18.1

  1. Tcl Core Version

       - 3.2 needs Tcl 8.6 to run
       - 3.2 generates Tcl 8.6 extensions by default
       - 3.2 is __still able__ to generate 8.4/8.5 extensions
       	 (See `critcl::tcl` command)

  2. The syntax of `build.tcl install` was wholly rewritten.
     Scripts using it have to be adapted.

FEATURES

  1. `cproc` allows near-C argument syntax.

     IOW `cproc foo {double alpha, int max} ...` is now ok.
     As are `cproc foo {double alpha ,int max} ...`
     and `cproc foo {double alpha , int max} ...`
     Note the comma in its various locations.

  1. `cproc` allows range-limited scalar types. I.e. `int > 3 < 10`
     is now a type limited to integer values in the range `4..9`.
     Can use all of `>`, `>=`, `<`, `<=`, in combinations.

  1. `cproc` now allows length-limited lists, type-restricted lists, and in
     combination.

     For example, `[4]` is a generic list limited to exactly 4 elements.

     Wheras `[]int` (and `int[]`) are lists whose elements have to be integers.

     And `[4]int` combines the length limit and type restrictions.

     The types `[]` (and `[*]`) are aliases of the existing basic `list` type.

     For syntax nearer to C the form `type foo[]` etc, for an argument `foo` is
     recognized too.

     Limitation: It is not possible to nest lists, nor can they be combined 
with
     range-limited scalars. I.e. types like `[][][]foo` are not possible, nor
     `[]int > 0`, or similar.

     This is used by Tcllib's updated `map::slippy` C accelerator to handle
     lists of geographic locations, boxes, points, ... See commit [2e83f22d34]

Happy Xmas and good new year.

-- 
Happy Tcling,
	Andreas Kupries <and...@gm...>
			<https://core.tcl-lang.org/akupries/>
			<https://akupries.tclers.tk/>
	Developer @	SUSE Software Solutions Germany GmbH
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