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Source for wiki UnicodeSupport version 3

author

aag

comment

Corrected characterization of MIT Scheme support for Unicode strings.

ipnr

127.11.51.1

name

UnicodeSupport

readonly

0

text

== Unicode support ==

I examined the result of `(integer->char 256)`, the first Unicode character outside the 8-bit range, and then attempted to create a string containing it.  I then tried the same thing with `(integer->char 65536)`, the first Unicode character outside the Basic Multilingual Plane.  In all cases where it was possible to create a string, it correctly had a length of 1.

Full support:  Racket, Gauche, Gambit, Chicken, Scheme48/scsh, Guile, Kawa, Chez, Vicare, Larceny, Ypsilon, Mosh, STklos, KSi, !SigScheme, XLisp, BDC, Foment, Owl Lisp, Chibi

Characters exist but can't be in a string: MIT (but there are special UTF8 and "wide" strings)

Character 256 exists, but can't be in a string; character 65536 does not exist: RScheme

Character 65536 does not exist: SISC, !IronScheme, NexJ, JScheme

Character 256 does not exist:  Bigloo, SCM, Shoe, !TinyScheme, Scheme 9, S7, UMB, Elk, SXM, Sizzle, Inlab

No `integer->char` procedure: Rep, Schemik, Llava, !FemtoLisp, Dfsch

== NUL character ==

I also tested to see if Schemes could handle character 0 (ASCII NUL) correctly.  All Schemes in the test suite treated it like any other character.

== Unicode identifiers ==

I tried to define the identifier π with the value 3.141592653 and then evaluate it.

Successful:  Racket, Gauche, Gambit, Chicken, Bigloo, Scheme48/scsh, Guile, Kawa, SISC, SCM, Chez, Vicare, Larceny, Ypsilon, Mosh, !IronScheme, NexJ, JScheme, STklos, KSi, !SigScheme, Shoe, !TinyScheme, RScheme, S7, BDC, UMB, Elk, Llava, Sizzle, !FemtoLisp, Dfsch, Inlab, Foment, Owl Lisp, Chibi

Unsuccessful: MIT, Chez (can't enter π at the REPL), Scheme 9, XLisp, Rep, Schemik, SXM

time

2014-05-04 04:50:37

version

3