BiwaScheme : Scheme interpreter for browser and Node.js

Implementation Status

BiwaScheme aims to conform to the latest specification of the Scheme language, R6RS.

Most of the important features are already supported. The biggest features not implemented are errors and hygenic macros (for now, BiwaScheme has 'define-macro' instead).

R6RS Base library

section	title	status
11.4	Expressions	ok
11.5	Equivalence predicates	ok
11.6	Procedure predicate	ok
11.7.4.1	Numerical operations	almost ok
11.8	Booleans	ok
11.9	Paris and lists	ok
11.10	Symbols	ok
11.11	Characters	ok
11.12	Strings	ok
11.13	Vectors	ok
11.14	Errors and violations	not yet
11.15	Control features	ok
11.16	Iteration	ok
11.17	Quasiquotation	almost ok (except vector quasiquotation)
11.18	Binding constructs for syntactic keywords	not yet
11.19	Macro transformers	not yet
11.20	Tail calls and tail contexts	ok

R6RS Standard Libraries

1	Unicode	not yet
2	Bytevectors	(no plan)
3	List utilities	ok
4	Sorting	partially ok
5	Control structures	partially ok (except case-lambda)
6	Records	ok
7	Exceptions and conditions	not yet
8	I/O	partially ok (output to 'stdout')
9	File system	ok (on Node.js)
10	Command-line access and exit values	ok (on Node.js)
11	Arithmetic	not yet
12	syntax-case	not yet
13	Hashtables	ok
14	Enumerations	ok
15	Composite library	not yet
16	eval	almost ok (eval)
17	Mutable pairs	(no plan)
18	Mutable strings	(no plan) # because JavaScript does not provide mutable strings
19	R5RS compatibility	(no plan)

'(no plan)' means that I have no plan to support it, but does not mean will never include it; patches are welcome.

SRFIs

See http://srfi.schemers.org/ for SRFI (Scheme Requests for Implementation).

1	list utilities	partially (iota)
6	string port	ok
13	string utilities	not yet
19	time	partially
27	random	partially (random-integer)
30	multi-line comment	ok
38	write/ss	partially (write/ss)
43	vector	partially (vector-append)
62	s-expr comment	ok