cyclone/docs/Scheme-Language-Compliance.md

R⁷RS Compliance

This is the status of Scheme programming language features implemented from the R⁷RS Scheme Specification:

Section	Status	Comments
2.2 Whitespace and comments	Yes
2.3 Other notations	Yes
2.4 Datum labels	No
3.1 Variables, syntactic keywords, and regions	Yes
3.2 Disjointness of types	Yes
3.3 External representations	Yes
3.4 Storage model	Yes	No immutable types at this time.
3.5 Proper tail recursion	Yes
4.1 Primitive expression types	Yes
4.2 Derived expression types	Yes
4.2.1 Conditionals	Yes
4.2.2 Binding constructs	Yes
4.2.3 Sequencing	Yes
4.2.4 Iteration	Yes
4.2.5 Delayed evaluation	Yes
4.2.6 Dynamic bindings	Yes	Parameter objects do not have thread-specific data at this time.
4.2.7 Exception handling	Yes
4.2.8 Quasiquotation	Yes
4.2.9 Case-lambda	Yes
4.3 Macros	Yes	Support for syntax-rules and a lower-level explicit renaming macro system.
5.1 Programs	Yes
5.2 Import declarations	Partial
5.3 Variable definitions	Partial	define-values is not implemented yet.
5.4 Syntax definitions	Yes
5.5 Record-type definitions	Yes
5.6 Libraries	Yes
5.7 The REPL	Yes
6.1 Equivalence predicates	Yes
6.2 Numbers	Partial	Only integers and reals are supported at this time.
6.3 Booleans	Yes	#true and #false are not recognized by parser.
6.4 Pairs and lists	Yes
6.5 Symbols	Yes
6.6 Characters	Partial	No unicode support.
6.7 Strings	Partial	No unicode support.
6.8 Vectors	Yes
6.9 Bytevectors	Yes
6.10 Control features	Yes	dynamic-wind is limited, and does not work across calls to continuations.
6.11 Exceptions	Partial	Exceptions are implemented but error objects (and associated functions error-object, etc) are not at this time.
6.12 Environments and evaluation	Partial	Only eval is implemented at this time.
6.13 Input and output	Partial	Functions do not differentiate between binary and textual ports. Do not have support for input/output strings or bytevectors.
6.14 System interface	Yes