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
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
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	Yes
5.3 Variable definitions	Yes
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	Integers (fixnums and bignums), reals, and complex numbers are supported.
6.3 Booleans	Yes
6.4 Pairs and lists	Yes
6.5 Symbols	Yes
6.6 Characters	Yes
6.7 Strings	Yes
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	Yes
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.
6.14 System interface	Yes

R7RS Compliance