7 Zuo Kernel Language🔗ℹ

The body of a zuo/kernel module is a single expression using a set of core syntactic forms and primitives. The expression must produce a hash table that serves as the module’s representation (see Zuo Module Protocol).

7.1 Syntactic Forms🔗ℹ

A lambda form can optionally include a name and/or arity mask. If an arity mask is provided, it must be a subset of the mask implied by the formals. If formals allows 63 or more arguments, then it must allow any number of arguments (to be consistent with the possible arities expressed by a mask).

Although let and begin could be encoded with lambda easily enough, they’re useful shortcuts to make explicit internally.

7.2 Primitives🔗ℹ

The following names provided by zuo are also available in zuo/kernel (and the values originate there):

pair? null? list? cons car cdr list append reverse length

list-ref list-set

integer? + - * quotient remainder < <= = >= >

bitwise-and bitwise-ior bitwise-xor bitwise-not

string? string-length string-ref string-u32-ref substring string

string=? string-ci=? string-sha256 string-split

symbol? symbol->string string->symbol string->uninterned-symbol

hash? hash hash-ref hash-set hash-remove

hash-keys hash-count hash-keys-subset?

procedure? apply call/cc call/prompt

eq? not void

opaque opaque-ref

path-string? build-path build-raw-path split-path relative-path?

module-path? build-module-path

variable? variable variable-ref variable-set!

handle? fd-open-input fd-open-output fd-close fd-read fd-write eof

fd-terminal? cleanable-file cleanable-cancel

stat ls rm mv mkdir rmdir symlink readlink cp

runtime-env current-time

process process-status process-wait string->shell shell->strings

string-read ~v ~a ~s alert error arity-error arg-error

kernel-env kernel-eval module->hash dump-image-and-exit exit

suspend-signal resume-signal

Changed in version 1.9: Removed modulo and added remainder.