application/octet-stream
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1.87 KB
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89 lines
;; Nujel - Copyright (C) 2020-2021 - Benjamin Vincent Schulenburg
;; This project uses the MIT license, a copy should be included under /LICENSE
;;
;; Contains native nujel implementations of some
;; core language constructs and essential macros
[def otherwise #t]
[defmacro comment body
"Does nothing"
#nil]
[defmacro += [val inc]
`[set! ~val [+ ~val ~inc]]]
[defmacro cdr! [l]
"[set! l [cdr l]]"
`[set! ~l [cdr ~l]]]
[defn not [v]
"Return true if V is false"
[if v #f #t]]
[defn identity [α]
"Returns its argument"
α]
[defn list arguments
"Return ARGUMENTS as a list"
arguments]
[defn default [arg default-value]
"Returns ARG or DEFAULT-VALUE if ARG is #nil"
[if arg arg default-value]]
[defn caar [p]
"[car [car p]]"
[car [car p]]]
[defn cadr [p]
"[car [cdr p]]"
[car [cdr p]]]
[defn cdar [p]
"[cdr [car p]]"
[cdr [car p]]]
[defn cddr [p]
"[cdr [cdr p]]"
[cdr [cdr p]]]
[defn cadar [p]
"[cdr [car p]]"
[car [cdr [car p]]]]
[defn caddr [p]
"[car [cdr [cdr p]]]"
[car [cdr [cdr p]]]]
[defn cdddr [p]
"[cdr [cdr [cdr p]]]"
[cdr [cdr [cdr p]]]]
[defn cadddr [p]
"[car [cdr [cdr [cdr p]]]]"
[car [cdr [cdr [cdr p]]]]]
[defn cddddr [p]
"[car [cdr [cdr [cdr p]]]]"
[cdr [cdr [cdr [cdr p]]]]]
[defn caddddr [p]
"[car [cdr [cdr [cdr p]]]]"
[car [cdr [cdr [cdr [cdr p]]]]]]
[defn cdddddr [p]
"[cdr [cdr [cdr [cdr p]]]]"
[cdr [cdr [cdr [cdr [cdr p]]]]]]
[defn keyword->string [α]
[when-not [keyword? α] [throw [list :type-error "[keyword->string] can only be called on keywords" α [current-lambda]]]]
[sym->str [keyword->symbol α]]]
[defn string->keyword [α]
[when-not [string? α] [throw [list :type-error "[string->keyword] can only be called on strings" α [current-lambda]]]]
[symbol->keyword [str->sym α]]]
[defmacro exception [type description value]
`[throw [list ~type ~description ~value [current-lambda]]]]
