mirror of
https://github.com/janet-lang/janet
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77 lines
2.1 KiB
Plaintext
77 lines
2.1 KiB
Plaintext
# Copyright (c) 2017 Calvin Rose
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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# Bootstrap the language
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(def defmacro macro (fn [name & more]
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(tuple 'def name 'macro (tuple-prepend (tuple-prepend more name) 'fn))))
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(defmacro defn
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[name & more]
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(tuple 'def name
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(tuple-prepend (tuple-prepend more name) 'fn)))
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(defmacro when [cond & body] (tuple 'if cond (tuple-prepend body 'do)))
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(defn array-seq [x]
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(def len (length x))
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(var i 0)
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{
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:more (fn [] (< i len))
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:next (fn []
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(def ret (get x i))
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(varset! i (+ i 1))
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ret)
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})
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(def seqs {
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:array array-seq
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:tuple array-seq
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:struct (fn [x] x)})
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(defn seq [x]
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(def makeseq (get seqs (type x)))
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(if makeseq (makeseq x) (error "expected sequence")))
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(defn range [top]
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(var i 0)
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{
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:more (fn [] (< i top))
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:next (fn []
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(def ret i)
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(varset! i (+ i 1))
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i)
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})
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(defn doseq [s f]
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(def s (seq s))
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(def more? (get s :more))
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(def getnext (get s :next))
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(while (more?)
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(f (getnext))))
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(defn map [f s]
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(def s (seq s))
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(def more (get s :more))
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(def getnext (get s :next))
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{
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:more more
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:next (f (getnext))
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})
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