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https://github.com/kanaka/mal.git
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dd7a4f55f3
Fixes made to: ada, c, chuck, clojure, coffee, common-lisp, cpp, crystal, d, dart, elm, erlang, es6, factor, fsharp, gnu-smalltalk, groovy, guile, haxe, hy, js, livescript, matlab, miniMAL, nasm, nim, objc, objpascal, ocaml, perl, perl6, php, plsql, ps, python, r, rpython, ruby, scheme, swift3, tcl, ts, vb, vimscript, wasm, yorick. Catchless try* test is an optional test. Not all implementations support catchless try* but a number were fixed so they at least don't crash on catchless try*.
65 lines
1.7 KiB
Hy
Executable File
65 lines
1.7 KiB
Hy
Executable File
#!/usr/bin/env hy
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(import sys traceback)
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(import [reader [read-str Blank]])
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(import [printer [pr-str]])
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;; read
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(defn READ [str]
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(read-str str))
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;; eval
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(defn eval-ast [ast env]
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(if
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(symbol? ast) (if (.has_key env ast) (get env ast)
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(raise (Exception (+ ast " not found"))))
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(instance? dict ast) (dict (map (fn [k]
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[(EVAL k env) (EVAL (get ast k) env)])
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ast))
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(instance? tuple ast) (tuple (map (fn [x] (EVAL x env)) ast))
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(instance? list ast) (list (map (fn [x] (EVAL x env)) ast))
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True ast))
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(defn EVAL [ast env]
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;; indented to match later steps
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(if (not (instance? tuple ast))
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(eval-ast ast env)
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;; apply list
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(if
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(empty? ast)
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ast
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;; apply
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(do
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(setv el (eval-ast ast env)
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f (first el)
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args (list (rest el)))
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(apply f args)))))
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;; print
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(defn PRINT [exp]
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(pr-str exp True))
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;; repl
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(def repl-env {'+ +
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'- -
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'* *
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'/ (fn [a b] (int (/ a b)))})
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(defn REP [str]
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(PRINT (EVAL (READ str) repl-env)))
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(defmain [&rest args]
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;; indented to match later steps
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(while True
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(try
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(do (setv line (raw_input "user> "))
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(if (= "" line) (continue))
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(print (REP line)))
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(except [EOFError] (break))
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(except [Blank])
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(except [e Exception]
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(print (.join "" (apply traceback.format_exception
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(.exc_info sys))))))))
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