mirror of
https://github.com/janet-lang/janet
synced 2024-11-06 00:36:17 +00:00
78 lines
2.4 KiB
Plaintext
78 lines
2.4 KiB
Plaintext
(def a (fn [] 2))
|
|
#
|
|
# Copyright (c) 2017 Calvin Rose
|
|
#
|
|
# Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
# of this software and associated documentation files (the "Software"), to
|
|
# deal in the Software without restriction, including without limitation the
|
|
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
# sell copies of the Software, and to permit persons to whom the Software is
|
|
# furnished to do so, subject to the following conditions:
|
|
#
|
|
# The above copyright notice and this permission notice shall be included in
|
|
# all copies or substantial portions of the Software.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
# IN THE SOFTWARE.
|
|
#
|
|
|
|
# Define a simple pretty printer
|
|
|
|
(def pp (do
|
|
|
|
(defn pp-seq [pp seen buf a start end]
|
|
(if (get seen a)
|
|
(buffer-push-string buf "<cycle>")
|
|
(do
|
|
(put seen a true)
|
|
(def len (length a))
|
|
(buffer-push-string buf start)
|
|
(for [i 0 len]
|
|
(when (not= i 0) (buffer-push-string buf " "))
|
|
(pp seen buf (get a i)))
|
|
(buffer-push-string buf end)
|
|
))
|
|
buf)
|
|
|
|
(defn pp-dict [pp seen buf a start end]
|
|
(if (get seen a)
|
|
(buffer-push-string buf "<cycle>")
|
|
(do
|
|
(put seen a true)
|
|
(var k (next a nil))
|
|
(buffer-push-string buf start)
|
|
(while k
|
|
(def v (get a k))
|
|
(pp seen buf k)
|
|
(buffer-push-string buf " ")
|
|
(pp seen buf v)
|
|
(varset! k (next a k))
|
|
(when k (buffer-push-string buf " "))
|
|
)
|
|
(buffer-push-string buf end)
|
|
))
|
|
buf)
|
|
|
|
(def _printers {
|
|
:array (fn [pp seen buf x] (pp-seq pp seen buf x "[" "]"))
|
|
:tuple (fn [pp seen buf x] (pp-seq pp seen buf x "(" ")"))
|
|
:table (fn [pp seen buf x] (pp-dict pp seen buf x "@{" "}"))
|
|
:struct (fn [pp seen buf x] (pp-dict pp seen buf x "{" "}"))
|
|
})
|
|
|
|
(defn _default_printer [pp seen buf x]
|
|
(buffer-push-string buf (string x))
|
|
buf)
|
|
|
|
(defn pp1 [seen buf x]
|
|
(def pmaybe (get _printers (type x)))
|
|
(def p (if pmaybe pmaybe _default_printer))
|
|
(p pp1 seen buf x))
|
|
|
|
(fn [x] (print (pp1 @{} @"" x)))))
|