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;;; parseclj.el --- Clojure/EDN parser -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2018 Arne Brasseur
;; Author: Arne Brasseur <arne@arnebrasseur.net>
;; Keywords: lisp clojure edn parser
;; Package-Requires: ((emacs "25") (a "0.1.0alpha4"))
;; Version: 0.1.0
;; This file is not part of GNU Emacs.
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Top level API for the Clojure parser.
;;; Code:
(require 'parseclj-parser)
(require 'parseclj-ast)
(defun parseclj-parse-clojure (&rest string-and-options)
"Parse Clojure source to AST.
Reads either from the current buffer, starting from point, until
`point-max', or reads from the optional string argument.
STRING-AND-OPTIONS can be an optional string, followed by
key-value pairs to specify parsing options.
- `:lexical-preservation' Retain whitespace, comments, and
discards. Defaults to nil.
- `:fail-fast' Raise an error when encountering invalid syntax.
Defaults to t.
- `:read-one'
Read a single form. Defaults to false: parse the complete input."
(if (stringp (car string-and-options))
(with-temp-buffer
(insert (car string-and-options))
(goto-char 1)
(apply 'parseclj-parse-clojure (cdr string-and-options)))
(let* ((value-p (lambda (e)
(and (parseclj-ast-node-p e)
(not (member (parseclj-ast-node-type e) '(:whitespace :comment :discard))))))
(options (apply 'a-list :value-p value-p string-and-options))
(lexical? (a-get options :lexical-preservation)))
(parseclj-parser (if lexical?
#'parseclj-ast--reduce-leaf-with-lexical-preservation
#'parseclj-ast--reduce-leaf)
(if lexical?
#'parseclj-ast--reduce-branch-with-lexical-preservation
#'parseclj-ast--reduce-branch)
options))))
(defun parseclj-unparse-clojure (ast)
"Parse Clojure AST to source code.
Given an abstract syntax tree AST (as returned by
`parseclj-parse-clojure'), turn it back into source code, and
insert it into the current buffer."
(if (parseclj-ast-leaf-node-p ast)
(insert (a-get ast :form))
(if (eql (parseclj-ast-node-type ast) :tag)
(parseclj-ast--unparse-tag ast)
(parseclj-ast--unparse-collection ast))))
(defun parseclj-unparse-clojure-to-string (ast)
"Parse Clojure AST to a source code string.
Given an abstract syntax tree AST (as returned by
`parseclj-parse-clojure'), turn it back into source code, and
return it as a string"
(with-temp-buffer
(parseclj-unparse-clojure ast)
(buffer-substring-no-properties (point-min) (point-max))))
(provide 'parseclj)
;;; parseclj.el ends here