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-;;; smartparens-rust.el --- Additional configuration for Rust based modes. -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2015 Wilfred Hughes
-
-;; Created: 3 November 2015
-;; Keywords: abbrev convenience editing
-;; URL: https://github.com/Fuco1/smartparens
-
-;; This file is not part of GNU Emacs.
-
-;;; License:
-
-;; This file is part of Smartparens.
-
-;; Smartparens 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 of the License, or
-;; (at your option) any later version.
-
-;; Smartparens 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 Smartparens. If not, see <http://www.gnu.org/licenses/>.
-
-;;; Commentary:
-
-;; This file provides some additional configuration for Rust. To use
-;; it, simply add:
-;;
-;; (require 'smartparens-config)
-;;
-;; alternatively, you can explicitly load these preferences:
-;;
-;; (require 'smartparens-rust)
-;;
-;; in your configuration.
-
-;; For more info, see github readme at
-;; https://github.com/Fuco1/smartparens
-
-;;; Code:
-(require 'smartparens)
-
-(declare-function rust-mode "rust-mode")
-(declare-function rustic-mode "rustic-mode")
-
-(defun sp-in-rust-lifetime-context (&rest _args)
- "Return t if point is in a Rust context where ' represents a lifetime.
-If we return nil, ' should be used for character literals.
-ARGS."
- (or
- (condition-case nil
- ;; If point is just after a &', it's probably a &'foo.
- (save-excursion
- (backward-char 2)
- (looking-at "&"))
- ;; If we're at the beginning of the buffer, just carry on.
- (beginning-of-buffer))
- ;; If point is inside < > it's probably a parameterised function.
- (let ((paren-pos (nth 1 (syntax-ppss))))
- (and paren-pos
- (save-excursion
- (goto-char paren-pos)
- (looking-at "<"))))))
-
-(defun sp-rust-skip-match-angle-bracket (_ms _mb me)
- "Non-nil if we should ignore the bracket as valid delimiter."
- (save-excursion
- (goto-char me)
- (let ((on-fn-return-type
- (sp--looking-back-p (rx "->") nil))
- (on-match-branch
- (sp--looking-back-p (rx "=>") nil))
- (on-comparison
- (sp--looking-back-p (rx (or
- (seq space "<")
- (seq space ">")
- (seq space "<<")
- (seq space ">>")))
- nil)))
- (or on-comparison on-fn-return-type on-match-branch))))
-
-(defun sp-rust-filter-angle-brackets (_id action context)
- "Non-nil if we should allow ID's ACTION in CONTEXT for angle brackets."
- ;; See the docstring for `sp-pair' for the possible values of ID,
- ;; ACTION and CONTEXT.
- (cond
- ;; Inside strings, don't do anything with < or >.
- ((eq context 'string)
- nil)
- ;; Don't do any smart pairing inside comments either.
- ((eq context 'comment)
- nil)
- ;; Otherwise, we're in code.
- ((eq context 'code)
- (let ((on-fn-return-type
- (looking-back (rx "->") nil))
- (on-match-branch
- (looking-back (rx "=>") nil))
- (on-comparison
- (looking-back (rx (or
- (seq space "<")
- (seq space ">")
- (seq space "<<")
- (seq space ">>")))
- nil)))
- (cond
- ;; Only insert a matching > if we're not looking at a
- ;; comparison.
- ((eq action 'insert)
- (and (not on-comparison) (not on-fn-return-type) (not on-match-branch)))
- ;; Always allow wrapping in a pair if the region is active.
- ((eq action 'wrap)
- (not on-match-branch))
- ;; When pressing >, autoskip if we're not looking at a
- ;; comparison.
- ((eq action 'autoskip)
- (and (not on-comparison) (not on-fn-return-type) (not on-match-branch)))
- ;; Allow navigation, highlighting and strictness checks if it's
- ;; not a comparison.
- ((eq action 'navigate)
- (and (not on-comparison) (not on-fn-return-type) (not on-match-branch))))))))
-
-(sp-with-modes '(rust-mode rustic-mode)
- (sp-local-pair "'" "'"
- :unless '(sp-in-comment-p sp-in-string-quotes-p sp-in-rust-lifetime-context)
- :post-handlers'(:rem sp-escape-quotes-after-insert))
- (sp-local-pair "<" ">"
- :when '(sp-rust-filter-angle-brackets)
- :skip-match 'sp-rust-skip-match-angle-bracket))
-
-;; Rust has no sexp suffices. This fixes slurping
-;; (|foo).bar -> (foo.bar)
-(add-to-list 'sp-sexp-suffix (list #'rust-mode 'regexp ""))
-(add-to-list 'sp-sexp-suffix (list #'rustic-mode 'regexp ""))
-
-(provide 'smartparens-rust)
-
-;;; smartparens-rust.el ends here
Copyright 2019--2024 Marius PETER