Function: ruby-syntax-propertize

ruby-syntax-propertize is a byte-compiled function defined in ruby-mode.el.gz.

Signature

(ruby-syntax-propertize START END)

Documentation

Syntactic keywords for Ruby mode. See syntax-propertize-function.

Aliases

ruby-syntax-propertize-function (obsolete since 25.1)

Source Code

;; Defined in /usr/src/emacs/lisp/progmodes/ruby-mode.el.gz
(defun ruby-syntax-propertize (start end)
  "Syntactic keywords for Ruby mode.  See `syntax-propertize-function'."
  (let (case-fold-search)
    (goto-char start)
    (remove-text-properties start end '(ruby-expansion-match-data nil))
    (ruby-syntax-propertize-heredoc end)
    (ruby-syntax-enclosing-percent-literal end)
    (funcall
     (syntax-propertize-rules
      ;; $' $" $` .... are variables.
      ;; ?' ?" ?` are character literals (one-char strings in 1.9+).
      ("\\([?$]\\)[#\"'`:?]"
       (1 (if (save-excursion
                (nth 3 (syntax-ppss (match-beginning 0))))
              ;; Within a string, skip.
              (ignore
               (goto-char (match-end 1)))
            (put-text-property (match-end 1) (match-end 0)
                               'syntax-table (string-to-syntax "_"))
            (string-to-syntax "'"))))
      ;; Symbols with special characters.
      (":\\([-+~]@?\\|[/%&|^`]\\|\\*\\*?\\|<\\(<\\|=>?\\)?\\|>[>=]?\\|===?\\|=~\\|![~=]?\\|\\[\\]=?\\)"
       (1 (unless (or
                   (nth 8 (syntax-ppss (match-beginning 1)))
                   (eq (char-before (match-beginning 0)) ?:))
            (goto-char (match-end 0))
            (string-to-syntax "_"))))
      ;; Symbols ending with '=' (bug#42846).
      (":[[:alpha:]][[:alnum:]_]*\\(=\\)"
       (1 (unless (or (nth 8 (syntax-ppss))
                      (eq (char-before (match-beginning 0)) ?:)
                      (eq (char-after (match-end 3)) ?>))
            (string-to-syntax "_"))))
      ;; Part of method name when at the end of it.
      ("[!?]"
       (0 (unless (save-excursion
                    (or (nth 8 (syntax-ppss (match-beginning 0)))
                        (let (parse-sexp-lookup-properties)
                          (zerop (skip-syntax-backward "w_")))
                        (memq (preceding-char) '(?@ ?$))))
            (string-to-syntax "_"))))
      ;; Backtick method redefinition.
      ("^[ \t]*def +\\(`\\)" (1 "_"))
      ;; Ternary operator colon followed by opening paren or bracket
      ;; (semi-important for indentation).
      ("\\(:\\)\\(?:[({]\\|\\[[^]]\\)"
       (1 (string-to-syntax ".")))
      ;; Regular expressions.
      ("\\(/\\)"
       (1
        ;; No unescaped slashes in front.
        (when (save-excursion
                (forward-char -1)
                (cl-evenp (skip-chars-backward "\\\\")))
          (let ((state (save-excursion (syntax-ppss (match-beginning 1)))))
            (when (or
                   ;; Beginning of a regexp.
                   (and (null (nth 8 state))
                        (or (not
                             ;; Looks like division.
                             (or (eql (char-after) ?\s)
                                 (eql (char-after) ?=)
                                 (not (eql (char-before (1- (point))) ?\s))))
                            (save-excursion
                              (forward-char -1)
                              (looking-back ruby-syntax-before-regexp-re
                                            (line-beginning-position)))))
                   ;; End of regexp.  We don't match the whole
                   ;; regexp at once because it can have
                   ;; string interpolation inside, or span
                   ;; several lines.
                   (eq ?/ (nth 3 state)))
              (string-to-syntax "\"/"))))))
      ;; Expression expansions in strings.  We're handling them
      ;; here, so that the regexp rule never matches inside them.
      (ruby-expression-expansion-re
       (0 (ignore
           (if (save-excursion
                 (goto-char (match-beginning 0))
                 ;; The hash character is not escaped.
                 (cl-evenp (skip-chars-backward "\\\\")))
               (ruby-syntax-propertize-expansion)
             (goto-char (match-beginning 1))))))
      ("^=en\\(d\\)\\_>" (1 "!"))
      ("^\\(=\\)begin\\_>" (1 "!"))
      ;; Handle here documents.
      ((concat ruby-here-doc-beg-re ".*\\(\n\\)")
       (7 (when (and (not (nth 8 (save-excursion
                                   (syntax-ppss (match-beginning 0)))))
                     (ruby-verify-heredoc (match-beginning 0)))
            (put-text-property (match-beginning 7) (match-end 7)
                               'syntax-table (string-to-syntax "\""))
            (ruby-syntax-propertize-heredoc end))))
      ;; Handle percent literals: %w(), %q{}, etc.
      ((concat "\\(?:^\\|[[ \t\n<+(,=*]\\)" ruby-percent-literal-beg-re)
       (1 (unless (nth 8 (save-excursion (syntax-ppss (match-beginning 1))))
            ;; Not inside a string, a comment, or a percent literal.
            (ruby-syntax-propertize-percent-literal end)
            (string-to-syntax "|")))))
     (point) end)))