branch: elpa/swift-mode
commit 0b1e5e8ec5c65264690815cd64dd5ae31937d9f3
Author: taku0 <[email protected]>
Commit: taku0 <[email protected]>
Support raw texts
https://github.com/apple/swift-evolution/blob/master/proposals/0200-raw-string-escaping.md
---
swift-mode-lexer.el | 121 +++++++++++++++++++++-------------
test/swift-files/indent/strings.swift | 63 ++++++++++++++++++
2 files changed, 137 insertions(+), 47 deletions(-)
diff --git a/swift-mode-lexer.el b/swift-mode-lexer.el
index ad182a0..eb230da 100644
--- a/swift-mode-lexer.el
+++ b/swift-mode-lexer.el
@@ -229,10 +229,12 @@ Intended for `syntax-propertize-function'."
(let* ((chunk (swift-mode:chunk-after (syntax-ppss start))))
(cond
((swift-mode:chunk:multiline-string-p chunk)
- (swift-mode:syntax-propertize:end-of-multiline-string end))
+ (swift-mode:syntax-propertize:end-of-string
+ end "\"\"\"" (swift-mode:chunk:pound-count chunk)))
((swift-mode:chunk:single-line-string-p chunk)
- (swift-mode:syntax-propertize:end-of-single-line-string end))
+ (swift-mode:syntax-propertize:end-of-string
+ end "\"" (swift-mode:chunk:pound-count chunk)))
((swift-mode:chunk:comment-p chunk)
(goto-char (swift-mode:chunk:start chunk))
@@ -255,21 +257,21 @@ stops where the level becomes zero."
(< (point) end)
(search-forward-regexp pattern end t))
(cond
- ((equal "\"\"\"" (match-string-no-properties 0))
- (put-text-property (match-beginning 0) (1+ (match-beginning 0))
+ ((member (match-string-no-properties 0) '("\"\"\"" "\""))
+ (let ((start (match-beginning 0))
+ (pound-count 0)
+ (quotation (match-string-no-properties 0)))
+ (save-excursion
+ (goto-char start)
+ (skip-chars-backward "#")
+ (setq pound-count (- start (point)))
+ (setq start (point)))
+ (put-text-property start (1+ start)
'syntax-table
(string-to-syntax "|"))
- (let ((start (match-beginning 0)))
- (swift-mode:syntax-propertize:end-of-multiline-string end)
- (put-text-property start (point) 'syntax-multiline t)))
-
- ((equal "\"" (match-string-no-properties 0))
- (put-text-property (match-beginning 0) (1+ (match-beginning 0))
- 'syntax-table
- (string-to-syntax "|"))
- (let ((start (match-beginning 0)))
- (swift-mode:syntax-propertize:end-of-single-line-string end)
- (put-text-property start (point) 'syntax-multiline t)))
+ (swift-mode:syntax-propertize:end-of-string
+ end quotation pound-count)
+ (put-text-property start (point) 'syntax-multiline t)))
((equal "//" (match-string-no-properties 0))
(goto-char (match-beginning 0))
@@ -292,71 +294,84 @@ stops where the level becomes zero."
(goto-char end))
found-matching-parenthesis))
-(defun swift-mode:syntax-propertize:end-of-multiline-string (end)
- "Move point to the end of multiline string.
-Assuming the cursor is on a multiline string.
-If the end of the string found, put a text property on it.
-If the string go beyond END, stop there."
- (swift-mode:syntax-propertize:end-of-string end "\"\"\""))
-
-(defun swift-mode:syntax-propertize:end-of-single-line-string (end)
- "Move point to the end of single-line string.
-Assuming the cursor is on a single-line string.
-If the string go beyond END, stop there."
- (swift-mode:syntax-propertize:end-of-string end "\""))
-
-(defun swift-mode:syntax-propertize:end-of-string (end quotation)
+(defun swift-mode:syntax-propertize:end-of-string (end quotation pound-count)
"Move point to the end of single-line/multiline string.
+
Assuming the cursor is on a string.
If the string go beyond END, stop there.
-The string should be terminated with QUOTATION."
+The string should be terminated with QUOTATION, followed by POUND-COUNT of
+pound signs."
(if (and
(< (point) end)
(search-forward-regexp (concat (regexp-quote quotation) "\\|(") end t))
(cond
((and (equal quotation (match-string-no-properties 0))
- (not (swift-mode:escaped-p (match-beginning 0))))
+ (not (swift-mode:escaped-p (match-beginning 0) pound-count))
+ (progn
+ (skip-chars-forward "#" (min end (+ (point) pound-count)))
+ (= (- (point) (match-end 0)) pound-count)))
(put-text-property (1- (point)) (point)
'syntax-table
(string-to-syntax "|")))
((and (equal "(" (match-string-no-properties 0))
- (swift-mode:escaped-p (match-beginning 0)))
+ (swift-mode:escaped-p (match-beginning 0) pound-count))
;; Found an interpolated expression. Skips the expression.
;; We cannot use `scan-sexps' because multiline strings are not yet
;; propertized.
- (let ((start (- (point) 2)))
+ (let ((pos-after-open-paren (point))
+ (start
+ (save-excursion
+ (backward-char) ;; (
+ (skip-chars-backward "#")
+ (backward-char) ;; \
+ (point))))
+ ;; Declares the backslash is not a escape-syntax characters.
(put-text-property start (1+ start)
'syntax-table
(string-to-syntax "w"))
- (put-text-property (1+ start) (+ 2 start)
+ ;; Declares the open parentheses is a generic string delimiter.
+ (put-text-property (1- pos-after-open-paren) pos-after-open-paren
'syntax-table
(string-to-syntax "|"))
(when (swift-mode:syntax-propertize:scan end 1)
;; Found the matching parenthesis. Going further.
+ ;; Declares the close parentheses is a generic string delimiter.
(put-text-property (1- (point)) (point)
'syntax-table
(string-to-syntax "|"))
+ ;; Records the positions.
(put-text-property (1- (point)) (point)
'swift-mode:matching-parenthesis
start)
- (put-text-property start (+ 2 start)
+ (put-text-property start pos-after-open-paren
'swift-mode:matching-parenthesis
(1- (point)))
- (swift-mode:syntax-propertize:end-of-string end quotation))))
+ (swift-mode:syntax-propertize:end-of-string
+ end quotation pound-count))))
(t
- (swift-mode:syntax-propertize:end-of-string end quotation)))
+ (swift-mode:syntax-propertize:end-of-string end quotation
pound-count)))
(goto-char end)))
-(defun swift-mode:escaped-p (position)
- "Return t if the POSITION is proceeded by odd number of backslashes.
-Return nil otherwise."
+(defun swift-mode:escaped-p (position pound-count)
+ "Return t if the POSITION in a string is escaped.
+
+A position is escaped if it is proceeded by POUND-COUNT or more of pound signs
+and odd number of backslashes.
+Return nil otherwise." ;; FIXME pound-count
(let ((p position)
- (count 0))
- (while (eq (char-before p) ?\\)
- (setq count (1+ count))
+ (backslash-count 0))
+ (while (eq (char-before p) ?#)
(setq p (1- p)))
- (= (mod count 2) 1)))
+ (and
+ ;; While it is a syntax error to have extra pound signs, we allow them
+ ;; here to prevent corruption.
+ (<= pound-count (- position p))
+ (progn
+ (while (eq (char-before p) ?\\)
+ (setq backslash-count (1+ backslash-count))
+ (setq p (1- p)))
+ (= (mod backslash-count 2) 1)))))
;;; Lexers
@@ -911,8 +926,9 @@ This function does not return `implicit-;' or `type-:'."
(point))))
;; String
- ((eq (char-after) ?\")
+ ((looking-at "#*\"")
(let ((pos-after-comment (point)))
+ (skip-chars-forward "#")
(forward-char)
(swift-mode:end-of-string)
(swift-mode:token
@@ -1160,8 +1176,11 @@ This function does not return `implicit-;' or `type-:'."
pos-before-comment)))
;; String
- ((eq (char-before) ?\")
+ ((save-excursion
+ (skip-chars-backward "#")
+ (eq (char-before) ?\"))
(let ((pos-before-comment (point)))
+ (skip-chars-backward "#")
(backward-char)
(swift-mode:beginning-of-string)
(swift-mode:token
@@ -1325,6 +1344,14 @@ If this line ends with a single-line comment, goto just
before the comment."
"Return non-nil if the CHUNK is a multiline string."
(eq (swift-mode:chunk:type chunk) 'multiline-string))
+(defun swift-mode:chunk:pound-count (chunk)
+ "Return the number of pound signs before the start position of the CHUNK."
+ (save-excursion
+ (goto-char (swift-mode:chunk:start chunk))
+ (swift-mode:beginning-of-string)
+ (skip-chars-backward "#")
+ (- (swift-mode:chunk:start chunk) (point))))
+
(defun swift-mode:chunk-after (&optional parser-state)
"Return the chunk at the cursor.
@@ -1342,7 +1369,7 @@ If PARSER-STATE is given, it is used instead of
(syntax-ppss)."
;; string delimiters. So (nth 3 parser-state) may be t even for
;; single-line string delimiters.
(if (save-excursion (goto-char (nth 8 parser-state))
- (looking-at "\"\"\""))
+ (looking-at "#*\"\"\""))
(swift-mode:chunk 'multiline-string (nth 8 parser-state))
(swift-mode:chunk 'single-line-string (nth 8 parser-state))))
((eq (nth 4 parser-state) t)
diff --git a/test/swift-files/indent/strings.swift
b/test/swift-files/indent/strings.swift
index 1ca635d..862dde7 100644
--- a/test/swift-files/indent/strings.swift
+++ b/test/swift-files/indent/strings.swift
@@ -98,4 +98,67 @@ func f() {
bar()
)aaa"
)
+
+ let x = """
+ abc \(
+ 1 +
+ (
+ 1 +
+ 1
+ ) +
+ 1
+ )
+ def ghi
+ \"""
+ aaa
+ """
+
+ let x = #"""
+ abc \(
+ 1 +
+ (
+ 1 + 1
+ ) +
+ 1
+ )
+ abc \#(
+ 1 +
+ (
+ 1 + 1
+ ) +
+ 1
+ )
+ def ghi
+ \"""
+ \#"""#
+ """
+ aaa
+ """#
+
+ let x = ##"""
+ abc \(
+ 1 +
+ (
+ 1 + 1
+ ) +
+ 1
+ )
+ abc \#(
+ 1 +
+ (
+ 1 + 1
+ ) +
+ 1
+ )
+ def ghi
+ \"""
+ \#"""#
+ """
+ aaa
+ """##
+
+ let x = "abc\( 1 + (2 + 3) ) \" a "
+ let x = #"abc\( 1 + (2 + 3) ) \#( 1 + (2 + 3) ) \" \#"# " a \"#
+ let x = ##"abc\( 1 + (2 + 3) ) \#( 1 + (2 + 3) ) \" \#"# " a \"##
+ let x = 1
}
