Package: cc-mode;
Reported by: Tau <tau <at> ea7aba.be>
Date: Mon, 8 Apr 2019 14:19:02 UTC
Severity: normal
Done: Alan Mackenzie <acm <at> muc.de>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Glenn Morris <rgm <at> gnu.org> To: 35194 <at> debbugs.gnu.org Cc: Tau <tau <at> ea7aba.be> Subject: bug#35194: CC Mode 5.33.1 (C++//l); Indentation of C++ methods with ref-qualifiers is broken. Date: Mon, 08 Apr 2019 12:18:11 -0400
Report reassigned to cc-mode.
(It seems that cc-mode users not infrequently report bugs from mail
clients that don't support X- headers. So I suggest also putting "Package:
cc-mode" at the start of the message body in c-submit-bug-report.)
Tau wrote:
> Methods with ref-qualifiers (& and &&) seem to get indented with
> "brace-list-intro" which, as I understand it, is used for
> initializer lists and not code blocks. It is set to
> "c-lineup-arglist-intro-after-paren" in GNU style which is the
> default.
>
> Functions that use the auto syntax for return types and return
> a reference are affected as well.
>
> // Example of incorrect indentation in a program:
>
> #include <iostream>
>
> struct T {
> void a_method() && {
> std::cout << "rvalue ref\n";
> }
>
> void a_method() const& {
> std::cout << "lvalue const ref\n";
> }
>
> void this_gets_properly_indented() const {
> std::cout << "without a ref-qualifier\n";
> }
>
> auto this_too() && -> void {
> std::cout << "rvalue ref; '->' notation\n";
> }
>
> auto this_breaks_again() -> T& {
> return *this;
> }
> };
>
> int main() {
> T x;
>
> T().a_method();
> x.a_method();
> }
>
> Emacs : GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version
> 3.22.30) of 2018-07-05
> Package: CC Mode 5.33.1 (C++//l)
> Buffer Style: gnu
> c-emacs-features: (pps-extended-state col-0-paren posix-char-classes
> gen-string-delim gen-comment-delim syntax-properties 1-bit)
>
> current state:
> ==============
> (setq
> c-basic-offset 2
> c-comment-only-line-offset '(0 . 0)
> c-indent-comment-alist '((anchored-comment column . 0) (end-block
> space . 1) (cpp-end-block space . 2))
> c-indent-comments-syntactically-p nil
> c-block-comment-prefix ""
> c-comment-prefix-regexp '((pike-mode . "//+!?\\|\\**") (awk-mode .
> "#+") (other . "//+\\|\\**"))
> c-doc-comment-style '((java-mode . javadoc) (pike-mode . autodoc)
> (c-mode . gtkdoc)) c-cleanup-list '(scope-operator)
> c-hanging-braces-alist '((substatement-open before after)
> (arglist-cont-nonempty)) c-hanging-colons-alist nil
> c-hanging-semi&comma-criteria '(c-semi&comma-inside-parenlist)
> c-backslash-column 48
> c-backslash-max-column 72
> c-special-indent-hook '(c-gnu-impose-minimum)
> c-label-minimum-indentation 1
> c-offsets-alist '((inexpr-class . +)
> (inexpr-statement . +)
> (lambda-intro-cont . +)
> (inlambda . c-lineup-inexpr-block)
> (template-args-cont c-lineup-template-args +)
> (incomposition . +)
> (inmodule . +)
> (innamespace . +)
> (inextern-lang . +)
> (composition-close . 0)
> (module-close . 0)
> (namespace-close . 0)
> (extern-lang-close . 0)
> (composition-open . 0)
> (module-open . 0)
> (namespace-open . 0)
> (extern-lang-open . 0)
> (objc-method-call-cont
> c-lineup-ObjC-method-call-colons
> c-lineup-ObjC-method-call
> +
> )
> (objc-method-args-cont . c-lineup-ObjC-method-args)
> (objc-method-intro . [0])
> (friend . 0)
> (cpp-define-intro c-lineup-cpp-define +)
> (cpp-macro-cont . +)
> (cpp-macro . [0])
> (inclass . +)
> (stream-op . c-lineup-streamop)
> (arglist-cont-nonempty c-lineup-gcc-asm-reg
> c-lineup-arglist) (arglist-cont c-lineup-gcc-asm-reg 0)
> (comment-intro c-lineup-knr-region-comment
> c-lineup-comment) (catch-clause . 0)
> (else-clause . 0)
> (do-while-closure . 0)
> (access-label . -)
> (case-label . 0)
> (substatement . +)
> (statement-case-intro . +)
> (statement . 0)
> (brace-entry-open . 0)
> (brace-list-entry . c-lineup-under-anchor)
> (brace-list-close . 0)
> (block-close . 0)
> (block-open . 0)
> (inher-cont . c-lineup-multi-inher)
> (inher-intro . +)
> (member-init-cont . c-lineup-multi-inher)
> (member-init-intro . +)
> (annotation-var-cont . +)
> (annotation-top-cont . 0)
> (topmost-intro . 0)
> (knr-argdecl . 0)
> (func-decl-cont . +)
> (inline-close . 0)
> (class-close . 0)
> (class-open . 0)
> (defun-block-intro . +)
> (defun-close . 0)
> (defun-open . 0)
> (c . c-lineup-C-comments)
> (string . c-lineup-dont-change)
> (topmost-intro-cont
> first
> c-lineup-topmost-intro-cont
> c-lineup-gnu-DEFUN-intro-cont
> )
> (brace-list-intro .
> c-lineup-arglist-intro-after-paren) (brace-list-open . +)
> (inline-open . 0)
> (arglist-close . c-lineup-arglist)
> (arglist-intro . c-lineup-arglist-intro-after-paren)
> (statement-cont . +)
> (statement-case-open . +)
> (label . 0)
> (substatement-label . 0)
> (substatement-open . +)
> (knr-argdecl-intro . 5)
> (statement-block-intro . +)
> )
> c-buffer-is-cc-mode 'c++-mode
> c-tab-always-indent t
> c-syntactic-indentation t
> c-syntactic-indentation-in-macros t
> c-ignore-auto-fill '(string cpp code)
> c-auto-align-backslashes t
> c-backspace-function 'backward-delete-char-untabify
> c-delete-function 'delete-char
> c-electric-pound-behavior nil
> c-default-style '((java-mode . "java") (awk-mode . "awk") (other .
> "gnu")) c-enable-xemacs-performance-kludge-p nil
> c-old-style-variable-behavior nil
> defun-prompt-regexp nil
> tab-width 8
> comment-column 32
> parse-sexp-ignore-comments t
> parse-sexp-lookup-properties t
> auto-fill-function nil
> comment-multi-line t
> comment-start-skip "\\(//+\\|/\\*+\\)\\s *"
> fill-prefix nil
> fill-column 70
> paragraph-start "[ ]*\\(//+\\|\\**\\)[ ]*$\\|^\f"
> adaptive-fill-mode t
> adaptive-fill-regexp
> "[ ]*\\(//+\\|\\**\\)[ ]*\\([ ]*\\([-–!|#%;>*·•‣⁃◦]+[ ]*\\)*\\)" )
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