Questions tagged [cc-mode]

Major mode for C, C++, Objective-C, Java, CORBA IDL, Pike, AWK. Included in GNU Emacs and XEmacs.

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How can I disable semicolon electric behaviour without impacting the other electric chars in CC-mode?

In CC-mode when the electric behavior of characters is enabled, typing the semicolon character triggers the c-electric-semi&comma command. That inserts the semicolon, terminates the line, moves ...
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37 views

Doom Emacs: Flycheck cannot find header files in gtkmm-3.0

I am attempting to use gtkmm-3.0-dev in a small project. It uses meson as its build tool, and I use ninja to create a compilation database. However, regardless of any variables I set, Flycheck cannot ...
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16 views

Aligning the colon in multi-line tertiary expressions in C and C++

Suppose I have the following line double dx = r1 < 1 ? sqrt(r1) - 1 : 1 - sqrt(2 - r1); I press enter and tab at the colon causing Emacs to align like this: double dx = r1 < 1 ? sqrt(r1) - 1 ...
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45 views

Altering syntax highlighting for a particular expression

In c-mode, I would like all lines beginning with exec sql to have that expression grey and the rest of the line in the default face. How might I achieve that?
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1answer
75 views

converting c-mode hooks to use-package fails in non-obvious ways

Emacs version 26.3 on a mac I have this (simplified) c(c)-mode config: (add-hook 'c-mode-common-hook '(lambda () (c-set-style "bsd"))) which works when I visit a c file. When I ...
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26 views

How to fix indentation of anonymous structures in function argument position in C?

I've been stumbling upon this constantly. Suppose that I have a function that accepts a structure, or a pointer to a structure: struct s { int n; char c; }; void f(struct s *s); I'd like to ...
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13 views

How to get first nested parameter indented based on outermost function

I would like to get the following cc-mode indentation behavior (c-basic-offset is 4): outerFunction(innerFunction( parameter1, parameter2)); However I would like to maintain arglist aligned ...
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7 views

How to prevent indentation from depending on identifier length?

I noticed that a lot of Emacs indentation styles cause the indentation of one line to depend on the length of identifiers in the previous line, for example: void usage(char* name) { fprintf(...
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71 views

c-electric-brace and smartparens pairs

Within c-mode it is possible to configure a style and with c-hanging-braces-alist it is possible to relocate braces like { and } to separate lines, inserting whitespace and so on. Th function which ...
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1answer
54 views

Workaround for “Invalid search bound (wrong side of point)” in CC Mode

Emacs 24.x and 25.x have a bug in CC Mode which can result in some operations failing with the error Invalid search bound (wrong side of point) For example, I can reproduce it with the following ...
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29 views

How to avoid annoying `auto-fill` behaviour in `c-mode` comment?

Recently I write quite a lot comments for c/c++ files. I use auto-fill-mode for comment auto format. But I found a quite annoying problem: whenever I input SPC at the end of a comment line, the cursor ...
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1answer
36 views

Inline elements of variable list value in rx() macro call [duplicate]

Is there a more compact way to make use of the rx macro in cases where we want to inline a list of strings from a variable? Such as (defconst c++20-new-keywords-list (list "char8_t" "import" ...
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46 views

Derived mode from CC Mode: how do I write one?

Where is the definitive, up-to-date guide on how to write a derived mode from CC Mode. I have a mode that's malfunctioning and thought I might just rewrite it, but information I find is spotty and ...
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55 views

`scad-mode` (derived from CC Mode) hangs Emacs. How to debug/fix?

I have found that scad-mode.el, a derived mode from CC Mode, which can be found here: https://github.com/openscad/openscad/blob/master/contrib/scad-mode.el hangs emacs if I type #( into the window,...
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1answer
65 views

How do I suppress indentation after labels in Groovy?

I'm writing some Groovy code, and in my unit tests I have something like the following: def testFoo(){ given: //setup statement 1 //setup statement 2 //... when: //Execute ...
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1answer
176 views

How to set tabulator size in the awk mode?

After installing a new kubuntu (16.04) and emacs (25.2.2) I have had indentation problems. It seems like indentation default values have changed or maybe I am missing some configuration file? ...
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1answer
213 views

Customizing indentation style for continuation lines?

I would like to customize the "k&r" indentation style, so that continuation lines are indented 8 spaces, like this: if (first && second) { // <- 8 spaces. third(); } -- ...
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43 views

Enable `cc-mode` documentation highlightning per minor mode

I am writing a minor mode for enabling support for JML within Java files. I realized the syntax highlighting with cc-mode's support for documentation comments. It works if I set c-doc-comment-style ...
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1answer
72 views

How to re-enable syntax highlighting of code that have been disabled by #if preprocessor statements

Code between #if SYMBOL and #endif is greyed out in cc-mode if the SYMBOL has not been defined within the current file. The project that I´m currently working on has a common code base for Mac and ...
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1answer
61 views

enlarge font of functions only in C code

I am trying to do exactly this for my C code, but once I edit latex, the setting is still active in uncomfortable places. I need to preserve the setting once I exit emacs and in all the buffers with C ...
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1answer
187 views

Indentation of multi-line arrays within braces?

Currently in C mode, contents of a muli-line arrays are aligned with the brace. eg: const unsigned int array[4] = { A, B, ...
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188 views

Is this a c-default-style? If not, how can i configure it?

I've just started using spacemacs and the docstrings for cc-styles are a bit daunting. I've also just started working on a new project in c, and would like to keep consistent with existing style: ...
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1answer
341 views

Customized c-offsets-alist override c-file-style in dir-locals

Assuming I customized my default C indentation settings through M-x customize-variable c-offsets-alist: (custom-set-variables '(c-offsets-alist (quote ((statement-case-open . 0) (...
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2answers
461 views

prevent auto indent temporarily for multi line conditional, loops, etc

When I am writing in c-mode, I prefer to write multi-line control statements in the following way. if( cond1 && cond2 || cond3 ) { /* stuff */ } for( i = 0; i < N; ++i ) { ...
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1answer
91 views

Which value for topmost-intro-cont, to align variable names in c-mode?

In c-mode, how to align following code so, that the second variable name's starting character (A) is aligned below the first variable name's starting character (V)? static unsigned int V_name_1, ...
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1answer
123 views

How to indent c++ “special” source lines that don't end with semicolons

I'm working with a system that uses special macros a lot. For instance: class UDSSLib : public UFunctionLibrary { GENERATED_BODY() void foo(); int i; } The problem is the GENERATED_BODY() line....
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21 views

Personalize indentation for new C++ language features [duplicate]

I'm starting to use C++-17, and one of the new features is if constexpr, which breaks completely the usual if identation: int main() { if constexpr(true) { return 1; } else { ...
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1answer
437 views

Indenting within block comments in C-mode Emacs

After writing functions in C/C++, I like to format my block comments that explain a function's purpose, parameters, use, and so on. (See example below) However, to indent my comments in emacs, I ...
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1answer
609 views

formatting constexpr if in c++-mode

I recently started using C++17, which brings constexpr if. This however screws up c++-modes default indentation. // emacs 25.3.2 with --no-init if constexpr (n == 1) { // Why? } else if ...
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1answer
69 views

objc-mode: Comment-end face is not same face as comment-start

How can I configure/modify objc-mode so that the face of comment-end is the same face as comment-start? [The goal is to have commend-end always use font-lock-comment-delimiter-face, instead of font-...
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2answers
1k views

How to use C++ comments “//” in c-mode?

In c-mode comment-region is adding /* */ style comments. Is there a way to default to using C++ style // prefix in C source files instead?
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1answer
87 views

Make wide string literal for C/C++

Is there function/package that allows to make "wide string literals" as defined by C/C++ standards. That is, where one has to replace all non-ascii characters with escaped "\x.." sequences.
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135 views

Structures are defined using a macro, flycheck gives errors

In our source code we surround structures with a macro (MKDIFF) that serves as a flag for the Makefile system. It does not expand into anything, just a flag. Flycheck (understandably) flags these ...
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0answers
257 views

How to set indentation style substatement-open offset parameter from .dir-locals.el?

Within CC mode, for C and C++ files inside a directory, I'd like to have the open braces following a case/do/for/if/while not indented, whatever the style is and without having to change anything in ....
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2answers
116 views

Stop reindenting `if` after `else`

Given the file test.c: int main() { if (a) foo(); else if (b) // line 6 bar(); else baz(); } Whenever a comma or paren is typed while point is on line 6 (...
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0answers
342 views

Emacs as environment for iOS development

Is there any modes which may improve development experience for nowadays ObjC (syntax highlight for method calls, properties, blocks, literals, lightweight generics, modern keywords)? Ideally with ...
3
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1answer
116 views

Update cc-style to use a mix of tabs and spaces, depending on context?

I'm looking for a way to mix tabs and spaces in my cc-styles. Whilst I question the sanity of this coding style, and wouldn't ever choose to use it had I the choice (seems other people share my view),...
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2answers
1k views

cc-styles c-offsets-alist setting for C++11 lambda brace indentation

I am trying to configure my cc-styles to use a single basic offset for the braces of an inline defined lambda. I have a function template which takes a functor as an argument template<typename ...
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1answer
169 views

emacs cc-mode installation issue

I am relatively new to emacs. I'm wanting to set up cc-mode. I'm having trouble with the process. When I initially viewed list-packages, a search brought up cc-mode, but something I've done means it ...
3
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1answer
844 views

Override c++-mode font lock

I am improving the C++ highlighting in Emacs with the minor mode: modern-cpp-font-lock. Consider this following C++14 code: int main() { int i = 1'2'3l; } From cppreference.com Optional single ...
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4answers
107 views

How do I find the variable or lisp code controlling a face at a particular column?

For the longest time I have been ignoring a face change at column 80 in my Java code. The text switches to a pinkish color as shown below. Now it is sufficiently bothersome that I would like to ...
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1answer
333 views

Setup c-mode indentation, braces and tabs

I've been trying to setup cc-mode based files to behave in the way I want, but with so many varying opinions and suggested ways of doing things, I've not been able to get things just right. All I ...
3
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2answers
196 views

Minor modes not working with derived mode from c++-mode

I created a derived mode (using define-derived-mode) based on c++-mode to include new keywords, etc. The mode is working great, but I'm having problems with other minor modes that stop working with ...
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2answers
77 views

CC-Mode doesn't indent arguments to templated functions starting with a curly bracket

[Reposted here after a comment from wilx on stackoverflow.com] Consider the following snippet of C++ code, indented using cc-mode: auto good1 = f(a, {1, 2}); // ((arglist-cont-...
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1answer
195 views

Custom indentation for specific lines?

I currently try to figure out, how I can handle some lines specifically without messing up the indentation of the rest of the buffer. Consider the following function MyFunc as an example: void MyFunc(...
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2answers
109 views

delete-c-electric-paren deletes active region in CC mode with delete-selection-mode enabled

I've the delete-selection-mode enabled. In programming modes like Python and Lua, or in general modes like Fundamental or Text, when there's an active region, pressing ( rightly wraps the region with ...
5
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1answer
589 views

rgrep default files pattern

How can I modify the default FILES pattern in rgrep for C++ mode? For C mode the default is *.[ch]. For C++, it is *.cc *.cxx *.cpp *.C *.CC *.c++. I would like to change it to *.cc *.[ch]xx *.[ch]...
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2answers
269 views

Added spaces between function arguments

I'd like to transform: function arg(a,b,c){} to function arg( a, b, c ){} Is there a way to do this or set it as part of c style auto indentation? So it will happen when editing JavaScript, C++, ...
2
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2answers
352 views

Create new major mode from cc-mode that allows comments with two dashes

It is possible and relatively easy to create a new major mode, deriving from c-mode, and just add two dashes '--' to work as comments too? I have checked many resources, but couldn't find anything ...
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88 views

Make Helm Projectile to show external sources

I'm pretty new to emacs (was using Vim), primarily using it for Ruby on Rails projects. At my free time, I like to write some C code for STM32 micro-controllers. Unlike RoR project, C project for ...