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~minimised C/C++ configuration to use-package cc-mode

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use-package allows for lazy loading C features, which means load time
is slightly smaller.
This commit is contained in:
Aryadev Chavali
2020-08-01 18:24:16 +01:00
parent 5e0817b944
commit 36124e9861
1 changed files with 33 additions and 44 deletions
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77
Emacs/.config/emacs/config.org
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@@ -560,10 +560,39 @@
(setq indent-tabs-mode t))
#+END_SRC
** C/C++
*** C Offset
#+BEGIN_SRC emacs-lisp
(setq-default c-basic-offset 2)
#+END_SRC
Setup for C and C++ modes via the cc-mode package.
Firstly hook the C and C++ modes to activate tabs.
Then set the offset to 2, and the general style to user.
Finally, add a user style that mimics the Microsoft guidelines for C# (open braces everywhere).
#+BEGIN_SRC emacs-lisp
(use-package cc-mode
:hook (c-mode . +dx:activate-tabs)
:hook (c++-mode . +dx:activate-tabs)
:init
(setq-default c-basic-offset 2)
(setq c-default-style '((java-mode . "java")
(awk-mode . "awk")
(other . "user")))
:config
(c-add-style
"user"
'((c-basic-offset . 2)
(c-comment-only-line-offset . 0)
(c-hanging-braces-alist (brace-list-open)
(brace-entry-open)
(substatement-open after)
(block-close . c-snug-do-while)
(arglist-cont-nonempty))
(c-cleanup-list brace-else-brace)
(c-offsets-alist
(statement-block-intro . +)
(knr-argdecl-intro . 0)
(substatement-open . 0)
(substatement-label . 0)
(access-label . 0)
(label . 0)
(statement-cont . +)))))
#+END_SRC
*** Clang format
use-package clang-format for ease of use formatting, binding to "C-c '" for both C and C++ mode maps.
#+BEGIN_SRC emacs-lisp
@@ -573,43 +602,3 @@
(bind-key "C-c '" #'clang-format-region c-mode-map)
(bind-key "C-c '" #'clang-format-region c++-mode-map))
#+END_SRC
*** Tabs mode for C and C++
Add tabs to both C and C++ modes via =activate-tabs= function.
#+BEGIN_SRC emacs-lisp
(add-hook 'c-mode-hook #'dx:activate-tabs)
(add-hook 'c++-mode-hook #'dx:activate-tabs)
#+END_SRC
*** Custom user style
Add a custom style which follows something like a 'Microsoft Style' in that it opens braces everywhere (for ease of reading).
#+BEGIN_SRC emacs-lisp
(c-add-style
"user"
'((c-basic-offset . 2)
(c-comment-only-line-offset . 0)
(c-hanging-braces-alist (brace-list-open)
(brace-entry-open)
(substatement-open after)
(block-close . c-snug-do-while)
(arglist-cont-nonempty))
(c-cleanup-list brace-else-brace)
(c-offsets-alist
(statement-block-intro . +)
(knr-argdecl-intro . 0)
(substatement-open . 0)
(substatement-label . 0)
(access-label . 0)
(label . 0)
(statement-cont . +))))
#+END_SRC
*** Set default styles
Set the default style for modes
#+BEGIN_SRC emacs-lisp
(setq c-default-style '((java-mode . "java")
(awk-mode . "awk")
(other . "user")))
#+END_SRC