Added yasnippets.

init.el

@@ -1,5 +1,5 @@
 ;;; init.el --- tastytea's Emacs init file.
-;; Time-stamp: <2019-08-06T22:03:53+00:00>
+;; Time-stamp: <2019-08-07T09:37:23+00:00>
 
 ;;; Commentary:
 ;; I am using this file with Emacs 26, but most of it will probably work with
@@ -366,6 +366,16 @@ With argument, do this that many times."
   :config
   (editorconfig-mode 1))
 
+;; A template system.
+(use-package yasnippet
+  :hook
+  (prog-mode . yas-minor-mode)
+  )
+
+;; Install snippet-collection.
+(use-package yasnippet-snippets
+  :after yasnippet)
+
 ;;;;;;;;;;;;;;;;;;;; Programming / C++ ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Set coding style.
 (use-package cc-mode
@@ -817,9 +827,6 @@ With argument, do this that many times."
   ("C-x M-h" . easy-hugo)
   )
 
-;; A template system.
-(use-package yasnippet)
-
 ;; Automatically insert text in new files.
 (use-package autoinsert
   :after yasnippet

snippets/cc-mode/case

@@ -0,0 +1,10 @@
+# -*- mode: snippet -*-
+# name: case : {...}
+# key: case
+# expand-env: ((yas-also-auto-indent-first-line t))
+# --
+case ${2:constexpr}:
+{
+    $0
+    break;
+}

snippets/cc-mode/switch

@@ -0,0 +1,16 @@
+# -*- mode: snippet -*-
+# name: switch (...) { case : ... default: ...}
+# key: switch
+# --
+switch (${1:expr})
+{
+case ${2:constexpr}:
+{
+    $0
+    break;
+}
+default:
+{
+    break;
+}
+}