c++-mode: more snippets

Author: hlissner

c++-mode/.yas-setup.el

@@ -0,0 +1,18 @@
+;; -*- mode: emacs-lisp-mode; -*-
+
+(defun doom-snippets-c++-using-std-p ()
+  "Return non-nil if 'using namespace std' is found at the top of this file."
+  (save-excursion
+    (goto-char (point-max))
+    (or (search-forward "using namespace std;" 512 t)
+        (search-forward "std::" 1024 t))))
+
+(defun doom-snippets-c++-class-name (str)
+  "Search for a class name like `DerivedClass' in STR
+(which may look like `DerivedClass : ParentClass1, ParentClass2, ...')
+If found, the class name is returned, otherwise STR is returned"
+  (yas-substr str "[^: ]*"))
+
+(defun doom-snippets-c++-class-method-decl-choice ()
+  "Choose and return the end of a C++11 class method declaration"
+  (yas-choose-value '(";" " = default;" " = delete;")))

c++-mode/accumulate

@@ -0,0 +1,5 @@
+# -*- mode: snippet -*-
+# name: accumulate
+# key: acm
+# --
+auto sum = std::accumulate(std::begin(${1:container}), std::end($1), 0);

c++-mode/accumulate-with-closure

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: accumulate w/ closure
+# key: acl
+# --
+auto sum = std::accumulate(std::begin(${1:container}), std::end($1), 0, [](int total, $2) {
+  `%`$3
+});

c++-mode/adjacent_find

@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: adjacent_find
+# key: ajf
+# --
+auto pos = std::adjacent_find(std::begin(${1:container}), std::end($1));
+if (pos != std::end($1)) {
+  $2
+}

c++-mode/all_of

@@ -0,0 +1,9 @@
+# -*- mode: snippet -*-
+# name: all_of
+# key: alo
+# --
+if (std::all_of(std::begin(${1:container}), std::end($1), []($2) {
+  `%`$3
+})) {
+  $4
+}

c++-mode/any_of

@@ -0,0 +1,9 @@
+# -*- mode: snippet -*-
+# name: any_of
+# key: ano
+# --
+if (std::any_of(std::begin(${1:container}), std::end($1), []($2) {
+  `%`$3
+})) {
+  $4
+}

c++-mode/cerr

@@ -3,4 +3,5 @@
 # key: err
 # uuid: err
 # --
-cerr << $0;
+`(setq --cpp-ns (if (doom-snippets-c++-using-std-p) "" "std::"))
+cerr` << `%`$1 << `--cpp-ns`endl;`(progn (makunbound '--cpp-ns) "")`

c++-mode/cin

@@ -1,5 +1,5 @@
 # -*- mode: snippet -*-
 # name: cin
 # --
-`(setq --cpp-ns (if (search "using namespace std;" (buffer-string)) "" "std::"))
---cpp-ns`cin >> ${1:string};`(progn (makunbound '--cpp-ns) "")`
+`(setq --cpp-ns (if (doom-snippets-c++-using-std-p) "" "std::"))
+--cpp-ns`cin >> ${1:string};

c++-mode/class11

@@ -0,0 +1,44 @@
+# -*- mode: snippet -*-
+# name: class11
+# key: cls11
+# group: c++11
+# uuid: d7c41f87-9b8a-479d-bb12-89f4cbdd46a7
+# contributor: Ved Vyas
+# desc: Snippet for C++11 classes based on c++-mode/class. Allows for Rule of
+# [0, All]. A choice between ";", " = default;", and " = delete;" is presented
+# for each method. The methods and some of the optional keywords/specifiers are
+# exposed as fields that users can easily skip-and-clear.
+# Hackish query-replace-regexp to renumber non-mirror fields in the region
+# between public and protected (can use N as a field number in the snippet):
+# \${[0-9N]*:\([^\$]\) -> ${\,(+ 2 \#):\1
+# References:
+# 1. http://en.cppreference.com/w/cpp/language/rule_of_three#Rule_of_five
+# 2. https://en.wikipedia.org/wiki/Rule_of_three_%28C%2B%2B_programming%29#Example_in_C.2B.2B
+# 3. http://stackoverflow.com/a/4782927
+# --
+class ${1:Name}
+{
+public:
+${2:  ${3://! Default constructor
+  }${1:$(doom-snippets-c++-class-name yas-text)}()${4:;$(doom-snippets-c++-class-method-decl-choice)}
+
+}${5:  ${6://! Copy constructor
+  }${1:$(doom-snippets-c++-class-name yas-text)}(const ${1:$(doom-snippets-c++-class-name yas-text)} &other)${7:;$(doom-snippets-c++-class-method-decl-choice)}
+
+}${8:  ${9://! Move constructor
+  }${1:$(doom-snippets-c++-class-name yas-text)}(${1:$(doom-snippets-c++-class-name yas-text)} &&other)${10: noexcept}${11:;$(doom-snippets-c++-class-method-decl-choice)}
+
+}${12:  ${13://! Destructor
+  }${14:virtual }~${1:$(doom-snippets-c++-class-name yas-text)}()${15: noexcept}${16:;$(doom-snippets-c++-class-method-decl-choice)}
+
+}${17:  ${18://! Copy assignment operator
+  }${1:$(doom-snippets-c++-class-name yas-text)}& operator=(const ${1:$(doom-snippets-c++-class-name yas-text)} &other)${19:;$(doom-snippets-c++-class-method-decl-choice)}
+
+}${20:  ${21://! Move assignment operator
+  }${1:$(doom-snippets-c++-class-name yas-text)}& operator=(${1:$(doom-snippets-c++-class-name yas-text)} &&other)${22: noexcept}${23:;$(doom-snippets-c++-class-method-decl-choice)}
+
+}$0
+
+protected:
+private:
+};

c++-mode/copy

@@ -0,0 +1,5 @@
+# -*- mode: snippet -*-
+# name: copy
+# key: cpy
+# --
+std::copy(std::begin(${1:container}), std::end($1), std::begin($2));