SERVER-18579: Add .clang-format & Scons support

1 files changed, 171 insertions, 0 deletions

diff --git a/etc/format_sample.cpp b/etc/format_sample.cpp
new file mode 100644
index 00000000000..b5b98b5ebc9
--- /dev/null
+++ b/etc/format_sample.cpp
@@ -0,0 +1,171 @@
+/**
+ * Sample file to demonstrate various clang-format messages
+ */
+#include <stdio.h>
+#include <vector>
+#include <string>
+
+// NamespaceIndentation: None
+namespace foo {
+// Contents of namespace are not indented.
+int foo;
+
+namespace bar {
+int bar;
+
+namespace {
+int anony;
+}  // namespace anony
+
+}  // namespace bar
+
+/**
+ * A Class comment
+ */
+class Example {
+    // AccessModiferOffset: -4
+public:
+    // BreakConstructorInitializersBeforeComma: false
+    // ConstructorInitializerAllOnOneLineOrOnePerLine: true
+    //
+    Example() : _aVariable(4), _bVariable(42) {}
+    Example(int a)
+        : _aVariable(a),
+          _bVariable(42),
+          _AReallyReallyLongVariableName(4),
+          _AnotherReallyReallyLongVariableNameToTriggerWrapping(42) {
+        printf("Hello ");
+    }
+    ~Example() {}
+
+    /**
+     * A Function comment
+     * AllowShortFunctionsOnASingleLine: Empty
+     */
+    int getOneLineFunction() {
+        return 0;
+    }
+
+    /** A Incorrect Function comment
+     * AllowShortFunctionsOnASingleLine: Empty
+     */
+    void doNothing() {}
+
+    /**
+     * A Useful Function comment
+     */
+    int manyVariableFunction(unsigned long long arg1, char arg2, unsigned long long arg3);
+
+private:
+    int _aVariable;
+    long _bVariable;
+    short _cVarianble = 49;
+    long _AReallyReallyLongVariableName;
+    long _AnotherReallyReallyLongVariableNameToTriggerWrapping;
+};
+
+int foo3() {
+    return 42;
+}
+
+// AlwaysBreakTemplateDeclarations: true
+template <typename T>
+T myAdd(T x, T y) {
+    return x + y;
+}
+
+// AlwaysBreakAfterDefinitionReturnType: false
+// BinPackParameters: false
+int Example::manyVariableFunction(unsigned long long argWithLongName,
+                                  char arg2,
+                                  unsigned long long argWithAnotherLongName) {
+    // 3.7 - AlignConsecutiveAssignments - false
+    //
+    int aaaa = 12;
+    int b = 23;
+    int ccc = 23;
+    // PointerAlignment: Left
+    const char* some_pointer = "Hello";
+
+    // SpacesInAngles: false
+    std::vector<std::pair<std::string, int>> list;
+
+    // SpaceAfterCStyleCast: false
+    // SpacesInCStyleCastParentheses: false
+    char* some_nonconst_pointer = (char*)some_pointer;
+
+    // Multi-line if
+    // SpaceBeforeParens: False
+    if (argWithLongName == 0) {  // Comment: SpacesBeforeTrailingComments
+        // Do something
+    } else if (b % 7 = 3) {
+    }  // some weird trailing else comment that clang-format does not touch
+    else {
+        // Notice the indent around else
+    }
+
+    // AllowShortIfStatementsOnASingleLine: false
+    // Put statements on separate lines for short ifs
+    if (arg2 == 'a')
+        arg2 = 'b';
+
+    int bbbbbbbbbbbbbbbbbbbbbbbbbbbb, cccccccccccccccccccccccccccccc;
+    int aaaaaaaaaaaaaaaaaaaaaaaaaaaa =
+        bbbbbbbbbbbbbbbbbbbbbbbbbbbb + cccccccccccccccccccccccccccccc;
+
+    // AlignOperands
+    int dddddddddddddddddddddddddddd = aaaaaaaaaaaaaaaaaaaaaaaaaaaa * 7 + 4 % 235124 > 275645
+        ? bbbbbbbbbbbbbbbbbbbbbbbbbbbb + 897234
+        : cccccccccccccccccccccccccccccc % 1293402;
+
+    // AllowShortBlocksOnASingleLine: false
+    if (b) {
+        return 3;
+    }
+
+    // AllowShortLoopsOnASingleLine: false
+    while (b < 5)
+        b++;
+
+    // BreakBeforeBinaryOperators: None
+    if (b > 5 || b % 42 || cccccccccccccccccccccccccccccc % 873 || aaaa * 12312 % 23485 != 9873 ||
+        some_pointer != 0) {
+        printf("Huh!\n");
+    }
+
+    // AlignAfterOpenBracket: false
+    // BinPackParameters: false
+    printf("A short function call %s %s %d - %ld\n", "", "tgz", 4, ULONG_MAX);
+    printf("A long function call %s %s %d - %ld\n",
+           "http://www.mongodbo.org/downloads",
+           "mongodb-latest.tgz",
+           4,
+           ULONG_MAX);
+    printf("Thing1 %s\n", "Thing2");
+
+    // No spaces between parens and args
+    printf("%c\n", arg2);
+
+    // A switch statement: TODO: Andy, what is the indent we want? Google style?
+    switch (arg2) {
+        // AllowShortCaseLabelsOnASingleLine: false
+        // IndentCaseLabels: true
+        case 'a':
+            return 2;
+        case 'y':
+        case 'z':
+            // Do something here
+            break;
+        default:
+            // The default`
+            break;
+    }
+
+    do {
+        // Do a loop here
+    } while (0);
+
+    return 1;
+}
+
+}  // namespace foo