clang-format: [JS] Don't indent JavaScript IIFEs.

Because IIFEs[1] are often used like an anonymous namespace around large
sections of JavaScript code, it's useful not to indent to them (which
effectively reduces the column limit by the indent amount needlessly).

It's also common for developers to wrap these around entire files or
libraries. When adopting clang-format, changing the indent entire file
can reduce the usefulness of the blame annotations.

Patch by danbeam, thanks!

Differential Revision: https://reviews.llvm.org/D32989

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@302580 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 0 deletions

diff --git a/unittests/Format/FormatTestJS.cpp b/unittests/Format/FormatTestJS.cpp
index 288975374d..05aee91a1d 100644
--- a/unittests/Format/FormatTestJS.cpp
+++ b/unittests/Format/FormatTestJS.cpp
@@ -367,6 +367,25 @@ TEST_F(FormatTestJS, GoogScopes) {
                "});");
 }
 
+TEST_F(FormatTestJS, IIFEs) {
+  // Internal calling parens; no semi.
+  verifyFormat("(function() {\n"
+               "var a = 1;\n"
+               "}())");
+  // External calling parens; no semi.
+  verifyFormat("(function() {\n"
+               "var b = 2;\n"
+               "})()");
+  // Internal calling parens; with semi.
+  verifyFormat("(function() {\n"
+               "var c = 3;\n"
+               "}());");
+  // External calling parens; with semi.
+  verifyFormat("(function() {\n"
+               "var d = 4;\n"
+               "})();");
+}
+
 TEST_F(FormatTestJS, GoogModules) {
   verifyFormat("goog.module('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));