folly 0.47.0 (new formula)

Closes Homebrew/homebrew#40947.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Formula/folly.rb

@@ -0,0 +1,46 @@
+class Folly < Formula
+  desc "A collection of reusable C++ library artifacts developed at Facebook"
+  homepage "https://github.com/facebook/folly"
+  url "https://github.com/facebook/folly/archive/v0.47.0.tar.gz"
+  sha256 "7d3309088cae1817d60996611e5fc0825c5c8df36d244f247c1d49ebc38c35fb"
+
+  depends_on "autoconf" => :build
+  depends_on "automake" => :build
+  depends_on "libtool" => :build
+
+  depends_on "double-conversion"
+  depends_on "glog"
+  depends_on "gflags"
+  depends_on "boost"
+  depends_on "libevent"
+
+  needs :cxx11
+  depends_on :macos => :mavericks
+
+  def install
+    ENV.cxx11
+    cd "folly" do
+      system "autoreconf", "-i"
+      system "./configure", "--prefix=#{prefix}"
+      system "make"
+      system "make", "install"
+    end
+  end
+
+  test do
+    (testpath/"test.cc").write <<-EOS.undent
+      #include <folly/FBVector.h>
+      int main() {
+        folly::fbvector<int> numbers({0, 1, 2, 3});
+        numbers.reserve(10);
+        for (int i = 4; i < 10; i++) {
+          numbers.push_back(i * 2);
+        }
+        assert(numbers[6] == 12);
+        return 0;
+      }
+    EOS
+    system ENV.cxx, "-std=c++11", "test.cc", "-L#{lib}", "-lfolly", "-o", "test"
+    system "./test"
+  end
+end