pprint 0.9.1

Closes #39448.

Signed-off-by: Izaak Beekman <zbeekman@gmail.com>

Formula/pprint.rb

@@ -0,0 +1,21 @@
+class Pprint < Formula
+  desc "Pretty printer for modern C++"
+  homepage "https://github.com/p-ranav/pprint"
+  url "https://github.com/p-ranav/pprint/archive/v0.9.1.tar.gz"
+  sha256 "b9cc0d42f7be4abbb50b2e3b6a89589c5399201a3dc1fd7cfa72d412afdb2f86"
+
+  depends_on :macos => :high_sierra # needs C++17
+
+  def install
+    include.install "include/pprint.hpp"
+    pkgshare.install "test"
+  end
+
+  test do
+    cp_r pkgshare/"test", testpath
+    cd "test" do
+      system ENV.cxx, "--std=c++17", "-I#{testpath}/test", "main.cpp", "-o", "tests"
+      system "./tests"
+    end
+  end
+end