From 6a720b4d0c6efac75cc2c888992947332d5eebaf Mon Sep 17 00:00:00 2001
From: greg <greg7mdp@gmail.com>
Date: Fri, 5 Apr 2019 21:10:02 -0400
Subject: [PATCH] add an example with two separate compilation units

---
 CMakeLists.txt |  7 ++++---
 examples/f1.cc | 25 +++++++++++++++++++++++++
 examples/f2.cc | 23 +++++++++++++++++++++++
 3 files changed, 52 insertions(+), 3 deletions(-)
 create mode 100644 examples/f1.cc
 create mode 100644 examples/f2.cc

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c94369d..01c97ae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -108,9 +108,10 @@ if (PHMAP_BUILD_TESTS)
 endif()
 
 if (PHMAP_BUILD_EXAMPLES)
-    add_executable(basic examples/basic.cc)
-    add_executable(emplace examples/emplace.cc)
-    add_executable(hash_std examples/hash_std.cc)
+    add_executable(ex_basic examples/basic.cc)
+    add_executable(ex_emplace examples/emplace.cc)
+    add_executable(ex_hash_std examples/hash_std.cc)
+    add_executable(ex_two_files examples/f1.cc examples/f2.cc)
 endif()
 
 
diff --git a/examples/f1.cc b/examples/f1.cc
new file mode 100644
index 0000000..9cec278
--- /dev/null
+++ b/examples/f1.cc
@@ -0,0 +1,25 @@
+/*
+ * Make sure that the phmap.h header builds fine when included in two separate 
+ * source files
+ */
+#include <string>
+#include <parallel_hashmap/phmap.h>
+
+using phmap::flat_hash_map;
+ 
+int main()
+{
+    // Create an unordered_map of three strings (that map to strings)
+    using Map = flat_hash_map<std::string, std::string>;
+    Map email = 
+    {
+        { "tom",  "tom@gmail.com"},
+        { "jeff", "jk@gmail.com"},
+        { "jim",  "jimg@microsoft.com"}
+    };
+ 
+    extern void f2(Map&);
+    f2(email);
+ 
+    return 0;
+}
diff --git a/examples/f2.cc b/examples/f2.cc
new file mode 100644
index 0000000..eca567e
--- /dev/null
+++ b/examples/f2.cc
@@ -0,0 +1,23 @@
+/*
+ * Make sure that the phmap.h header builds fine when included in two separate 
+ * source files
+ */
+#include <iostream>
+#include <string>
+#include <parallel_hashmap/phmap.h>
+
+using phmap::flat_hash_map;
+using Map = flat_hash_map<std::string, std::string>;
+
+void f2(Map& email)
+{
+    // Iterate and print keys and values 
+    for (const auto& n : email) 
+        std::cout << n.first << "'s email is: " << n.second << "\n";
+ 
+    // Add a new entry
+    email["bill"] = "bg@whatever.com";
+ 
+    // and print it
+    std::cout << "bill's email is: " << email["bill"] << "\n";
+}