From 365a80c9acaab2a7d23a40a3add7071f9b739f85 Mon Sep 17 00:00:00 2001
From: mandreyel <mandreyel@protonmail.com>
Date: Thu, 18 Oct 2018 19:30:41 +0200
Subject: [PATCH] Fix char* being an invalid path type

---
 include/mio/detail/string_util.hpp | 15 +++++++++++++--
 test/test.cpp                      |  6 +++++-
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/include/mio/detail/string_util.hpp b/include/mio/detail/string_util.hpp
index 31cae45..c716325 100644
--- a/include/mio/detail/string_util.hpp
+++ b/include/mio/detail/string_util.hpp
@@ -26,10 +26,21 @@
 namespace mio {
 namespace detail {
 
-template<typename String> struct is_c_str
+template <typename String>
+struct is_c_str
 {
     static constexpr bool value = std::is_same<
-        const char*, typename std::decay<String>::type
+        char*,
+        // TODO: I'm so sorry for this... Can this be made cleaner?
+        typename std::add_pointer<
+            typename std::remove_cv<
+                typename std::remove_pointer<
+                    typename std::decay<
+                        String
+                    >::type
+                >::type
+            >::type
+        >::type
     >::value;
 };
 
diff --git a/test/test.cpp b/test/test.cpp
index acfd33c..aacae81 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -22,7 +22,11 @@ using mmap_source = mio::basic_mmap_source<std::byte>;
 
 int main()
 {
-    const char* path = "test-file";
+    const char _path[] = "test-file";
+    // Make sure mio compiles with non-const char* strings too.
+    const int path_len = sizeof(_path);
+    char* path = new char[path_len];
+    std::copy(_path, _path + path_len, path);
     std::error_code error;
     // Fill buffer, then write it to file.
     std::string buffer(0x4000 - 250, 'M');