From 8cc0d689d19501ab95fb2809506121513d79fd13 Mon Sep 17 00:00:00 2001
From: Dominik Charousset <dominik@charousset.de>
Date: Sun, 16 Jun 2024 15:22:52 +0200
Subject: [PATCH] Fix build on MSVC

---
 libbroker/broker/convert.hh               |  5 +++--
 libbroker/broker/detail/sqlite_backend.cc |  3 +--
 libbroker/broker/detail/type_traits.hh    | 15 +++++++++++++++
 libbroker/broker/logger.hh                |  3 +++
 libbroker/broker/master.test.cc           | 21 +++++++++++----------
 5 files changed, 33 insertions(+), 14 deletions(-)

diff --git a/libbroker/broker/convert.hh b/libbroker/broker/convert.hh
index 0fe5bb8c..41177ddd 100644
--- a/libbroker/broker/convert.hh
+++ b/libbroker/broker/convert.hh
@@ -130,8 +130,9 @@ template <class T>
 std::enable_if_t<
   detail::has_convert_v<T, std::string> // must have a convert function
     && !std::is_arithmetic_v<T> // avoid ambiguitiy with default overloads
-    && !std::is_convertible_v<T, std::string>, // avoid ambiguity with
-                                               // conversion-to-string
+    && !std::is_convertible_v<T, std::string> // avoid ambiguity with
+                                              // conversion-to-string
+    && !std::is_same_v<T, std::string_view>,
   std::ostream&>
 operator<<(std::ostream& os, const T& x) {
   std::string str;
diff --git a/libbroker/broker/detail/sqlite_backend.cc b/libbroker/broker/detail/sqlite_backend.cc
index bc0d1e64..d3a7dbe9 100644
--- a/libbroker/broker/detail/sqlite_backend.cc
+++ b/libbroker/broker/detail/sqlite_backend.cc
@@ -282,8 +282,7 @@ struct sqlite_backend::impl {
     if (!dir.empty()) {
       if (!detail::is_directory(dir) && !detail::mkdirs(dir)) {
         log::store::error("sqlite-create-dir-failed",
-                          "failed to create directory for database: {}",
-                          dir.c_str());
+                          "failed to create directory for database: {}", dir);
         return false;
       }
     }
diff --git a/libbroker/broker/detail/type_traits.hh b/libbroker/broker/detail/type_traits.hh
index f727c82e..97b8dc8e 100644
--- a/libbroker/broker/detail/type_traits.hh
+++ b/libbroker/broker/detail/type_traits.hh
@@ -248,6 +248,21 @@ public:
   static constexpr bool value = std::is_same_v<result, std::string>;
 };
 
+// Trait that checks whether a type has a .string() member function.
+template <class T>
+class has_string_member_fn {
+private:
+  template <class U>
+  static auto sfinae(const U& x) -> decltype(x.string());
+
+  static void sfinae(...);
+
+  using result = std::decay_t<decltype(sfinae(std::declval<const T&>()))>;
+
+public:
+  static constexpr bool value = std::is_same_v<result, std::string>;
+};
+
 } // namespace broker::detail
 
 #define BROKER_DEF_HAS_ENCODE_IN_NS(ns_name)                                   \
diff --git a/libbroker/broker/logger.hh b/libbroker/broker/logger.hh
index 7df2f9ec..c5118c2d 100644
--- a/libbroker/broker/logger.hh
+++ b/libbroker/broker/logger.hh
@@ -97,6 +97,9 @@ OutputIterator fmt_to(OutputIterator out, std::string_view fmt, const T& arg,
           } else if constexpr (has_to_string<T>::value) {
             auto str = to_string(arg);
             out = std::copy(str.begin(), str.end(), out);
+          } else if constexpr (has_string_member_fn<T>::value) {
+            auto&& str = arg.string();
+            out = std::copy(str.begin(), str.end(), out);
           } else {
             static_assert(std::is_convertible_v<T, const char*>);
             for (auto cstr = arg; *cstr != '\0'; ++cstr)
diff --git a/libbroker/broker/master.test.cc b/libbroker/broker/master.test.cc
index 9016586f..f0e48ac3 100644
--- a/libbroker/broker/master.test.cc
+++ b/libbroker/broker/master.test.cc
@@ -85,7 +85,7 @@ bool operator==(const string_list& xs, const pattern_list& ys) {
 }
 
 struct fixture : base_fixture {
-  string_list log;
+  string_list log_lines;
   worker logger;
 
   caf::timespan tick_interval = defaults::store::tick_interval;
@@ -100,11 +100,11 @@ struct fixture : base_fixture {
       [this](data_message msg) {
         auto content = get_data(msg).to_data();
         if (auto insert = store_event::insert::make(content))
-          log.emplace_back(to_string(insert));
+          log_lines.emplace_back(to_string(insert));
         else if (auto update = store_event::update::make(content))
-          log.emplace_back(to_string(update));
+          log_lines.emplace_back(to_string(update));
         else if (auto erase = store_event::erase::make(content))
-          log.emplace_back(to_string(erase));
+          log_lines.emplace_back(to_string(erase));
         else
           FAIL("unknown event: " << to_string(content));
       },
@@ -162,12 +162,13 @@ TEST(local_master) {
   CHECK_EQUAL(unbox(ds.put_unique("bar", "unicorn")), data{false});
   // check log
   run(tick_interval);
-  CHECK_EQUAL(log, pattern_list({
-                     "insert\\(foo, hello, world, (null|none), .+\\)",
-                     "update\\(foo, hello, world, universe, (null|none), .+\\)",
-                     "erase\\(foo, hello, .+\\)",
-                     "insert\\(foo, bar, baz, .+\\)",
-                   }));
+  CHECK_EQUAL(log_lines,
+              pattern_list({
+                "insert\\(foo, hello, world, (null|none), .+\\)",
+                "update\\(foo, hello, world, universe, (null|none), .+\\)",
+                "erase\\(foo, hello, .+\\)",
+                "insert\\(foo, bar, baz, .+\\)",
+              }));
   // done
   caf::anon_send_exit(core, caf::exit_reason::user_shutdown);
 }