Upgraded to fmt ver 5.2.0

include/spdlog/fmt/bundled/ostream.h

@@ -14,139 +14,123 @@
 FMT_BEGIN_NAMESPACE
 namespace internal {
 
-template<class Char>
-class formatbuf : public std::basic_streambuf<Char>
-{
-private:
-    typedef typename std::basic_streambuf<Char>::int_type int_type;
-    typedef typename std::basic_streambuf<Char>::traits_type traits_type;
-
-    basic_buffer<Char> &buffer_;
-
-public:
-    formatbuf(basic_buffer<Char> &buffer)
-        : buffer_(buffer)
-    {
-    }
-
-protected:
-    // The put-area is actually always empty. This makes the implementation
-    // simpler and has the advantage that the streambuf and the buffer are always
-    // in sync and sputc never writes into uninitialized memory. The obvious
-    // disadvantage is that each call to sputc always results in a (virtual) call
-    // to overflow. There is no disadvantage here for sputn since this always
-    // results in a call to xsputn.
-
-    int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE
-    {
-        if (!traits_type::eq_int_type(ch, traits_type::eof()))
-            buffer_.push_back(static_cast<Char>(ch));
-        return ch;
-    }
-
-    std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE
-    {
-        buffer_.append(s, s + count);
-        return count;
-    }
+template <class Char>
+class formatbuf : public std::basic_streambuf<Char> {
+ private:
+  typedef typename std::basic_streambuf<Char>::int_type int_type;
+  typedef typename std::basic_streambuf<Char>::traits_type traits_type;
+
+  basic_buffer<Char> &buffer_;
+
+ public:
+  formatbuf(basic_buffer<Char> &buffer) : buffer_(buffer) {}
+
+ protected:
+  // The put-area is actually always empty. This makes the implementation
+  // simpler and has the advantage that the streambuf and the buffer are always
+  // in sync and sputc never writes into uninitialized memory. The obvious
+  // disadvantage is that each call to sputc always results in a (virtual) call
+  // to overflow. There is no disadvantage here for sputn since this always
+  // results in a call to xsputn.
+
+  int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE {
+    if (!traits_type::eq_int_type(ch, traits_type::eof()))
+      buffer_.push_back(static_cast<Char>(ch));
+    return ch;
+  }
+
+  std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE {
+    buffer_.append(s, s + count);
+    return count;
+  }
 };
 
-template<typename Char>
-struct test_stream : std::basic_ostream<Char>
-{
-private:
-    struct null;
-    // Hide all operator<< from std::basic_ostream<Char>.
-    void operator<<(null);
+template <typename Char>
+struct test_stream : std::basic_ostream<Char> {
+ private:
+  struct null;
+  // Hide all operator<< from std::basic_ostream<Char>.
+  void operator<<(null);
 };
 
-// Checks if T has a user-defined operator<< (e.g. not a member of
-// std::ostream).
-template<typename T, typename Char>
-class is_streamable
-{
-private:
-    template<typename U>
-    static decltype(internal::declval<test_stream<Char> &>() << internal::declval<U>(), std::true_type()) test(int);
-
-    template<typename>
-    static std::false_type test(...);
-
-    typedef decltype(test<T>(0)) result;
-
-public:
-    // std::string operator<< is not considered user-defined because we handle
-    // strings
-    // specially.
-    static const bool value = result::value && !std::is_same<T, std::string>::value;
-};
+// Checks if T has a user-defined operator<< (e.g. not a member of std::ostream).
+template <typename T, typename Char>
+class is_streamable {
+ private:
+  template <typename U>
+  static decltype(
+    internal::declval<test_stream<Char>&>()
+      << internal::declval<U>(), std::true_type()) test(int);
 
-// Disable conversion to int if T has an overloaded operator<< which is a free
-// function (not a member of std::ostream).
-template<typename T, typename Char>
-class convert_to_int<T, Char, true>
-{
-public:
-    static const bool value = convert_to_int<T, Char, false>::value && !is_streamable<T, Char>::value;
+  template <typename>
+  static std::false_type test(...);
+
+  typedef decltype(test<T>(0)) result;
+
+ public:
+  static const bool value = result::value;
 };
 
 // Write the content of buf to os.
-template<typename Char>
-void write(std::basic_ostream<Char> &os, basic_buffer<Char> &buf)
-{
-    const Char *data = buf.data();
-    typedef std::make_unsigned<std::streamsize>::type UnsignedStreamSize;
-    UnsignedStreamSize size = buf.size();
-    UnsignedStreamSize max_size = internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
-    do
-    {
-        UnsignedStreamSize n = size <= max_size ? size : max_size;
-        os.write(data, static_cast<std::streamsize>(n));
-        data += n;
-        size -= n;
-    } while (size != 0);
+template <typename Char>
+void write(std::basic_ostream<Char> &os, basic_buffer<Char> &buf) {
+  const Char *data = buf.data();
+  typedef std::make_unsigned<std::streamsize>::type UnsignedStreamSize;
+  UnsignedStreamSize size = buf.size();
+  UnsignedStreamSize max_size =
+      internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
+  do {
+    UnsignedStreamSize n = size <= max_size ? size : max_size;
+    os.write(data, static_cast<std::streamsize>(n));
+    data += n;
+    size -= n;
+  } while (size != 0);
 }
 
-template<typename Char, typename T>
-void format_value(basic_buffer<Char> &buffer, const T &value)
-{
-    internal::formatbuf<Char> format_buf(buffer);
-    std::basic_ostream<Char> output(&format_buf);
-    output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
-    output << value;
-    buffer.resize(buffer.size());
+template <typename Char, typename T>
+void format_value(basic_buffer<Char> &buffer, const T &value) {
+  internal::formatbuf<Char> format_buf(buffer);
+  std::basic_ostream<Char> output(&format_buf);
+  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+  output << value;
+  buffer.resize(buffer.size());
 }
+}  // namespace internal
 
-// Disable builtin formatting of enums and use operator<< instead.
-template<typename T>
-struct format_enum<T, typename std::enable_if<std::is_enum<T>::value>::type> : std::false_type
-{
+// Disable conversion to int if T has an overloaded operator<< which is a free
+// function (not a member of std::ostream).
+template <typename T, typename Char>
+struct convert_to_int<T, Char, void> {
+  static const bool value =
+    convert_to_int<T, Char, int>::value &&
+    !internal::is_streamable<T, Char>::value;
 };
-} // namespace internal
 
 // Formats an object of type T that has an overloaded ostream operator<<.
-template<typename T, typename Char>
-struct formatter<T, Char, typename std::enable_if<internal::is_streamable<T, Char>::value>::type> : formatter<basic_string_view<Char>, Char>
-{
-
-    template<typename Context>
-    auto format(const T &value, Context &ctx) -> decltype(ctx.out())
-    {
-        basic_memory_buffer<Char> buffer;
-        internal::format_value(buffer, value);
-        basic_string_view<Char> str(buffer.data(), buffer.size());
-        formatter<basic_string_view<Char>, Char>::format(str, ctx);
-        return ctx.out();
-    }
+template <typename T, typename Char>
+struct formatter<T, Char,
+    typename std::enable_if<
+      internal::is_streamable<T, Char>::value &&
+      !internal::format_type<
+        typename buffer_context<Char>::type, T>::value>::type>
+    : formatter<basic_string_view<Char>, Char> {
+
+  template <typename Context>
+  auto format(const T &value, Context &ctx) -> decltype(ctx.out()) {
+    basic_memory_buffer<Char> buffer;
+    internal::format_value(buffer, value);
+    basic_string_view<Char> str(buffer.data(), buffer.size());
+    return formatter<basic_string_view<Char>, Char>::format(str, ctx);
+  }
 };
 
-template<typename Char>
-inline void vprint(
-    std::basic_ostream<Char> &os, basic_string_view<Char> format_str, basic_format_args<typename buffer_context<Char>::type> args)
-{
-    basic_memory_buffer<Char> buffer;
-    vformat_to(buffer, format_str, args);
-    internal::write(os, buffer);
+template <typename Char>
+inline void vprint(std::basic_ostream<Char> &os,
+                   basic_string_view<Char> format_str,
+                   basic_format_args<typename buffer_context<Char>::type> args) {
+  basic_memory_buffer<Char> buffer;
+  vformat_to(buffer, format_str, args);
+  internal::write(os, buffer);
 }
 /**
   \rst
@@ -157,17 +141,17 @@ inline void vprint(
     fmt::print(cerr, "Don't {}!", "panic");
   \endrst
  */
-template<typename... Args>
-inline void print(std::ostream &os, string_view format_str, const Args &... args)
-{
-    vprint<char>(os, format_str, make_format_args<format_context>(args...));
+template <typename... Args>
+inline void print(std::ostream &os, string_view format_str,
+                  const Args & ... args) {
+  vprint<char>(os, format_str, make_format_args<format_context>(args...));
 }
 
-template<typename... Args>
-inline void print(std::wostream &os, wstring_view format_str, const Args &... args)
-{
-    vprint<wchar_t>(os, format_str, make_format_args<wformat_context>(args...));
+template <typename... Args>
+inline void print(std::wostream &os, wstring_view format_str,
+                  const Args & ... args) {
+  vprint<wchar_t>(os, format_str, make_format_args<wformat_context>(args...));
 }
 FMT_END_NAMESPACE
 
-#endif // FMT_OSTREAM_H_
+#endif  // FMT_OSTREAM_H_