#ifndef FMT_OSTREAM_H_
#define FMT_OSTREAM_H_
+#include <fstream>
#include <ostream>
+#if defined(_WIN32) && defined(__GLIBCXX__)
+# include <ext/stdio_filebuf.h>
+# include <ext/stdio_sync_filebuf.h>
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+# include <__std_stream>
+#endif
#include "format.h"
enable_if_t<
std::is_arithmetic<T>::value || std::is_array<T>::value ||
std::is_pointer<T>::value || std::is_same<T, char8_type>::value ||
- std::is_same<T, std::basic_string<Char>>::value ||
+ std::is_convertible<T, fmt::basic_string_view<Char>>::value ||
std::is_same<T, std_string_view<Char>>::value ||
(std::is_convertible<T, int>::value && !std::is_enum<T>::value)>>
: std::false_type {};
+// Generate a unique explicit instantion in every translation unit using a tag
+// type in an anonymous namespace.
+namespace {
+struct file_access_tag {};
+} // namespace
+template <class Tag, class BufType, FILE* BufType::*FileMemberPtr>
+class file_access {
+ friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
+};
+
+#if FMT_MSC_VERSION
+template class file_access<file_access_tag, std::filebuf,
+ &std::filebuf::_Myfile>;
+auto get_file(std::filebuf&) -> FILE*;
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+template class file_access<file_access_tag, std::__stdoutbuf<char>,
+ &std::__stdoutbuf<char>::__file_>;
+auto get_file(std::__stdoutbuf<char>&) -> FILE*;
+#endif
+
+inline bool write_ostream_unicode(std::ostream& os, fmt::string_view data) {
+#if FMT_MSC_VERSION
+ if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#elif defined(_WIN32) && defined(__GLIBCXX__)
+ auto* rdbuf = os.rdbuf();
+ FILE* c_file;
+ if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
+ c_file = fbuf->file();
+ else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
+ c_file = fbuf->file();
+ else
+ return false;
+ if (c_file) return write_console(c_file, data);
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+ if (auto* buf = dynamic_cast<std::__stdoutbuf<char>*>(os.rdbuf()))
+ if (FILE* f = get_file(*buf)) return write_console(f, data);
+#else
+ ignore_unused(os, data);
+#endif
+ return false;
+}
+inline bool write_ostream_unicode(std::wostream&,
+ fmt::basic_string_view<wchar_t>) {
+ return false;
+}
+
// Write the content of buf to os.
// It is a separate function rather than a part of vprint to simplify testing.
template <typename Char>
#endif
output << value;
output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
- buf.try_resize(buf.size());
}
+template <typename T> struct streamed_view { const T& value; };
+
+} // namespace detail
+
// Formats an object of type T that has an overloaded ostream operator<<.
-template <typename T, typename Char>
-struct fallback_formatter<T, Char, enable_if_t<is_streamable<T, Char>::value>>
- : private formatter<basic_string_view<Char>, Char> {
- using formatter<basic_string_view<Char>, Char>::parse;
+template <typename Char>
+struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
+ void set_debug_format() = delete;
- template <typename OutputIt>
- auto format(const T& value, basic_format_context<OutputIt, Char>& ctx)
+ template <typename T, typename OutputIt>
+ auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
-> OutputIt {
auto buffer = basic_memory_buffer<Char>();
format_value(buffer, value, ctx.locale());
return formatter<basic_string_view<Char>, Char>::format(
{buffer.data(), buffer.size()}, ctx);
}
+};
+
+using ostream_formatter = basic_ostream_formatter<char>;
- // DEPRECATED!
+template <typename T, typename Char>
+struct formatter<detail::streamed_view<T>, Char>
+ : basic_ostream_formatter<Char> {
template <typename OutputIt>
- auto format(const T& value, basic_printf_context<OutputIt, Char>& ctx)
- -> OutputIt {
- auto buffer = basic_memory_buffer<Char>();
- format_value(buffer, value, ctx.locale());
- return std::copy(buffer.begin(), buffer.end(), ctx.out());
+ auto format(detail::streamed_view<T> view,
+ basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+ return basic_ostream_formatter<Char>::format(view.value, ctx);
}
};
+
+/**
+ \rst
+ Returns a view that formats `value` via an ostream ``operator<<``.
+
+ **Example**::
+
+ fmt::print("Current thread id: {}\n",
+ fmt::streamed(std::this_thread::get_id()));
+ \endrst
+ */
+template <typename T>
+auto streamed(const T& value) -> detail::streamed_view<T> {
+ return {value};
+}
+
+namespace detail {
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename T, typename Char>
+struct fallback_formatter<T, Char, enable_if_t<is_streamable<T, Char>::value>>
+ : basic_ostream_formatter<Char> {
+ using basic_ostream_formatter<Char>::format;
+};
+
+inline void vprint_directly(std::ostream& os, string_view format_str,
+ format_args args) {
+ auto buffer = memory_buffer();
+ detail::vformat_to(buffer, format_str, args);
+ detail::write_buffer(os, buffer);
+}
+
} // namespace detail
-FMT_MODULE_EXPORT
-template <typename Char>
-void vprint(std::basic_ostream<Char>& os, basic_string_view<Char> format_str,
+FMT_MODULE_EXPORT template <typename Char>
+void vprint(std::basic_ostream<Char>& os,
+ basic_string_view<type_identity_t<Char>> format_str,
basic_format_args<buffer_context<type_identity_t<Char>>> args) {
auto buffer = basic_memory_buffer<Char>();
detail::vformat_to(buffer, format_str, args);
+ if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
detail::write_buffer(os, buffer);
}
fmt::print(cerr, "Don't {}!", "panic");
\endrst
*/
+FMT_MODULE_EXPORT template <typename... T>
+void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
+ const auto& vargs = fmt::make_format_args(args...);
+ if (detail::is_utf8())
+ vprint(os, fmt, vargs);
+ else
+ detail::vprint_directly(os, fmt, vargs);
+}
+
FMT_MODULE_EXPORT
-template <typename S, typename... Args,
- typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
-void print(std::basic_ostream<Char>& os, const S& format_str, Args&&... args) {
- vprint(os, to_string_view(format_str),
- fmt::make_args_checked<Args...>(format_str, args...));
+template <typename... Args>
+void print(std::wostream& os,
+ basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+ Args&&... args) {
+ vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
}
+
FMT_END_NAMESPACE
#endif // FMT_OSTREAM_H_
projects / lttng-tools.git / blobdiff