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C++ Format v0.9.0 Release Notes

Release Date: 2014-05-13 // almost 10 years ago

    • More efficient implementation of variadic formatting functions.

    • Writer::Format now has a variadic overload:

    .. code:: c++

    Writer out;
out.Format("Look, I'm {}!", "variadic");
    • For efficiency and consistency with other overloads, variadic overload of the Format function now returns Writer instead of std::string. Use the str function to convert it to std::string:

    .. code:: c++

    std::string s = str(Format("Look, I'm {}!", "variadic"));

    • Replaced formatter actions with output sinks: NoAction -> NullSink, Write -> FileSink, ColorWriter -> ANSITerminalSink. This improves naming consistency and shouldn't affect client code unless these classes are used directly which should be rarely needed.

    • ➕ Added ThrowSystemError function that formats a message and throws SystemError containing the formatted message and system-specific error description. For example, the following code

    .. code:: c++

    FILE *f = fopen(filename, "r");
if (!f)
  ThrowSystemError(errno, "Failed to open file '{}'") << filename;

    will throw SystemError exception with description "Failed to open file '': No such file or directory" if file doesn't exist.

    • 👌 Support for AppVeyor continuous integration platform.

    • Format now throws SystemError in case of I/O errors.

    • 👌 Improve test infrastructure. Print functions are now tested by redirecting the output to a pipe.