fmt

a fast and safe alternative to C stdio and C++ iostreams.

format

std::string str = fmt::format("");

aligent

< & >

regex-style

Color & Text Style

fmt/color.h provides support for terminal color and text style output.

#include <fmt/color.h>

fmt::print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) | fmt::emphasis::underline, 
            "Hello, {}!\n", "World");

Color

fgforeground, 前景色, 即字体颜色； bgbackground，背景色，顾名思义，背景色。

使用方法是fg(fmt::color::xxx)或bg(fmt::color::xxx)

fmt中预设了一百多种颜色, 详见fmt/color.h

Text Style

fmt::emphasis::xxx

fmt中预设了8中字体风格，常用的有emphasis::bold，emphasis::italic，emphasis::underline，emphasis::strikethrough等

chrono

#include <fmt/chrono.h>

int main() {
  using namespace std::literals::chrono_literals;
  fmt::print("Default format: {} {}\n", 42s, 100ms);
  fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
}