C++20 – std::format

std::format is a new function Introduced in C++20 that provides a way to format strings by replacing placeholders inside a format string with the values of the provided arguments. The placeholders are represented using “{}” inside the format string.

Syntax:

std::string std::format(std::string_view format_string, Args... args);

Return type: The function returns a std::string that contains the formatted output.

In C++20, a new data type named “std::string_view” is introduced, which provides a view of the underlying string. It works similarly to a pointer to a string but with additional safety and convenience features. The “Args…” represents a variadic parameter, which means that the std::format function can take a variable number of arguments of any type.

C++20 comes with a host of new features and improvements, including the format() function. In this article, we will explore how std::format can be used to format strings in C++20.