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C++17 in Detail: A Deep Dive

to_chars

Explore the to_chars function in C++17 for efficient string conversions of integers and floating point numbers. Understand how to specify output formats, manage precision, and interpret the conversion results including error handling.

We'll cover the following...

to_chars is a set of overloaded functions for integral and floating point types.

Integral types declaration

C++
std::to_chars_result to_chars(char* first, char* last, TYPE value, int base = 10);

Where TYPE expands to all available signed and unsigned integer types and char.

Since base might range from 2 to 36, the output digits that are greater than 9 are represented as lowercase letters: a...z.

Floating point types declaration

Basic function

C++
std::to_chars_result to_chars(char* first, char* last, FLOAT_TYPE value);

FLOAT_TYPE expands to float ...