Constant lexical_parse_float::format::CXX20_HEX_LITERAL

pub const CXX20_HEX_LITERAL: u128 = NumberFormatBuilder::new().required_exponent_notation(true).digit_separator(num::NonZeroU8::new(b'\'')).mantissa_radix(16).exponent_base(num::NonZeroU8::new(2)).exponent_radix(num::NonZeroU8::new(10)).case_sensitive_special(true).internal_digit_separator(true).build(); // 13_302_989_070_119_887_530_444_933_656_219_764_748u128

Number format for a C++20 literal hexadecimal floating-point number.