Constant lexical_write_float::format::CXX20_LITERAL

pub const CXX20_LITERAL: u128 = NumberFormatBuilder::new().digit_separator(num::NonZeroU8::new(b'\'')).case_sensitive_special(true).internal_digit_separator(true).build(); // 0x0000_0a00_0000_0027_0000_0007_0000_080cu128

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