Constant lexical_parse_integer::format::REQUIRED_EXPONENT_NOTATION

pub const REQUIRED_EXPONENT_NOTATION: u128 = 1 << 14; // 0x0000_0000_0000_0000_0000_0000_0000_4000u128

Exponent notation is required.

Valid floats must contain an exponent notation character, and if applicable, a sign character and digits afterwards.