Function parse_long 

pub fn parse_long(s: &str) -> Result<i32, XmlError>

Long parser (signed 32-bit) per Spec §7.1.4 Tab.7.1.

Accepts:

• Decimal: -2147483648..=2147483647
• Hex (prefix 0x / 0X): 0..=0xFFFFFFFF (bit pattern, reinterpreted as i32).
• Symbol LENGTH_UNLIMITED -> -1.

Errors

XmlError::ValueOutOfRange on a value range violation or a parser error.