#[derive(Clone,Copy)]
pub struct CharAddress {
    /// The number of lines that precede this line in the file.
    pub line:usize,
    /// The number of characters that precede this character in the line.
    pub column:usize,
}
impl CharAddress {
    pub fn new(line:usize, column:usize) -> Self {
        Self { line, column }
    }
    pub fn zero() -> Self {
        Self::new(0,0)
    }
}

pub struct SourceLocation {
    /// The slice of the source file from which this token was parsed.
    pub source: String,
    /// The address of the first character of this token.
    pub start: CharAddress,
    /// The address of the final character of this token.
    pub end: CharAddress
}
impl SourceLocation {
    pub fn new(source:String, start:CharAddress, end:CharAddress) -> Self {
        Self { source, start, end }
    }
    pub fn zero() -> Self {
        Self { source:String::new(), start:CharAddress::zero(), end:CharAddress::zero() }
    }
}

pub struct BytecodeLocation {
    /// The number of bytes that precede this byte sequence in the bytecode.
    pub start: u16,
    /// The length of this byte sequence, in bytes.
    pub length: u16,
}
impl BytecodeLocation {
    pub fn zero() -> Self {
        Self { start:0, length:0 }
    }
}