xrcf 0.1.0

A compiler framework to enable the rapid development of programming language compilers
Documentation 
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use std::fmt::Display;
use std::fmt::Formatter;
use std::fmt::Result;

trait Type {}

/// Represents an integer type such as i32 or i64.
/// This does not include the sign bit like in LLVM since
/// it doesn't matter for 2s complement integer arithmetic.
#[derive(Debug, Clone, Copy)]
pub struct IntegerType {
    num_bits: u64,
}

impl IntegerType {
    pub fn new(num_bits: u64) -> Self {
        Self { num_bits }
    }
    pub fn from_str(s: &str) -> Self {
        let s = s.strip_prefix("i").unwrap();
        let num_bits = s.parse::<u64>().unwrap();
        Self { num_bits }
    }
}

impl Type for IntegerType {}

impl Display for IntegerType {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
        write!(f, "i{}", self.num_bits)
    }
}

/// Arbitrary precision integer.
pub struct APInt {
    num_bits: u64,
    value: u64,
    is_signed: bool,
}

impl APInt {
    pub fn new(num_bits: u64, value: u64, is_signed: bool) -> Self {
        Self {
            num_bits,
            value,
            is_signed,
        }
    }
    pub fn from_str(typ: &str, value: &str) -> Self {
        let typ = IntegerType::from_str(typ);
        let value = value.parse::<u64>().unwrap();
        Self::new(typ.num_bits, value, true)
    }
    pub fn value(&self) -> u64 {
        self.value
    }
    pub fn is_signed(&self) -> bool {
        self.is_signed
    }
}

impl Display for APInt {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
        write!(f, "{}", self.value)
    }
}