use std::ops::Range;
use crate::{
executor::Instruction,
memory::{LAddress, LVar},
};
pub struct DebugInfo<'s> {
pub variables: Box<[VarInfo<'s>]>,
/// maps "start" to 0
pub labels: Vec<(&'s str, Instruction)>,
}
impl<'s> Default for DebugInfo<'s> {
fn default() -> Self {
Self {
variables: vec![].into(),
labels: vec![],
}
}
}
impl<'s> DebugInfo<'s> {
pub fn label(&self, of: Instruction) -> Option<&'s str> {
self.labels.iter().find(|(_, i)| *i == of).map(|&(x, _)| x)
}
}
impl<'s> std::ops::Index<LAddress> for DebugInfo<'s> {
type Output = VarData<'s>;
fn index(&self, index: LAddress) -> &Self::Output {
&self.variables[index.address as usize].data
}
}
#[derive(Clone, Debug)]
pub struct VarInfo<'s> {
pub data: VarData<'s>,
#[allow(dead_code)]
pub span: Range<usize>,
}
#[derive(Clone, Debug)]
pub enum VarData<'s> {
Variable(&'s str),
// not necessary, but convenient.
Constant(LVar<'s>),
}
impl std::fmt::Display for VarData<'_> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
VarData::Variable(name) => f.write_str(name),
VarData::Constant(c) => write!(f, "{c}"),
}
}
}