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I can see the light

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This commit is contained in:
iris
2025-05-02 18:18:13 -04:00
parent d7222cc7a4
commit 57c46b653e
35 changed files with 1247 additions and 1000 deletions
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src/parser/v3/lower/expr.rs
+65 -77
View File
@@ -1,60 +1,61 @@
use super::{func::FnLowerCtx, FnLowerable, PExpr, PostfixOp};
use crate::{
ir::{FieldRef, Type, UData, UInstruction, VarInst},
ir::{Type, UData, UInstruction, VarInst},
parser::InfixOp,
};
impl FnLowerable for PExpr {
type Output = VarInst;
fn lower(&self, ctx: &mut FnLowerCtx) -> Option<VarInst> {
Some(match self {
PExpr::Lit(l) => match l.as_ref()? {
let mut e = self;
let mut path = Vec::new();
while let PExpr::Member(node, ident) = e {
e = if let Some(t) = node.as_ref() {
path.push(ident);
&**t
} else {
return None;
};
}
Some(match e {
PExpr::Lit(l) => match l {
super::PLiteral::String(s) => {
let dest = ctx.program.temp_var(l.origin, Type::Bits(8).slice());
let dest = ctx.b.temp_var(ctx.origin, Type::Bits(8).slice());
let data = s.as_bytes().to_vec();
let src = ctx.program.def(
&format!("string \"{}\"", s.replace("\n", "\\n")),
Some(UData {
ty: Type::Bits(8).arr(data.len() as u32),
content: data,
}),
l.origin,
);
ctx.push(UInstruction::LoadSlice { dest, src });
let src = ctx.b.def_data(UData {
name: format!("string \"{}\"", s.replace("\n", "\\n")),
ty: Type::Bits(8).arr(data.len() as u32),
content: data,
});
ctx.push(UInstruction::LoadSlice { dst: dest, src });
dest
}
super::PLiteral::Char(c) => {
let ty = Type::Bits(8);
let dest = ctx.program.temp_var(l.origin, ty.clone());
let src = ctx.program.def(
&format!("char '{c}'"),
Some(UData {
ty,
content: c.to_string().as_bytes().to_vec(),
}),
l.origin,
);
ctx.push(UInstruction::LoadData { dest, src });
let dest = ctx.b.temp_var(ctx.origin, ty.clone());
let src = ctx.b.def_data(UData {
name: format!("char '{c}'"),
ty,
content: c.to_string().as_bytes().to_vec(),
});
ctx.push(UInstruction::LoadData { dst: dest, src });
dest
}
super::PLiteral::Number(n) => {
// TODO: temp
let ty = Type::Bits(64);
let dest = ctx.program.temp_var(l.origin, ty.clone());
let src = ctx.program.def(
&format!("num {n:?}"),
Some(UData {
ty,
content: n.whole.parse::<i64>().unwrap().to_le_bytes().to_vec(),
}),
l.origin,
);
ctx.push(UInstruction::LoadData { dest, src });
let dest = ctx.b.temp_var(ctx.origin, ty.clone());
let src = ctx.b.def_data(UData {
name: format!("num {n:?}"),
ty,
content: n.whole.parse::<i64>().unwrap().to_le_bytes().to_vec(),
});
ctx.push(UInstruction::LoadData { dst: dest, src });
dest
}
super::PLiteral::Unit => ctx.program.temp_var(l.origin, Type::Unit),
super::PLiteral::Unit => ctx.b.temp_var(ctx.origin, Type::Unit),
},
PExpr::Ident(i) => ctx.get_var(i)?,
PExpr::Ident(i) => ctx.get_var(i),
PExpr::BinaryOp(op, e1, e2) => match op {
InfixOp::Add => todo!(),
InfixOp::Sub => todo!(),
@@ -62,49 +63,30 @@ impl FnLowerable for PExpr {
InfixOp::Div => todo!(),
InfixOp::LessThan => todo!(),
InfixOp::GreaterThan => todo!(),
InfixOp::Member => {
let res1 = e1.lower(ctx)?;
let Some(box PExpr::Ident(ident)) = &e2.inner else {
ctx.err("Field accessors must be identifiers".to_string());
return None;
};
let fname = ident.as_ref()?.0.clone();
ctx.temp(Type::Field(FieldRef {
parent: res1.id,
name: fname,
}))
}
InfixOp::Assign => {
let res1 = e1.lower(ctx)?;
let res2 = e2.lower(ctx)?;
ctx.push(UInstruction::Mv {
dest: res1,
dst: res1,
src: res2,
});
res1
}
},
PExpr::PostfixOp(op, e) => {
PExpr::PostfixOp(e, op) => {
let res = e.lower(ctx)?;
match op {
PostfixOp::Ref => {
let temp = ctx.temp(ctx.program.expect(res.id).ty.clone().rf());
ctx.push(UInstruction::Ref {
dest: temp,
src: res,
});
temp
let ty = ctx.b.vars[res.id].ty.rf();
let dest = ctx.temp(ty);
ctx.push(UInstruction::Ref { dst: dest, src: res });
dest
}
PostfixOp::Deref => {
let t = &ctx.program.expect(res.id).ty;
let Type::Ref(_) = t else {
ctx.err(format!(
"Cannot dereference type {:?}",
ctx.program.type_name(t)
));
return None;
};
todo!();
let ty = ctx.b.vars[res.id].ty.derf();
let dest = ctx.temp(ty);
ctx.push(UInstruction::Deref { dst: dest, src: res });
dest
}
PostfixOp::Not => todo!(),
}
@@ -118,37 +100,36 @@ impl FnLowerable for PExpr {
let arg = arg.lower(ctx)?;
nargs.push(arg);
}
let ty = ctx
.program
.get_fn_var(fe.id)
.map(|f| f.ret.clone())
.unwrap_or(Type::Placeholder);
let temp = ctx.temp(ty);
let dest = ctx.temp(Type::Placeholder);
ctx.push(UInstruction::Call {
dest: temp,
dst: dest,
f: fe,
args: nargs,
});
temp
dest
}
PExpr::Group(e) => e.lower(ctx)?,
PExpr::Construct(c) => c.lower(ctx)?,
PExpr::Construct(e, map) => {
let dest = ctx.temp(Type::Placeholder);
ctx.push(UInstruction::Construct { dst: dest, fields: () });
dest
}
PExpr::If(cond, body) => {
let cond = cond.lower(ctx)?;
ctx.program.push();
ctx.b.push();
let mut body_ctx = ctx.branch();
body.lower(&mut body_ctx);
let body = body_ctx.instructions;
ctx.program.pop();
ctx.b.pop();
ctx.push(UInstruction::If { cond, body });
return None;
}
PExpr::Loop(body) => {
ctx.program.push();
ctx.b.push();
let mut body_ctx = ctx.branch();
body.lower(&mut body_ctx);
let body = body_ctx.instructions;
ctx.program.pop();
ctx.b.pop();
ctx.push(UInstruction::Loop { body });
return None;
}
@@ -160,6 +141,13 @@ impl FnLowerable for PExpr {
ctx.push(UInstruction::Continue);
return None;
}
PExpr::Member(e, name) => {
ctx.err("Can't access a member here".to_string());
return None;
}
PExpr::Field(e, name) => {
todo!()
}
})
}
}