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fix(compiler): handle Any in head and tail #147

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Merged
rahulk29 merged 1 commit into from
Mar 5, 2026
Merged

fix(compiler): handle Any in head and tail #147

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58 changes: 33 additions & 25 deletions core/compiler/src/compile.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1639,38 +1639,46 @@ impl<'a> AstTransformer for VarIdTyPass<'a> {
self.assert_eq_arity(input.span, args.posargs.len(), 1);
if args.posargs.len() == 1 {
let argty = args.posargs[0].ty();
if let Ty::Seq(i) = argty {
(None, *i)
} else {
self.errors.push(StaticError {
span: self.span(input.span),
kind: StaticErrorKind::IncorrectTyCategory {
found: argty,
expected: "Seq".to_string(),
},
});
(None, Ty::Nil)
}
let vty = match argty {
Ty::Seq(i) => *i,
Ty::Any => Ty::Any,
Ty::Unknown => Ty::Unknown,
_ => {
self.errors.push(StaticError {
span: self.span(input.span),
kind: StaticErrorKind::IncorrectTyCategory {
found: argty,
expected: "Seq".to_string(),
},
});
Ty::Unknown
}
};
(None, vty)
} else {
(None, Ty::Nil)
(None, Ty::Unknown)
}
}
"tail" => {
self.assert_eq_arity(input.span, args.posargs.len(), 1);
if args.posargs.len() == 1 {
let argty = args.posargs[0].ty();
if let Ty::Seq(_) = argty {
(None, argty)
} else {
self.errors.push(StaticError {
span: self.span(input.span),
kind: StaticErrorKind::IncorrectTyCategory {
found: argty,
expected: "Seq".to_string(),
},
});
(None, Ty::Nil)
}
let vty = match argty {
Ty::Seq(_) => argty,
Ty::Any => Ty::Any,
Ty::Unknown => Ty::Unknown,
_ => {
self.errors.push(StaticError {
span: self.span(input.span),
kind: StaticErrorKind::IncorrectTyCategory {
found: argty,
expected: "Seq".to_string(),
},
});
Ty::Unknown
}
};
(None, vty)
} else {
(None, Ty::Nil)
}
Expand Down
16 changes: 14 additions & 2 deletions examples/seq_any/lib.ar
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Original file line number Diff line number Diff line change
Expand Up @@ -2,9 +2,21 @@ fn prepend(lst: [Any]) -> [Float] {
cons(100., lst)
}

fn prependany(lst: Any) -> Any {
cons(1400., lst)
}

fn headany(lst: Any) -> Any {
head(lst)
}

fn tailany(lst: Any) -> Any {
tail(lst)
}

cell top() {
let r = rect("met1", x0=0., y0=0., x1=400.)!;
let lst = prepend(cons(500., cons(300., cons(800., cons(200., cons(1400., []))))));
let v = head(tail(tail(tail(tail(lst)))));
let lst = prepend(prependany(cons(500., cons(300., cons(800., cons(200., cons(1400., [])))))));
let v = headany(tail(tailany(tail(tailany(tail(lst))))));
eq(r.y1, v);
}