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hm-inference #6

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sb10q merged 136 commits from hm-inference into master 2021-08-19 11:46:50 +08:00
Conversation 1 Commits 136 Files Changed 29 +11 -17
1 changed files with 11 additions and 17 deletions
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28
nac3core/src/typecheck/typedef/mod.rs
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@ -308,11 +308,8 @@ impl Unifier {
(TVar { meta: Record(map), id, range, .. }, TObj { fields, .. }) => {
self.occur_check(a, b)?;
for (k, v) in map.borrow().iter() {
if let Some(ty) = fields.get(k) {
self.unify(*ty, *v)?;
} else {
return Err(format!("No such attribute {}", k));
}
let ty = fields.get(k).ok_or_else(|| format!("No such attribute {}", k))?;
self.unify(*ty, *v)?;
}
let x = self.check_var_compatibility(*id, b, &range.borrow())?.unwrap_or(b);
self.unify(x, b)?;
@ -323,14 +320,11 @@ impl Unifier {
let ty = self.get_ty(*ty);
if let TObj { fields, .. } = ty.as_ref() {
for (k, v) in map.borrow().iter() {
if let Some(ty) = fields.get(k) {
if !matches!(self.get_ty(*ty).as_ref(), TFunc { .. }) {
return Err(format!("Cannot access field {} for virtual type", k));
}
self.unify(*v, *ty)?;
} else {
return Err(format!("No such attribute {}", k));
let ty = fields.get(k).ok_or_else(|| format!("No such attribute {}", k))?;
if !matches!(self.get_ty(*ty).as_ref(), TFunc { .. }) {
return Err(format!("Cannot access field {} for virtual type", k));
}
self.unify(*v, *ty)?;
}
} else {
// require annotation...
@ -400,11 +394,11 @@ impl Unifier {
if let Some(i) = required.iter().position(|v| v == k) {
required.remove(i);
}
if let Some(i) = all_names.iter().position(|v| &v.0 == k) {
self.unify(all_names.remove(i).1, *t)?;
} else {
return Err(format!("Unknown keyword argument {}", k));
}
let i = all_names
.iter()
.position(|v| &v.0 == k)
.ok_or_else(|| format!("Unknown keyword argument {}", k))?;
self.unify(all_names.remove(i).1, *t)?;
}
if !required.is_empty() {
return Err("Expected more arguments".to_string());