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chore: improve messages for unexpected arguments

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This commit is contained in:
Shunsuke Shibayama 2023-02-24 10:31:05 +09:00
parent 7c748f223a
commit 73a91dcbbb
4 changed files with 93 additions and 4 deletions
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28
crates/erg_compiler/context/unify.rs
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@ -775,7 +775,23 @@ impl Context {
// contravariant
self.sub_unify(rpt.typ(), lpt.typ(), loc, param_name)?;
} else {
unreachable!()
let param_name = lpt.name().map_or("_", |s| &s[..]);
let similar_param = erg_common::levenshtein::get_similar_name(
rsub.default_params
.iter()
.map(|pt| pt.name().map_or("_", |s| &s[..])),
param_name,
);
return Err(TyCheckErrors::from(
TyCheckError::default_param_not_found_error(
self.cfg.input.clone(),
line!() as usize,
loc.loc(),
self.caused_by(),
param_name,
similar_param,
),
));
}
}
// covariant
@ -876,7 +892,15 @@ impl Context {
if let Some((_, sub_ty)) = sub_fields.get_key_value(&sup_field) {
self.sub_unify(sub_ty, &sup_ty, loc, param_name)?;
} else {
unreachable!()
return Err(TyCheckErrors::from(TyCheckError::no_attr_error(
self.cfg.input.clone(),
line!() as usize,
loc.loc(),
self.caused_by(),
sub,
&sup_field.symbol,
self.get_similar_attr(sub, &sup_field.symbol),
)));
}
}
Ok(())