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core/type_inferencer: Include location info if inferencer fails

This commit is contained in:
David Mak 2024-04-05 13:22:35 +08:00
parent a920fe0501
commit 876ad6c59c
1 changed files with 9 additions and 2 deletions
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11
nac3core/src/typecheck/type_inferencer/mod.rs
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@ -4,7 +4,7 @@ use std::iter::once;
use std::{cell::RefCell, sync::Arc};
use super::typedef::{Call, FunSignature, FuncArg, RecordField, Type, TypeEnum, Unifier, VarMap};
use super::{magic_methods::*, typedef::CallId};
use super::{magic_methods::*, type_error::TypeError, typedef::CallId};
use crate::{
symbol_resolver::{SymbolResolver, SymbolValue},
toplevel::{
@ -628,7 +628,14 @@ impl<'a> Inferencer<'a> {
loc: Some(location),
};
if let Some(ret) = ret {
self.unifier.unify(sign.ret, ret).unwrap();
self.unifier.unify(sign.ret, ret)
.map_err(|err| {
format!("Cannot unify {} <: {} - {:?}",
self.unifier.stringify(sign.ret),
self.unifier.stringify(ret),
TypeError::new(err.kind, Some(location)))
})
.unwrap();
}
let required: Vec<_> = sign
.args