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reimplement Result

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Folkert 2022-02-23 17:52:13 +01:00
parent 410426f059
commit d1d7cfef44
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7 changed files with 155 additions and 6 deletions
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47
compiler/constrain/src/module.rs
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@ -160,6 +160,53 @@ pub fn pre_constrain_imports(
});
}
None => {
if module_id == home {
continue;
}
if module_id == ModuleId::RESULT {
let region = Region::zero(); // TODO this should be the region where this symbol was declared in its home module. Look that up!
let loc_symbol = Loc {
value: symbol,
region,
};
match exposed_types.get(&module_id) {
Some(ExposedModuleTypes::Valid(solved_types, new_aliases)) => {
// If the exposed value was invalid (e.g. it didn't have
// a corresponding definition), it won't have an entry
// in solved_types
if let Some(solved_type) = solved_types.get(&symbol) {
// TODO should this be a union?
for (k, v) in new_aliases.clone() {
imported_aliases.insert(k, v);
}
imported_symbols.push(Import {
loc_symbol,
solved_type: solved_type.clone(),
});
}
}
Some(ExposedModuleTypes::Invalid) => {
// If that module was invalid, use True constraints
// for everything imported from it.
imported_symbols.push(Import {
loc_symbol,
solved_type: SolvedType::Erroneous(Problem::InvalidModule),
});
}
None => {
panic!(
"Could not find module {:?} in exposed_types {:?}",
module_id, exposed_types
);
}
}
continue;
}
let is_valid_alias = stdlib.applies.contains(&symbol)
// This wasn't a builtin value or Apply; maybe it was a builtin alias.
|| roc_types::builtin_aliases::aliases().contains_key(&symbol);