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Implement import aliases

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Allows a module to be imported with an alias:

    import JsonDecode as JD

Import aliases must be unique and they cannot have the same name
as an imported module.
This commit is contained in:
Agus Zubiaga 2024-03-29 17:35:24 -03:00
parent d5a38a26db
commit 842a256907
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6 changed files with 443 additions and 61 deletions
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24
crates/compiler/can/src/def.rs
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@ -1094,6 +1094,7 @@ fn canonicalize_value_defs<'a>(
imports_introduced.push(introduced_import);
}
PendingValue::InvalidIngestedFile => { /* skip */ }
PendingValue::ImportAliasConflict => { /* skip */ }
}
}
@ -2832,6 +2833,7 @@ enum PendingValue<'a> {
ModuleImport(IntroducedImport),
SignatureDefMismatch,
InvalidIngestedFile,
ImportAliasConflict,
}
struct PendingExpectOrDbg<'a> {
@ -2975,7 +2977,27 @@ fn to_pending_value_def<'a>(
.get_id(&module_name)
.expect("Module id should have been added in load");
scope.import_module(module_id);
match module_import.alias {
Some(alias) => {
let alias_str = alias.item.value.as_str();
if let Err(conflict) = scope.import_module_with_alias(
env.module_ids,
module_id,
alias_str,
alias.item.region,
) {
env.problems.push(Problem::ImportAliasConflict {
alias: alias_str.to_owned(),
conflict,
module_id,
region: alias.item.region,
});
return PendingValue::ImportAliasConflict;
}
}
None => scope.import_module(module_id, module_import.name.region),
}
let mut exposed_symbols;