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If a name is not found in a class, perform lookup into base classes. (#3502)

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This builds out a little infrastructure for one name scope to `extend`
another. We'll need more refinement here to cover other cases, but this
should provide some foundation for that future work.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
This commit is contained in:
Richard Smith
2023-12-14 19:51:55 +00:00
committed by GitHub
co-authored by Jon Ross-Perkins
parent 23c7d7dd99
commit de0c02ddae
28 changed files with 892 additions and 132 deletions
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toolchain/check/check.cpp
+3 -3
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@@ -87,7 +87,7 @@ static auto InitPackageScopeAndImports(Context& context, UnitInfo& unit_info)
if (self_import != unit_info.package_imports_map.end()) {
auto& package_scope =
context.name_scopes().Get(SemIR::NameScopeId::Package);
package_scope.has_load_error = self_import->second.has_load_error;
package_scope.has_error = self_import->second.has_load_error;
for (const auto& import : self_import->second.imports) {
const auto& import_sem_ir = **import.unit_info->unit->sem_ir;
@@ -96,7 +96,7 @@ static auto InitPackageScopeAndImports(Context& context, UnitInfo& unit_info)
// If an import of the current package caused an error for the imported
// file, it transitively affects the current file too.
package_scope.has_load_error |= import_scope.has_load_error;
package_scope.has_error |= import_scope.has_error;
auto ir_id = context.sem_ir().cross_ref_irs().Add(&import_sem_ir);
@@ -124,7 +124,7 @@ static auto InitPackageScopeAndImports(Context& context, UnitInfo& unit_info)
// Push the scope.
context.PushScope(package_inst, SemIR::NameScopeId::Package,
package_scope.has_load_error);
package_scope.has_error);
} else {
// Push the scope; there are no names to add.
context.PushScope(package_inst, SemIR::NameScopeId::Package);