carbon-lang/toolchain/check/testdata/impl/orphan.carbon

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/orphan.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/orphan.carbon

// --- imports.carbon
library "[[@TEST_NAME]]";

class ImportedC {}
class ImportedD(T: type) {}

interface ImportedY {}
interface ImportedZ(T: type) {}

constraint ImportedN(T: type) {}

class ImportedAnyParam[T: type](X: T) {}

// --- class_definition_missing.carbon
library "[[@TEST_NAME]]";

import library "imports";

// This is the first owning decl of C, so it can be an anchor name.
class C;

impl C as ImportedY {}

// --- class_definition_missing_for_self_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

// This is the first owning decl of C, so it can be an anchor name.
class C;

impl ImportedD(C) as ImportedY {}

// --- class_definition_missing_for_interface_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

// This is the first owning decl of C, so it can be an anchor name.
class C;

impl ImportedC as ImportedZ(C) {}

// --- fail_imported_class.carbon
library "[[@TEST_NAME]]";

import library "imports";

// CHECK:STDERR: fail_imported_class.carbon:[[@LINE+4]]:1: error: orphan `impl` found; something in the self-type or constraint must be defined in the same file [ImplIsOrphan]
// CHECK:STDERR: impl ImportedC as ImportedY {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl ImportedC as ImportedY {}

// --- fail_imported_class_for_self_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

// CHECK:STDERR: fail_imported_class_for_self_specific.carbon:[[@LINE+4]]:1: error: orphan `impl` found; something in the self-type or constraint must be defined in the same file [ImplIsOrphan]
// CHECK:STDERR: impl ImportedD(ImportedC) as ImportedY {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl ImportedD(ImportedC) as ImportedY {}

// --- fail_imported_class_for_interface_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

// CHECK:STDERR: fail_imported_class_for_interface_specific.carbon:[[@LINE+4]]:1: error: orphan `impl` found; something in the self-type or constraint must be defined in the same file [ImplIsOrphan]
// CHECK:STDERR: impl ImportedC as ImportedZ(ImportedC) {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl ImportedC as ImportedZ(ImportedC) {}

// --- class_definition_after.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C;

impl C as ImportedY {}

class C {}

// --- class_definition_after_for_self_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C;

impl ImportedD(C) as ImportedY {}

class C {}

// --- class_definition_after_for_interface_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C;

impl ImportedC as ImportedZ(C) {}

class C {}

// --- class_definition_before.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C {}

impl C as ImportedY {}

// --- class_definition_before_for_self_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C {}

impl ImportedD(C) as ImportedY {}

// --- class_definition_before_for_interface_specific.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C {}

impl ImportedC as ImportedZ(C) {}

// --- fail_generic_class_from_import.carbon
library "[[@TEST_NAME]]";

import library "imports";

// CHECK:STDERR: fail_generic_class_from_import.carbon:[[@LINE+4]]:1: error: orphan `impl` found; something in the self-type or constraint must be defined in the same file [ImplIsOrphan]
// CHECK:STDERR: impl ImportedAnyParam(ImportedD) as ImportedY {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl ImportedAnyParam(ImportedD) as ImportedY {}

// --- generic_class.carbon
library "[[@TEST_NAME]]";

import library "imports";

class D(T: type) {}

impl ImportedAnyParam(D) as ImportedY {}

// --- fail_generic_interface_from_import.carbon
library "[[@TEST_NAME]]";

import library "imports";

// CHECK:STDERR: fail_generic_interface_from_import.carbon:[[@LINE+4]]:1: error: orphan `impl` found; something in the self-type or constraint must be defined in the same file [ImplIsOrphan]
// CHECK:STDERR: impl ImportedAnyParam(ImportedZ) as ImportedY {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl ImportedAnyParam(ImportedZ) as ImportedY {}

// --- generic_interface.carbon
library "[[@TEST_NAME]]";

import library "imports";

interface Z(T: type) {}

impl ImportedAnyParam(Z) as ImportedY {}

// --- fail_generic_named_constraint_from_import.carbon
library "[[@TEST_NAME]]";

import library "imports";

// CHECK:STDERR: fail_generic_named_constraint_from_import.carbon:[[@LINE+4]]:1: error: orphan `impl` found; something in the self-type or constraint must be defined in the same file [ImplIsOrphan]
// CHECK:STDERR: impl ImportedAnyParam(ImportedN) as ImportedY {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
impl ImportedAnyParam(ImportedN) as ImportedY {}

// --- generic_named_constraint.carbon
library "[[@TEST_NAME]]";

import library "imports";

constraint N(T: type) {}

impl ImportedAnyParam(N) as ImportedY {}

// --- todo_fail_orphan_in_class_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

// Neither {} nor Z are defined within or by the scope of `C`.
class C {
  impl {} as Z {}
}

// --- valid_in_fn_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

fn F() {
  class C {}
  impl C as Z {}
}

// --- todo_fail_orphan_in_fn_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

// Neither {} nor Z are defined within or by the scope of `F`.
fn F() {
  impl {} as Z {}
}

// --- valid_in_generic_fn_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

fn F(unused generic T: type) {
  class C {}
  impl C as Z {}
}

// --- fail_todo_orphan_in_generic_fn_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

// Neither {} nor Z are defined within or by the scope of `F`.
fn F(unused generic T: type) {
  // TODO: The error should be about being an orphan, not an unused binding.
  // CHECK:STDERR: fail_todo_orphan_in_generic_fn_scope.carbon:[[@LINE+4]]:3: error: `impl` with unused generic binding [ImplUnusedBinding]
  // CHECK:STDERR:   impl {} as Z {}
  // CHECK:STDERR:   ^~~~~~~~~~~~~~
  // CHECK:STDERR:
  impl {} as Z {}
}

// --- valid_in_block_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

fn F() {
  if (true) {
    class C {}
    impl C as Z {}
  }
}

// --- todo_fail_orphan_in_block_scope.carbon
library "[[@TEST_NAME]]";

interface Z {}

fn F() {
  class C {}
  // Neither C nor Z are defined within or by this if block scope.
  if (true) {
    impl C as Z {}
  }
}

// --- name_defined_by_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C {
  impl as ImportedY {}
};

// --- name_defined_in_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

fn F() {
  class C {}
  impl C as ImportedY {}
};

// --- name_defined_after_in_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

fn F() {
  class C;
  impl C as ImportedY {}
  class C {}
};

// --- name_defined_in_nested_namespace_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

namespace N;
class N.C {}

impl N.C as ImportedY {}

// --- name_defined_after_in_nested_namespace_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

namespace N;
class N.C;

impl N.C as ImportedY {}

class N.C {}

// --- name_defined_in_nested_class_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C {
  class D {}
}
impl C.D as ImportedY {}

// --- name_defined_after_in_nested_class_scope.carbon
library "[[@TEST_NAME]]";

import library "imports";

class C {
  class D;
}
impl C.D as ImportedY {}

class C.D {}

// --- fail_todo_extern_class.carbon
library "[[@TEST_NAME]]";

import library "use_extern_class";

// CHECK:STDERR: fail_todo_extern_class.carbon:[[@LINE+4]]:1: error: redeclaration of `class C` is redundant [RedeclRedundant]
// CHECK:STDERR: extern class C;
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR: fail_todo_extern_class.carbon:[[@LINE-5]]:1: in import [InImport]
extern class C;

// --- fail_use_extern_class.carbon
library "[[@TEST_NAME]]";

import library "imports";

// A non-owning decl of C.
// CHECK:STDERR: fail_use_extern_class.carbon:[[@LINE+8]]:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: extern library "extern_class" class C;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_use_extern_class.carbon:[[@LINE+4]]:1: error: semantics TODO: `extern library` [SemanticsTodo]
// CHECK:STDERR: extern library "extern_class" class C;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
extern library "extern_class" class C;

// TODO: This should be an orphan `impl`. `C` is owned by `extern_class`, so it
// can't be an anchor name. No error will be emitted until `extern library` is
// implemented for classes.
impl C as ImportedY {}

// --- imported_first_owning_decl.carbon
library "[[@TEST_NAME]]";

class ImportedClassDecl;

interface ImportedInterface {}

// --- todo_fail_imported_first_owning_decl.impl.carbon
impl library "[[@TEST_NAME]]";

// This is an owning decl, but not the first owning decl, which is in the api
// file. So it can not be an anchor name.
class ImportedClassDecl {}

// TODO: This should fail, there is no anchor name.
impl ImportedClassDecl as ImportedInterface {}