// 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/interop/cpp/function/struct.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function/struct.carbon

// ============================================================================
// Forward-declared struct as parameter type
// ============================================================================

// --- decl_value_param_type.h

struct S;

auto foo(S) -> void;

// --- fail_todo_import_decl_value_param_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "decl_value_param_type.h";

fn F() {
  //@dump-sem-ir-begin
  // TODO: This should fail on the fact `S` is declared and not defined.
  // CHECK:STDERR: fail_todo_import_decl_value_param_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: struct S` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_decl_value_param_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo({});
  //@dump-sem-ir-end
}

// ============================================================================
// Defined struct without data members as parameter type
// ============================================================================

// --- definition_no_data_members_value_param_type.h

struct S {};

auto foo(S) -> void;

// --- fail_todo_import_definition_no_data_members_value_param_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "definition_no_data_members_value_param_type.h";

fn F() {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_definition_no_data_members_value_param_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: struct S` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_definition_no_data_members_value_param_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo({});
  //@dump-sem-ir-end
}

// ============================================================================
// Defined struct with a single data member as parameter type
// ============================================================================

// --- definition_single_data_member_value_param_type.h

struct D {};

struct S {
  D d;
};

auto foo(S) -> void;

// --- fail_todo_import_definition_single_data_member_value_param_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "definition_single_data_member_value_param_type.h";

fn F() {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_definition_single_data_member_value_param_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: struct S` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_definition_single_data_member_value_param_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo({});
  //@dump-sem-ir-end
}

// ============================================================================
// Defined struct with multiple data members as parameter type
// ============================================================================

// --- definition_multiple_data_members_value_param_type.h

struct D {};

struct S {
  D d1;
  D d2;
  D d3;
};

auto foo(S) -> void;

// --- fail_todo_import_definition_multiple_data_members_value_param_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "definition_multiple_data_members_value_param_type.h";

fn F() {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_definition_multiple_data_members_value_param_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: struct S` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_definition_multiple_data_members_value_param_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo({});
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo({});
  //@dump-sem-ir-end
}

// ============================================================================
// Pointer to forward-declared struct as parameter type
// ============================================================================

// --- decl_pointer_param_type.h

struct S;

auto foo(S*) -> void;

// --- fail_todo_import_decl_pointer_param_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "decl_pointer_param_type.h";

// CHECK:STDERR: fail_todo_import_decl_pointer_param_type.carbon:[[@LINE+7]]:9: error: semantics TODO: `Unsupported: Record declarations without a definition` [SemanticsTodo]
// CHECK:STDERR: fn F(s: Cpp.S*) {
// CHECK:STDERR:         ^~~~~
// CHECK:STDERR: fail_todo_import_decl_pointer_param_type.carbon:[[@LINE+4]]:9: note: in `Cpp` name lookup for `S` [InCppNameLookup]
// CHECK:STDERR: fn F(s: Cpp.S*) {
// CHECK:STDERR:         ^~~~~
// CHECK:STDERR:
fn F(s: Cpp.S*) {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_decl_pointer_param_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: struct S *` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo(s);
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_decl_pointer_param_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo(s);
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo(s);
  //@dump-sem-ir-end
}

// ============================================================================
// Pointer to defined struct as parameter type
// ============================================================================

// --- definition_pointer_param_type.h

struct S {};

auto foo(S*) -> void;

// --- fail_todo_import_definition_pointer_param_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "definition_pointer_param_type.h";

fn F(s: Cpp.S*) {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_definition_pointer_param_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: struct S *` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo(s);
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_definition_pointer_param_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo(s);
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo(s);
  //@dump-sem-ir-end
}

// ============================================================================
// Forward-declared struct as return type
// ============================================================================

// --- decl_value_return_type.h

struct S;

auto foo() -> S;

// --- fail_todo_import_decl_value_return_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "decl_value_return_type.h";

fn F() {
  //@dump-sem-ir-begin
  // TODO: This should fail on the fact `S` is declared and not defined.
  // CHECK:STDERR: fail_todo_import_decl_value_return_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: return type: struct S` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_decl_value_return_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo();
  //@dump-sem-ir-end
}

// ============================================================================
// Defined struct as return type
// ============================================================================

// --- definition_value_return_type.h

struct S {};

auto foo() -> S;

// --- fail_todo_import_definition_value_return_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "definition_value_return_type.h";

fn F() {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_definition_value_return_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: return type: struct S` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_definition_value_return_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo();
  //@dump-sem-ir-end
}

// ============================================================================
// Pointer to forward-declared struct as return type
// ============================================================================

// --- decl_pointer_return_type.h

struct S;

auto foo() -> S*;

// --- fail_todo_import_decl_pointer_return_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "decl_pointer_return_type.h";

fn F() {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_decl_pointer_return_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: return type: struct S *` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_decl_pointer_return_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo();
  //@dump-sem-ir-end
}

// ============================================================================
// Pointer to defined struct as return type
// ============================================================================

// --- definition_pointer_return_type.h

struct S {};

auto foo() -> S*;

// --- fail_todo_import_definition_pointer_return_type.carbon

library "[[@TEST_NAME]]";

import Cpp library "definition_pointer_return_type.h";

fn F() {
  //@dump-sem-ir-begin
  // CHECK:STDERR: fail_todo_import_definition_pointer_return_type.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: return type: struct S *` [SemanticsTodo]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR: fail_todo_import_definition_pointer_return_type.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
  // CHECK:STDERR:   Cpp.foo();
  // CHECK:STDERR:   ^~~~~~~
  // CHECK:STDERR:
  Cpp.foo();
  //@dump-sem-ir-end
}

// CHECK:STDOUT: --- fail_todo_import_decl_value_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   %.loc16: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_definition_no_data_members_value_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   %.loc15: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_definition_single_data_member_value_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   %.loc15: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_definition_multiple_data_members_value_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   %.loc15: %empty_struct_type = struct_literal ()
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_decl_pointer_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .S = <error>
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%s.param: <error>) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref.loc22: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   %s.ref: <error> = name_ref s, %s [concrete = <error>]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_definition_pointer_param_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %S: type = class_type @S [concrete]
// CHECK:STDOUT:   %ptr: type = ptr_type %S [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .S = %S.decl
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %S.decl: type = class_decl @S [concrete = constants.%S] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%s.param: %ptr) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref.loc15: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   %s.ref: %ptr = name_ref s, %s
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_decl_value_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_definition_value_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_decl_pointer_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_import_definition_pointer_return_type.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .foo = <error>
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
// CHECK:STDOUT:   <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: