Files
carbon-lang/toolchain/check/testdata/interop/cpp/cpp_diagnostics.carbon
T
Richard SmithandDavid Blaikie d5ec82e7ac Don't crash if clang setup fails. (#6804)
Defer creating the CppContext until we have all of its components, so
that we know they're not null. Don't track the action on the context,
since it's not a reliable way of getting back to the compiler invocation
on failure. Don't flush the diagnostics emitter from the emitter
destructor since the derived class emitter will already have been
destroyed at that point. Distinguish between clang setup failing and
clang merely producing errors, and don't connect the check context to
clang if clang setup failed.

---------

Co-authored-by: David Blaikie <dblaikie@gmail.com>
2026-02-27 02:44:08 +00:00

479 lines
19 KiB
Plaintext

// 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/cpp_diagnostics.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/cpp_diagnostics.carbon
// ============================================================================
// One error
// ============================================================================
// --- one_error.h
#error "error1"
// --- fail_import_cpp_file_with_one_error.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_cpp_file_with_one_error.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_error.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "one_error.h";
// ============================================================================
// Multiple errors
// ============================================================================
// --- multiple_errors.h
#error "error1"
#error "error2"
// --- fail_import_cpp_file_with_multiple_errors.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors.h:3:2: error: "error2" [CppInteropParseError]
// CHECK:STDERR: 3 | #error "error2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "multiple_errors.h";
// ============================================================================
// One warning
// ============================================================================
// --- one_warning.h
#warning "warning1"
// --- import_cpp_file_with_one_warning.carbon
library "[[@TEST_NAME]]";
//@dump-sem-ir-begin
// CHECK:STDERR: import_cpp_file_with_one_warning.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_warning.h:2:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 2 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "one_warning.h";
//@dump-sem-ir-end
// ============================================================================
// Multiple warnings
// ============================================================================
// --- multiple_warnings.h
#warning "warning1"
#warning "warning2"
#warning "warning3"
// --- import_cpp_file_with_multiple_warnings.carbon
library "[[@TEST_NAME]]";
//@dump-sem-ir-begin
// CHECK:STDERR: import_cpp_file_with_multiple_warnings.carbon:[[@LINE+15]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_warnings.h:2:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 2 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: import_cpp_file_with_multiple_warnings.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_warnings.h:3:2: warning: "warning2" [CppInteropParseWarning]
// CHECK:STDERR: 3 | #warning "warning2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: import_cpp_file_with_multiple_warnings.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_warnings.h:4:2: warning: "warning3" [CppInteropParseWarning]
// CHECK:STDERR: 4 | #warning "warning3"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "multiple_warnings.h";
//@dump-sem-ir-end
// ============================================================================
// One error and one warning
// ============================================================================
// --- one_error_and_one_warning.h
#error "error1"
#warning "warning1"
// --- fail_import_cpp_file_with_one_error_and_one_warning.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_cpp_file_with_one_error_and_one_warning.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_error_and_one_warning.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_file_with_one_error_and_one_warning.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_error_and_one_warning.h:3:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 3 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "one_error_and_one_warning.h";
// ============================================================================
// Multiple errors and multiple warnings
// ============================================================================
// --- multiple_errors_and_multiple_warnings.h
#error "error1"
#error "error2"
#warning "warning1"
#warning "warning2"
#warning "warning3"
// --- fail_import_cpp_file_with_multiple_errors_and_multiple_warnings.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors_and_multiple_warnings.carbon:[[@LINE+25]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors_and_multiple_warnings.carbon:[[@LINE+20]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:3:2: error: "error2" [CppInteropParseError]
// CHECK:STDERR: 3 | #error "error2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors_and_multiple_warnings.carbon:[[@LINE+15]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:4:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 4 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors_and_multiple_warnings.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:5:2: warning: "warning2" [CppInteropParseWarning]
// CHECK:STDERR: 5 | #warning "warning2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_file_with_multiple_errors_and_multiple_warnings.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:6:2: warning: "warning3" [CppInteropParseWarning]
// CHECK:STDERR: 6 | #warning "warning3"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "multiple_errors_and_multiple_warnings.h";
// ============================================================================
// Multiple files with warnings
// ============================================================================
// --- import_multiple_cpp_files_with_warnings.carbon
library "[[@TEST_NAME]]";
//@dump-sem-ir-begin
// CHECK:STDERR: import_multiple_cpp_files_with_warnings.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_warning.h:2:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 2 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "one_warning.h";
// CHECK:STDERR: import_multiple_cpp_files_with_warnings.carbon:[[@LINE+15]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_warnings.h:2:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 2 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: import_multiple_cpp_files_with_warnings.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_warnings.h:3:2: warning: "warning2" [CppInteropParseWarning]
// CHECK:STDERR: 3 | #warning "warning2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: import_multiple_cpp_files_with_warnings.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_warnings.h:4:2: warning: "warning3" [CppInteropParseWarning]
// CHECK:STDERR: 4 | #warning "warning3"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "multiple_warnings.h";
//@dump-sem-ir-end
// ============================================================================
// Multiple files with errors and warnings
// ============================================================================
// --- fail_import_multiple_cpp_files_with_errors_and_warnings.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_error_and_one_warning.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_error_and_one_warning.h:3:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 3 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "one_error_and_one_warning.h";
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+25]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+20]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:3:2: error: "error2" [CppInteropParseError]
// CHECK:STDERR: 3 | #error "error2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+15]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:4:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 4 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+10]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:5:2: warning: "warning2" [CppInteropParseWarning]
// CHECK:STDERR: 5 | #warning "warning2"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_multiple_cpp_files_with_errors_and_warnings.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./multiple_errors_and_multiple_warnings.h:6:2: warning: "warning3" [CppInteropParseWarning]
// CHECK:STDERR: 6 | #warning "warning3"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "multiple_errors_and_multiple_warnings.h";
// ============================================================================
// Indirect error
// ============================================================================
// --- indirect_error.h
#include "one_error.h"
// --- fail_import_indirect_error.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_indirect_error.carbon:[[@LINE+6]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./indirect_error.h:2:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_error.h:2:2: error: "error1" [CppInteropParseError]
// CHECK:STDERR: 2 | #error "error1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "indirect_error.h";
// ============================================================================
// Indirect warning
// ============================================================================
// --- indirect_warning.h
#include "one_warning.h"
// --- import_indirect_warning.carbon
library "[[@TEST_NAME]]";
//@dump-sem-ir-begin
// CHECK:STDERR: import_indirect_warning.carbon:[[@LINE+6]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./indirect_warning.h:2:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_warning.h:2:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 2 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "indirect_warning.h";
//@dump-sem-ir-end
// ============================================================================
// Lexer error before import
// ============================================================================
// --- fail_import_cpp_library_lexer_error.carbon
library "[[@TEST_NAME]]"; // Trailing comment
// TODO: Move this warning to be after the lexer trailing comment error.
// CHECK:STDERR: fail_import_cpp_library_lexer_error.carbon:[[@LINE+9]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./one_warning.h:2:2: warning: "warning1" [CppInteropParseWarning]
// CHECK:STDERR: 2 | #warning "warning1"
// CHECK:STDERR: | ^
// CHECK:STDERR:
// CHECK:STDERR: fail_import_cpp_library_lexer_error.carbon:[[@LINE-8]]:44: error: trailing comments are not permitted [TrailingComment]
// CHECK:STDERR: library "import_cpp_library_lexer_error"; // Trailing comment
// CHECK:STDERR: ^
// CHECK:STDERR:
import Cpp library "one_warning.h";
// ============================================================================
// Diagnostic with fix-it hints
// ============================================================================
// --- fix_it_hints.h
double score = 0.1
// --- fail_import_fix_it_hints.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_import_fix_it_hints.carbon:[[@LINE+6]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./fix_it_hints.h:2:19: error: expected ';' after top level declarator [CppInteropParseError]
// CHECK:STDERR: 2 | double score = 0.1
// CHECK:STDERR: | ^
// CHECK:STDERR: | ;
// CHECK:STDERR:
import Cpp library "fix_it_hints.h";
fn F() {
// CHECK:STDERR: fail_import_fix_it_hints.carbon:[[@LINE+4]]:3: error: member name `foo` not found in `Cpp` [MemberNameNotFoundInInstScope]
// CHECK:STDERR: Cpp.foo();
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
Cpp.foo();
}
// ============================================================================
// Diagnostic with notes
// ============================================================================
// --- with_notes.h
void foobar(int);
inline void call_foobar() {
foobar(1, 2);
}
// --- fail_with_notes.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_with_notes.carbon:[[@LINE+9]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./with_notes.h:5:3: error: no matching function for call to 'foobar' [CppInteropParseError]
// CHECK:STDERR: 5 | foobar(1, 2);
// CHECK:STDERR: | ^~~~~~
// CHECK:STDERR: fail_with_notes.carbon:[[@LINE+5]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./with_notes.h:2:6: note: candidate function not viable: requires 1 argument, but 2 were provided [CppInteropParseNote]
// CHECK:STDERR: 2 | void foobar(int);
// CHECK:STDERR: | ^ ~~~
// CHECK:STDERR:
import Cpp library "with_notes.h";
fn F() {
Cpp.call_foobar();
}
// ============================================================================
// Context stacks
// ============================================================================
// --- indirect_include.h
#define FOO BAR
#define BAZ void f(error);
FOO
// --- direct_include.h
#define BAR BAZ
#include "indirect_include.h"
// --- fail_use_context_stack.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_use_context_stack.carbon:[[@LINE+15]]:10: in file included here [InCppInclude]
// CHECK:STDERR: ./direct_include.h:4:10: in file included here [InCppInclude]
// CHECK:STDERR: ./indirect_include.h:2:13: in expansion of macro defined here [InCppMacroExpansion]
// CHECK:STDERR: ./direct_include.h:2:13: in expansion of macro defined here [InCppMacroExpansion]
// CHECK:STDERR: ./indirect_include.h:3:20: in expansion of macro defined here [InCppMacroExpansion]
// CHECK:STDERR: ./indirect_include.h:5:1: error: unknown type name 'error' [CppInteropParseError]
// CHECK:STDERR: 5 | FOO
// CHECK:STDERR: | ^
// CHECK:STDERR: 2 | #define FOO BAR
// CHECK:STDERR: | ^
// CHECK:STDERR: 2 | #define BAR BAZ
// CHECK:STDERR: | ^
// CHECK:STDERR: 3 | #define BAZ void f(error);
// CHECK:STDERR: | ^
// CHECK:STDERR:
import Cpp library "direct_include.h";
// ============================================================================
// Diagnostic location in inline code.
// ============================================================================
// --- fail_loc_in_inline_simple.carbon
library "[[@TEST_NAME]]";
// CHECK:STDERR: fail_loc_in_inline_simple.carbon:[[@LINE+4]]:9: error: use of undeclared identifier 'banana' [CppInteropParseError]
// CHECK:STDERR: 8 | int n = banana;
// CHECK:STDERR: | ^~~~~~
// CHECK:STDERR:
import Cpp inline "int n = banana;";
// --- fail_loc_in_inline_block.carbon
import Cpp inline '''c++
void f(const int n) {
// CHECK:STDERR: fail_loc_in_inline_block.carbon:[[@LINE+7]]:3: error: cannot assign to variable 'n' with const-qualified type 'const int' [CppInteropParseError]
// CHECK:STDERR: 11 | ++n;
// CHECK:STDERR: | ^ ~
// CHECK:STDERR: fail_loc_in_inline_block.carbon:[[@LINE-4]]:18: note: variable 'n' declared const here [CppInteropParseNote]
// CHECK:STDERR: 3 | void f(const int n) {
// CHECK:STDERR: | ~~~~~~~~~~^
// CHECK:STDERR:
++n;
}
''';
// CHECK:STDOUT: --- import_cpp_file_with_one_warning.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT: import Cpp "one_warning.h"
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_cpp_file_with_multiple_warnings.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT: import Cpp "multiple_warnings.h"
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_multiple_cpp_files_with_warnings.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT: import Cpp "one_warning.h"
// CHECK:STDOUT: import Cpp "multiple_warnings.h"
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- import_indirect_warning.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT: import Cpp "indirect_warning.h"
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: