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https://github.com/carbon-language/carbon-lang.git
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Jon MeowandChandler Carruth
f0af3cb795
This is intended to: - Standardize use of line_num (and highlight where no line_num is available). - Standardize indications of runtime/compilation errors. - Make it incrementally easier to write new errors. Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef EXECUTABLE_SEMANTICS_COMMON_ERROR_H_
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#define EXECUTABLE_SEMANTICS_COMMON_ERROR_H_
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/raw_ostream.h"
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namespace Carbon {
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namespace ErrorInternal {
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// An error-printing stream that exits on destruction.
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class ExitingStream {
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public:
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// Ends the error with a newline and exits.
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LLVM_ATTRIBUTE_NORETURN virtual ~ExitingStream() {
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llvm::errs() << "\n";
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exit(-1);
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}
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// Forward output to llvm::errs.
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template <typename T>
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ExitingStream& operator<<(const T& message) {
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llvm::errs() << message;
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return *this;
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}
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};
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} // namespace ErrorInternal
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// Prints an error and exits. This should be used for non-recoverable errors
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// with user input.
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//
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// For example:
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// FATAL_USER_ERROR(line_num) << "Line is bad!";
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// FATAL_USER_ERROR_NO_LINE() << "Application is bad!";
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//
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// Where possible, try to identify the error as a compilation error or runtime
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// error. The generic user error option is provided as a fallback for cases that
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// don't fit either of those classifications.
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#define FATAL_USER_ERROR_NO_LINE() ErrorInternal::ExitingStream() << "ERROR: "
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#define FATAL_USER_ERROR(line) FATAL_USER_ERROR_NO_LINE() << line << ": "
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#define FATAL_COMPILATION_ERROR_NO_LINE() \
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ErrorInternal::ExitingStream() << "COMPILATION ERROR: "
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#define FATAL_COMPILATION_ERROR(line) \
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FATAL_COMPILATION_ERROR_NO_LINE() << line << ": "
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#define FATAL_RUNTIME_ERROR_NO_LINE() \
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ErrorInternal::ExitingStream() << "RUNTIME ERROR: "
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#define FATAL_RUNTIME_ERROR(line) FATAL_RUNTIME_ERROR_NO_LINE() << line << ": "
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_COMMON_ERROR_H_
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