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50 lines
1.9 KiB
C++
50 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 COMMON_CHECK_H_
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#define COMMON_CHECK_H_
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#include "common/check_internal.h"
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namespace Carbon {
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// Raw exiting stream. This should be used when building other forms of exiting
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// macros like those below. It evaluates to a temporary `ExitingStream` object
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// that can be manipulated, streamed into, and then will exit the program.
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#define RAW_EXITING_STREAM() \
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Carbon::Internal::ExitingStream::Helper() | Carbon::Internal::ExitingStream()
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// Checks the given condition, and if it's false, prints a stack, streams the
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// error message, then exits. This should be used for unexpected errors, such as
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// a bug in the application.
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//
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// For example:
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// CHECK(is_valid) << "Data is not valid!";
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#define CHECK(condition) \
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(condition) ? (void)0 \
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: RAW_EXITING_STREAM().TreatAsBug() \
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<< "CHECK failure at " << __FILE__ << ":" << __LINE__ \
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<< ": " #condition \
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<< Carbon::Internal::ExitingStream::AddSeparator()
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// DCHECK calls CHECK in debug mode, and does nothing otherwise.
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#ifndef NDEBUG
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#define DCHECK(condition) CHECK(condition)
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#else
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#define DCHECK(condition) CHECK(true || (condition))
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#endif
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// This is similar to CHECK, but is unconditional. Writing FATAL() is clearer
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// than CHECK(false) because it avoids confusion about control flow.
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//
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// For example:
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// FATAL() << "Unreachable!";
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#define FATAL() \
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RAW_EXITING_STREAM().TreatAsBug() \
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<< "FATAL failure at " << __FILE__ << ":" << __LINE__ << ": "
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} // namespace Carbon
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#endif // COMMON_CHECK_H_
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