DemanglerAssert.h

//===--- DemanglerAssert.h - Assertions for de/re-mangling ------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file implements a macro, DEMANGLE_ASSERT(), which will assert in the
// compiler, but in the runtime will return a ManglingError on failure.
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_DEMANGLING_ASSERT_H
#define SWIFT_DEMANGLING_ASSERT_H

#include "llvm/Support/Compiler.h"
#include "swift/Demangling/Demangle.h"
#include "swift/Demangling/NamespaceMacros.h"

#if SWIFT_RUNTIME

// In the runtime, DEMANGLER_ASSERT() returns an error
#define DEMANGLER_ASSERT(expr, node)                                           \
  do {                                                                         \
    if (!(expr))                                                               \
      return ManglingError(ManglingError::AssertionFailed, (node), __LINE__);  \
  } while (0)

#elif !defined(NDEBUG)

// If NDEBUG is not defined, DEMANGLER_ASSERT() works like assert()
#define DEMANGLER_ASSERT(expr, node)                                           \
  do {                                                                         \
    if (!(expr))                                                               \
      swift::Demangle::failAssert(__FILE__, __LINE__, node, #expr);            \
  } while (0)

#else

// Otherwise, DEMANGLER_ASSERT() does nothing
#define DEMANGLER_ASSERT(expr, node)

#endif // SWIFT_RUNTIME

namespace swift {
namespace Demangle {
SWIFT_BEGIN_INLINE_NAMESPACE

[[noreturn]] void failAssert(const char *file, unsigned line, NodePointer node,
                             const char *expr);

SWIFT_END_INLINE_NAMESPACE
} // end namespace Demangle
} // end namespace swift

#endif // SWIFT_DEMANGLING_ASSERT_H