config/gcc-stl-wrapper.template.h
author Nicholas Nethercote <nnethercote@mozilla.com>
Wed, 27 Sep 2017 20:19:33 +1000
changeset 384370 15306340c1beda0eea937fa85b7e11a3d1110d9d
parent 298410 68da139d0866977c0ada86319fa94388f2255446
child 395378 0c9996186048d2ad338c153861fb1c8aa80ce181
permissions -rw-r--r--
Bug 1403506 - Remove nsTFixedString<T>. r=erahm. (patch is actually r=erahm,mystor) nsTFixedString<T> is only used as a base class for nsTAutoStringN<T, N>, so this patch merges the former into the latter, cutting some code and simplifying the string class hierarchy. Because the "Fixed" name is now gone, the patch also renames StringDataFlags::FIXED as INLINE and ClassDataFlags::FIXED as INLINE. The patch also removes nsFixed[C]String and ns_auto_[c]string! from Rust code because nsAutoString can't be implemented directly in Rust due to its move semantics. There were only two uses of ns_auto_string! outside of tests so this seems like a minor loss. MozReview-Commit-ID: 8ntximghiut

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_${HEADER}_h
#define mozilla_${HEADER}_h

// For some reason, Apple's GCC refuses to honor -fno-exceptions when
// compiling ObjC.
#if defined(__EXCEPTIONS) && __EXCEPTIONS && !(__OBJC__ && __GNUC__ && XP_IOS)
#  error "STL code can only be used with -fno-exceptions"
#endif

// Silence "warning: #include_next is a GCC extension"
#pragma GCC system_header

#if defined(DEBUG) && !defined(_GLIBCXX_DEBUG)
// Enable checked iterators and other goodies
//
// FIXME/bug 551254: gcc's debug STL implementation requires -frtti.
// Figure out how to resolve this with -fno-rtti.  Maybe build with
// -frtti in DEBUG builds?
//
//  # define _GLIBCXX_DEBUG 1
#endif

// Don't include mozalloc for cstdlib. See bug 1245076.
#ifndef moz_dont_include_mozalloc_for_cstdlib
#  define moz_dont_include_mozalloc_for_cstdlib
#endif

// Include mozalloc after the STL header and all other headers it includes
// have been preprocessed.
#if !defined(MOZ_INCLUDE_MOZALLOC_H) && \
    !defined(moz_dont_include_mozalloc_for_${HEADER})
#  define MOZ_INCLUDE_MOZALLOC_H
#  define MOZ_INCLUDE_MOZALLOC_H_FROM_${HEADER}
#endif

#pragma GCC visibility push(default)
#include_next <${HEADER}>
#pragma GCC visibility pop

#ifdef MOZ_INCLUDE_MOZALLOC_H_FROM_${HEADER}
// See if we're in code that can use mozalloc.  NB: this duplicates
// code in nscore.h because nscore.h pulls in prtypes.h, and chromium
// can't build with that being included before base/basictypes.h.
#  if !defined(XPCOM_GLUE) && !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
#    include "mozilla/mozalloc.h"
#  else
#    error "STL code can only be used with infallible ::operator new()"
#  endif
#endif

// gcc calls a __throw_*() function from bits/functexcept.h when it
// wants to "throw an exception".  functexcept exists nominally to
// support -fno-exceptions, but since we'll always use the system
// libstdc++, and it's compiled with exceptions, then in practice
// these __throw_*() functions will always throw exceptions (shades of
// -fshort-wchar).  We don't want that and so define our own inlined
// __throw_*().
#ifndef mozilla_throw_gcc_h
#  include "mozilla/throw_gcc.h"
#endif

#endif  // if mozilla_${HEADER}_h