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Merge branch 'cpp11'

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Defaults fish to build as C++11 by default.
See #3572.
This commit is contained in:
ridiculousfish 2016-11-26 13:10:00 -08:00
commit fb63bee322
6 changed files with 618 additions and 194 deletions
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4
Makefile.in
View file

@ -870,9 +870,9 @@ depend: | show-MKDIR_P
# TODO - why not have the Makefile run lint.fish on actual files itself (generate a report target?)
#
lint:
$v build_tools/lint.fish $(CXX) $(CXXFLAGS) $(CPPFLAGS)
$v build_tools/lint.fish "$(CXX)" $(CXXFLAGS) $(CPPFLAGS)
lint-all:
$v build_tools/lint.fish $(CXX) --all $(CXXFLAGS) $(CPPFLAGS)
$v build_tools/lint.fish "$(CXX)" --all $(CXXFLAGS) $(CPPFLAGS)
.PHONY: lint lint-all
#

2
build_tools/lint.fish
View file

@ -106,7 +106,7 @@ if set -q c_files[1]
set -l cm (set_color magenta)
set -l cbrm (set_color brmagenta)
set -l template "[$cb$cu{file}$cn$cb:{line}$cn] $cbrm{severity}$cm ({id}):$cn\n {message}"
set cppcheck_args -q --verbose --std=posix --language=c++ --template $template \
set cppcheck_args -q --verbose --std=c++11 --std=posix --language=c++ --template $template \
--suppress=missingIncludeSystem --inline-suppr --enable=$cppchecks \
--rule-file=.cppcheck.rules --suppressions-list=.cppcheck.suppressions $cppcheck_args

8
configure.ac
View file

@ -15,6 +15,7 @@ AC_INIT(fish,
m4_esyscmd([cut -f 3 -d ' ' FISH-BUILD-VERSION-FILE | tr -d '\n']),
fish-users@lists.sourceforge.net)
ac_clean_files=a.out.dSYM
#
# List of output variables produced by this configure script
#
@ -81,6 +82,12 @@ else
AC_MSG_RESULT([no])
fi
#
# Include the autoconf macros directory
#
AC_CONFIG_MACRO_DIRS([m4])
#
# Set up various programs needed for install
# Note AC_PROG_CXX sets CXXFLAGS if not set, which we want
@ -97,6 +104,7 @@ AC_PROG_AWK
AC_PROG_FGREP
AC_PROG_SED
AC_USE_SYSTEM_EXTENSIONS
AX_CXX_COMPILE_STDCXX_11(noext,mandatory)
#
# Tell autoconf to create config.h header

197
fish.xcodeproj/project.pbxproj
View file

@ -1751,18 +1751,6 @@
};
name = Release;
};
9C7A55711DCD71330049C25D /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
COPY_PHASE_STRIP = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
GCC_ENABLE_OBJC_EXCEPTIONS = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES;
LLVM_LTO = YES_THIN;
PRODUCT_NAME = "$(TARGET_NAME)";
};
name = "Release_C++11";
};
D007693F1990137800CA4627 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
@ -1789,139 +1777,6 @@
};
name = Release;
};
D00769411990137800CA4627 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
COPY_PHASE_STRIP = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
GCC_ENABLE_OBJC_EXCEPTIONS = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES;
LLVM_LTO = YES_THIN;
PRODUCT_NAME = fish_tests;
};
name = "Release_C++11";
};
D007FDDA17136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
CLANG_CXX_LIBRARY = "libc++";
CLANG_WARN_BOOL_CONVERSION = YES;
CLANG_WARN_CONSTANT_CONVERSION = YES;
CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
CLANG_WARN_EMPTY_BODY = YES;
CLANG_WARN_ENUM_CONVERSION = YES;
CLANG_WARN_INFINITE_RECURSION = YES;
CLANG_WARN_INT_CONVERSION = YES;
CLANG_WARN_NULLABLE_TO_NONNULL_CONVERSION = YES;
CLANG_WARN_SUSPICIOUS_MOVE = YES;
CLANG_WARN_UNREACHABLE_CODE = YES;
CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
DEAD_CODE_STRIPPING = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
ENABLE_STRICT_OBJC_MSGSEND = YES;
GCC_ENABLE_CPP_EXCEPTIONS = NO;
GCC_ENABLE_CPP_RTTI = NO;
GCC_NO_COMMON_BLOCKS = YES;
GCC_PREPROCESSOR_DEFINITIONS = (
"LOCALEDIR=\\\"/usr/local/share/locale\\\"",
"PREFIX=L\\\"/usr/local\\\"",
"DATADIR=L\\\"/usr/local/share\\\"",
"SYSCONFDIR=L\\\"/usr/local/etc\\\"",
"BINDIR=L\\\"/usr/local/bin\\\"",
"DOCDIR=L\\\"/usr/local/share/doc\\\"",
);
GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
GCC_WARN_ABOUT_RETURN_TYPE = YES;
GCC_WARN_UNDECLARED_SELECTOR = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES;
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_LABEL = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
MACOSX_DEPLOYMENT_TARGET = 10.7;
SDKROOT = macosx;
USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/osx $(SRCROOT)/osx/shared_headers $(SHARED_DERIVED_FILE_DIR)";
WARNING_CFLAGS = (
"-Wall",
"-Wunused-macros",
);
};
name = "Release_C++11";
};
D007FDDB17136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
COMBINE_HIDPI_IMAGES = YES;
INSTALL_PATH = /usr/local;
PRODUCT_NAME = "base copy";
SKIP_INSTALL = NO;
};
name = "Release_C++11";
};
D007FDDC17136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
COMBINE_HIDPI_IMAGES = YES;
INSTALL_PATH = /usr/local;
PRODUCT_NAME = "$(TARGET_NAME)";
SKIP_INSTALL = NO;
};
name = "Release_C++11";
};
D007FDDD17136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
COMBINE_HIDPI_IMAGES = YES;
COPY_PHASE_STRIP = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
EXECUTABLE_NAME = fish_launcher;
GCC_ENABLE_OBJC_EXCEPTIONS = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES;
INFOPLIST_FILE = osx/Info.plist;
LLVM_LTO = YES_THIN;
PRODUCT_BUNDLE_IDENTIFIER = "com.ridiculousfish.fish-shell";
PRODUCT_NAME = fish;
WRAPPER_EXTENSION = app;
};
name = "Release_C++11";
};
D007FDDE17136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
COPY_PHASE_STRIP = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
GCC_ENABLE_OBJC_EXCEPTIONS = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES;
LLVM_LTO = YES_THIN;
PRODUCT_NAME = fish;
};
name = "Release_C++11";
};
D007FDE017136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
COPY_PHASE_STRIP = YES;
DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
GCC_ENABLE_OBJC_EXCEPTIONS = YES;
GCC_WARN_UNINITIALIZED_AUTOS = YES;
LLVM_LTO = YES_THIN;
PRODUCT_NAME = "$(TARGET_NAME)";
};
name = "Release_C++11";
};
D007FDE217136EAA00A52BE6 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
COMBINE_HIDPI_IMAGES = YES;
PRODUCT_NAME = "$(TARGET_NAME)";
};
name = "Release_C++11";
};
D008D0C51BC58F8800841177 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
@ -1936,13 +1791,6 @@
};
name = Release;
};
D008D0C71BC58F8800841177 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
PRODUCT_NAME = "$(TARGET_NAME)";
};
name = "Release_C++11";
};
D04F7FD21BA4E29300B0F227 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
@ -1995,32 +1843,6 @@
};
name = Release;
};
D04F7FD41BA4E29300B0F227 /* Release_C++11 */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
GCC_INPUT_FILETYPE = sourcecode.c.c;
GCC_PREPROCESSOR_DEFINITIONS = (
"LOCALEDIR=\\\"/usr/local/share/locale\\\"",
"PREFIX=L\\\"/usr/local\\\"",
"DATADIR=L\\\"/usr/local/share\\\"",
"SYSCONFDIR=L\\\"/usr/local/etc\\\"",
"BINDIR=L\\\"/usr/local/bin\\\"",
"DOCDIR=L\\\"/usr/local/share/doc\\\"",
"PCRE2_CODE_UNIT_WIDTH=32",
"HAVE_CONFIG_H=1",
);
GCC_WARN_64_TO_32_BIT_CONVERSION = NO;
GCC_WARN_UNUSED_VARIABLE = NO;
LLVM_LTO = YES_THIN;
PRODUCT_NAME = "$(TARGET_NAME)";
SKIP_INSTALL = YES;
USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/osx/pcre2 $(SRCROOT)/osx/shared_headers/";
USE_HEADERMAP = NO;
WARNING_CFLAGS = "";
};
name = "Release_C++11";
};
D07D267015E33B86009E43F6 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
@ -2045,6 +1867,8 @@
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
CLANG_CXX_LIBRARY = "libc++";
CLANG_WARN_BOOL_CONVERSION = YES;
CLANG_WARN_CONSTANT_CONVERSION = YES;
CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
@ -2080,7 +1904,7 @@
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_LABEL = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
MACOSX_DEPLOYMENT_TARGET = 10.6;
MACOSX_DEPLOYMENT_TARGET = 10.7;
ONLY_ACTIVE_ARCH = YES;
SDKROOT = macosx;
USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/osx $(SRCROOT)/osx/shared_headers $(SHARED_DERIVED_FILE_DIR)";
@ -2095,6 +1919,8 @@
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
CLANG_CXX_LIBRARY = "libc++";
CLANG_WARN_BOOL_CONVERSION = YES;
CLANG_WARN_CONSTANT_CONVERSION = YES;
CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
@ -2128,7 +1954,7 @@
GCC_WARN_UNUSED_FUNCTION = YES;
GCC_WARN_UNUSED_LABEL = YES;
GCC_WARN_UNUSED_VARIABLE = YES;
MACOSX_DEPLOYMENT_TARGET = 10.6;
MACOSX_DEPLOYMENT_TARGET = 10.7;
SDKROOT = macosx;
USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/osx $(SRCROOT)/osx/shared_headers $(SHARED_DERIVED_FILE_DIR)";
WARNING_CFLAGS = (
@ -2276,7 +2102,6 @@
buildConfigurations = (
9C7A556F1DCD71330049C25D /* Debug */,
9C7A55701DCD71330049C25D /* Release */,
9C7A55711DCD71330049C25D /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2286,7 +2111,6 @@
buildConfigurations = (
D007693F1990137800CA4627 /* Debug */,
D00769401990137800CA4627 /* Release */,
D00769411990137800CA4627 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2296,7 +2120,6 @@
buildConfigurations = (
D008D0C51BC58F8800841177 /* Debug */,
D008D0C61BC58F8800841177 /* Release */,
D008D0C71BC58F8800841177 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2306,7 +2129,6 @@
buildConfigurations = (
D04F7FD21BA4E29300B0F227 /* Debug */,
D04F7FD31BA4E29300B0F227 /* Release */,
D04F7FD41BA4E29300B0F227 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2316,7 +2138,6 @@
buildConfigurations = (
D07D267015E33B86009E43F6 /* Debug */,
D07D267115E33B86009E43F6 /* Release */,
D007FDDB17136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2326,7 +2147,6 @@
buildConfigurations = (
D0A084F813B3AC130099B651 /* Debug */,
D0A084F913B3AC130099B651 /* Release */,
D007FDDA17136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2336,7 +2156,6 @@
buildConfigurations = (
D0A564E7168CFDD800AF6161 /* Debug */,
D0A564E8168CFDD800AF6161 /* Release */,
D007FDE217136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2346,7 +2165,6 @@
buildConfigurations = (
D0D02AA515985A75008E62BD /* Debug */,
D0D02AA615985A75008E62BD /* Release */,
D007FDDD17136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2356,7 +2174,6 @@
buildConfigurations = (
D0D02AD41598642A008E62BD /* Debug */,
D0D02AD51598642A008E62BD /* Release */,
D007FDE017136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2366,7 +2183,6 @@
buildConfigurations = (
D0D26944159835CA005D9B9C /* Debug */,
D0D26945159835CA005D9B9C /* Release */,
D007FDDE17136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;
@ -2376,7 +2192,6 @@
buildConfigurations = (
D0F019EE15A976F30034B3B1 /* Debug */,
D0F019EF15A976F30034B3B1 /* Release */,
D007FDDC17136EAA00A52BE6 /* Release_C++11 */,
);
defaultConfigurationIsVisible = 0;
defaultConfigurationName = Release;

562
m4/ax_cxx_compile_stdcxx.m4 Normal file
View file

@ -0,0 +1,562 @@
# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
# Check for baseline language coverage in the compiler for the specified
# version of the C++ standard. If necessary, add switches to CXX and
# CXXCPP to enable support. VERSION may be '11' (for the C++11 standard)
# or '14' (for the C++14 standard).
#
# The second argument, if specified, indicates whether you insist on an
# extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
# -std=c++11). If neither is specified, you get whatever works, with
# preference for an extended mode.
#
# The third argument, if specified 'mandatory' or if left unspecified,
# indicates that baseline support for the specified C++ standard is
# required and that the macro should error out if no mode with that
# support is found. If specified 'optional', then configuration proceeds
# regardless, after defining HAVE_CXX${VERSION} if and only if a
# supporting mode is found.
#
# LICENSE
#
# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
# Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
# Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
# Copyright (c) 2015 Paul Norman <penorman@mac.com>
# Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 4
dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
dnl (serial version number 13).
AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
m4_if([$1], [11], [],
[$1], [14], [],
[$1], [17], [m4_fatal([support for C++17 not yet implemented in AX_CXX_COMPILE_STDCXX])],
[m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
m4_if([$2], [], [],
[$2], [ext], [],
[$2], [noext], [],
[m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl
m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true],
[$3], [mandatory], [ax_cxx_compile_cxx$1_required=true],
[$3], [optional], [ax_cxx_compile_cxx$1_required=false],
[m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
AC_LANG_PUSH([C++])dnl
ac_success=no
AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
ax_cv_cxx_compile_cxx$1,
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
[ax_cv_cxx_compile_cxx$1=yes],
[ax_cv_cxx_compile_cxx$1=no])])
if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
ac_success=yes
fi
m4_if([$2], [noext], [], [dnl
if test x$ac_success = xno; then
for switch in -std=gnu++$1 -std=gnu++0x; do
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
$cachevar,
[ac_save_CXX="$CXX"
CXX="$CXX $switch"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
[eval $cachevar=yes],
[eval $cachevar=no])
CXX="$ac_save_CXX"])
if eval test x\$$cachevar = xyes; then
CXX="$CXX $switch"
if test -n "$CXXCPP" ; then
CXXCPP="$CXXCPP $switch"
fi
ac_success=yes
break
fi
done
fi])
m4_if([$2], [ext], [], [dnl
if test x$ac_success = xno; then
dnl HP's aCC needs +std=c++11 according to:
dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf
dnl Cray's crayCC needs "-h std=c++11"
for switch in -std=c++$1 -std=c++0x +std=c++$1 "-h std=c++$1"; do
cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
$cachevar,
[ac_save_CXX="$CXX"
CXX="$CXX $switch"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
[eval $cachevar=yes],
[eval $cachevar=no])
CXX="$ac_save_CXX"])
if eval test x\$$cachevar = xyes; then
CXX="$CXX $switch"
if test -n "$CXXCPP" ; then
CXXCPP="$CXXCPP $switch"
fi
ac_success=yes
break
fi
done
fi])
AC_LANG_POP([C++])
if test x$ax_cxx_compile_cxx$1_required = xtrue; then
if test x$ac_success = xno; then
AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.])
fi
fi
if test x$ac_success = xno; then
HAVE_CXX$1=0
AC_MSG_NOTICE([No compiler with C++$1 support was found])
else
HAVE_CXX$1=1
AC_DEFINE(HAVE_CXX$1,1,
[define if the compiler supports basic C++$1 syntax])
fi
AC_SUBST(HAVE_CXX$1)
])
dnl Test body for checking C++11 support
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11],
_AX_CXX_COMPILE_STDCXX_testbody_new_in_11
)
dnl Test body for checking C++14 support
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
_AX_CXX_COMPILE_STDCXX_testbody_new_in_11
_AX_CXX_COMPILE_STDCXX_testbody_new_in_14
)
dnl Tests for new features in C++11
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[
// If the compiler admits that it is not ready for C++11, why torture it?
// Hopefully, this will speed up the test.
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201103L
#error "This is not a C++11 compiler"
#else
namespace cxx11
{
namespace test_static_assert
{
template <typename T>
struct check
{
static_assert(sizeof(int) <= sizeof(T), "not big enough");
};
}
namespace test_final_override
{
struct Base
{
virtual void f() {}
};
struct Derived : public Base
{
virtual void f() override {}
};
}
namespace test_double_right_angle_brackets
{
template < typename T >
struct check {};
typedef check<void> single_type;
typedef check<check<void>> double_type;
typedef check<check<check<void>>> triple_type;
typedef check<check<check<check<void>>>> quadruple_type;
}
namespace test_decltype
{
int
f()
{
int a = 1;
decltype(a) b = 2;
return a + b;
}
}
namespace test_type_deduction
{
template < typename T1, typename T2 >
struct is_same
{
static const bool value = false;
};
template < typename T >
struct is_same<T, T>
{
static const bool value = true;
};
template < typename T1, typename T2 >
auto
add(T1 a1, T2 a2) -> decltype(a1 + a2)
{
return a1 + a2;
}
int
test(const int c, volatile int v)
{
static_assert(is_same<int, decltype(0)>::value == true, "");
static_assert(is_same<int, decltype(c)>::value == false, "");
static_assert(is_same<int, decltype(v)>::value == false, "");
auto ac = c;
auto av = v;
auto sumi = ac + av + 'x';
auto sumf = ac + av + 1.0;
static_assert(is_same<int, decltype(ac)>::value == true, "");
static_assert(is_same<int, decltype(av)>::value == true, "");
static_assert(is_same<int, decltype(sumi)>::value == true, "");
static_assert(is_same<int, decltype(sumf)>::value == false, "");
static_assert(is_same<int, decltype(add(c, v))>::value == true, "");
return (sumf > 0.0) ? sumi : add(c, v);
}
}
namespace test_noexcept
{
int f() { return 0; }
int g() noexcept { return 0; }
static_assert(noexcept(f()) == false, "");
static_assert(noexcept(g()) == true, "");
}
namespace test_constexpr
{
template < typename CharT >
unsigned long constexpr
strlen_c_r(const CharT *const s, const unsigned long acc) noexcept
{
return *s ? strlen_c_r(s + 1, acc + 1) : acc;
}
template < typename CharT >
unsigned long constexpr
strlen_c(const CharT *const s) noexcept
{
return strlen_c_r(s, 0UL);
}
static_assert(strlen_c("") == 0UL, "");
static_assert(strlen_c("1") == 1UL, "");
static_assert(strlen_c("example") == 7UL, "");
static_assert(strlen_c("another\0example") == 7UL, "");
}
namespace test_rvalue_references
{
template < int N >
struct answer
{
static constexpr int value = N;
};
answer<1> f(int&) { return answer<1>(); }
answer<2> f(const int&) { return answer<2>(); }
answer<3> f(int&&) { return answer<3>(); }
void
test()
{
int i = 0;
const int c = 0;
static_assert(decltype(f(i))::value == 1, "");
static_assert(decltype(f(c))::value == 2, "");
static_assert(decltype(f(0))::value == 3, "");
}
}
namespace test_uniform_initialization
{
struct test
{
static const int zero {};
static const int one {1};
};
static_assert(test::zero == 0, "");
static_assert(test::one == 1, "");
}
namespace test_lambdas
{
void
test1()
{
auto lambda1 = [](){};
auto lambda2 = lambda1;
lambda1();
lambda2();
}
int
test2()
{
auto a = [](int i, int j){ return i + j; }(1, 2);
auto b = []() -> int { return '0'; }();
auto c = [=](){ return a + b; }();
auto d = [&](){ return c; }();
auto e = [a, &b](int x) mutable {
const auto identity = [](int y){ return y; };
for (auto i = 0; i < a; ++i)
a += b--;
return x + identity(a + b);
}(0);
return a + b + c + d + e;
}
int
test3()
{
const auto nullary = [](){ return 0; };
const auto unary = [](int x){ return x; };
using nullary_t = decltype(nullary);
using unary_t = decltype(unary);
const auto higher1st = [](nullary_t f){ return f(); };
const auto higher2nd = [unary](nullary_t f1){
return [unary, f1](unary_t f2){ return f2(unary(f1())); };
};
return higher1st(nullary) + higher2nd(nullary)(unary);
}
}
namespace test_variadic_templates
{
template <int...>
struct sum;
template <int N0, int... N1toN>
struct sum<N0, N1toN...>
{
static constexpr auto value = N0 + sum<N1toN...>::value;
};
template <>
struct sum<>
{
static constexpr auto value = 0;
};
static_assert(sum<>::value == 0, "");
static_assert(sum<1>::value == 1, "");
static_assert(sum<23>::value == 23, "");
static_assert(sum<1, 2>::value == 3, "");
static_assert(sum<5, 5, 11>::value == 21, "");
static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, "");
}
// http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae
// Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function
// because of this.
namespace test_template_alias_sfinae
{
struct foo {};
template<typename T>
using member = typename T::member_type;
template<typename T>
void func(...) {}
template<typename T>
void func(member<T>*) {}
void test();
void test() { func<foo>(0); }
}
} // namespace cxx11
#endif // __cplusplus >= 201103L
]])
dnl Tests for new features in C++14
m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[
// If the compiler admits that it is not ready for C++14, why torture it?
// Hopefully, this will speed up the test.
#ifndef __cplusplus
#error "This is not a C++ compiler"
#elif __cplusplus < 201402L
#error "This is not a C++14 compiler"
#else
namespace cxx14
{
namespace test_polymorphic_lambdas
{
int
test()
{
const auto lambda = [](auto&&... args){
const auto istiny = [](auto x){
return (sizeof(x) == 1UL) ? 1 : 0;
};
const int aretiny[] = { istiny(args)... };
return aretiny[0];
};
return lambda(1, 1L, 1.0f, '1');
}
}
namespace test_binary_literals
{
constexpr auto ivii = 0b0000000000101010;
static_assert(ivii == 42, "wrong value");
}
namespace test_generalized_constexpr
{
template < typename CharT >
constexpr unsigned long
strlen_c(const CharT *const s) noexcept
{
auto length = 0UL;
for (auto p = s; *p; ++p)
++length;
return length;
}
static_assert(strlen_c("") == 0UL, "");
static_assert(strlen_c("x") == 1UL, "");
static_assert(strlen_c("test") == 4UL, "");
static_assert(strlen_c("another\0test") == 7UL, "");
}
namespace test_lambda_init_capture
{
int
test()
{
auto x = 0;
const auto lambda1 = [a = x](int b){ return a + b; };
const auto lambda2 = [a = lambda1(x)](){ return a; };
return lambda2();
}
}
namespace test_digit_seperators
{
constexpr auto ten_million = 100'000'000;
static_assert(ten_million == 100000000, "");
}
namespace test_return_type_deduction
{
auto f(int& x) { return x; }
decltype(auto) g(int& x) { return x; }
template < typename T1, typename T2 >
struct is_same
{
static constexpr auto value = false;
};
template < typename T >
struct is_same<T, T>
{
static constexpr auto value = true;
};
int
test()
{
auto x = 0;
static_assert(is_same<int, decltype(f(x))>::value, "");
static_assert(is_same<int&, decltype(g(x))>::value, "");
return x;
}
}
} // namespace cxx14
#endif // __cplusplus >= 201402L
]])

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m4/ax_cxx_compile_stdcxx_11.m4 Normal file
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@ -0,0 +1,39 @@
# ============================================================================
# http://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_11.html
# ============================================================================
#
# SYNOPSIS
#
# AX_CXX_COMPILE_STDCXX_11([ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
# Check for baseline language coverage in the compiler for the C++11
# standard; if necessary, add switches to CXX and CXXCPP to enable
# support.
#
# This macro is a convenience alias for calling the AX_CXX_COMPILE_STDCXX
# macro with the version set to C++11. The two optional arguments are
# forwarded literally as the second and third argument respectively.
# Please see the documentation for the AX_CXX_COMPILE_STDCXX macro for
# more information. If you want to use this macro, you also need to
# download the ax_cxx_compile_stdcxx.m4 file.
#
# LICENSE
#
# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
# Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
# Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
# Copyright (c) 2015 Paul Norman <penorman@mac.com>
# Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 17
AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [AX_CXX_COMPILE_STDCXX([11], [$1], [$2])])