clang ++ 3.1但在Lion Xcode上沒有cxx_lambdas 4.3.3

這與Clang 3.1 and C++11 support status有關，但我找不到答案，我在這裏更具體：cxx_lambdas支持鏗鏘3.1對我的確切設置。clang ++ 3.1但在Lion Xcode上沒有cxx_lambdas 4.3.3

我在OSX Lion 10.7.4上安裝了Xcode 4.3.3和最新的命令行工具包（2012年6月11日）。我現在有鐺++ 3.1版：

[email protected]:~/projects/tests/C++11$ clang++ -v 
Apple clang version 3.1 (tags/Apple/clang-318.0.61) (based on LLVM 3.1svn) 
Target: x86_64-apple-darwin11.4.0 
Thread model: posix

基於http://clang.llvm.org/cxx_status.html，我期待擁有cxx_lambdas是可用的，但是這不是我得到：

[email protected]:~/projects/tests/C++11$ make 
clang++ -std=c++11 -stdlib=libc++ test_clang_features.cpp -o test_clang_features 

[email protected]:~/projects/tests/C++11$ ./test_clang_features 
FAILED feature tests: 
__has_feature(cxx_constexpr) .................................. FAILED 
__has_feature(cxx_generalized_initializers) ................... FAILED 
__has_feature(cxx_inheriting_constructors) .................... FAILED 
__has_feature(cxx_lambdas) .................................... FAILED 
__has_feature(cxx_local_type_template_args) ................... FAILED 
__has_feature(cxx_unrestricted_unions) ........................ FAILED 
__has_feature(cxx_user_literals) .............................. FAILED

這裏是代碼我跑去得到這個報告：

#include <iostream> 
using namespace std; 
void main() 
{ 
    cout << "FAILED feature tests: " << endl; 

// testing all features cxx_???? described in (only 3 shown here): 
//  http://llvm.org/releases/3.1/tools/clang/docs/LanguageExtensions.html#cxx11 

#if !__has_feature(cxx_generalized_initializers) 
    cout << "__has_feature(cxx_generalized_initializers) ................... FAILED" << endl; 
#endif 
#if !__has_feature(cxx_implicit_moves) 
    cout << "__has_feature(cxx_implicit_moves) ............................. FAILED" << endl; 
#endif 
//... analogous tests ... 
#if !__has_feature(cxx_lambdas) 
    cout << "__has_feature(cxx_lambdas) .................................... FAILED" << endl; 
#endif 
}

請注意，cxx_lambdas失敗。這裏是功能的完整列表測試：

cxx_access_control_sfinae cxx_alias_templates cxx_alignas 
cxx_attributes cxx_auto_type cxx_constexpr cxx_decltype 
cxx_default_function_template_args cxx_defaulted_functions 
cxx_delegating_constructors cxx_deleted_functions cxx_exceptions 
cxx_explicit_conversions cxx_generalized_initializers 
cxx_implicit_moves cxx_inheriting_constructors cxx_inline_namespaces 
cxx_lambdas cxx_local_type_template_args cxx_noexcept 
cxx_nonstatic_member_init cxx_nullptr cxx_override_control 
cxx_range_for cxx_raw_string_literals 
cxx_reference_qualified_functions cxx_rtti cxx_rvalue_references 
cxx_static_assert cxx_strong_enums cxx_trailing_return 
cxx_unicode_literals cxx_unrestricted_unions cxx_user_literals 
cxx_variadic_templates

爲什麼cxx_lambdas不可在此設置鐺++ 3.1的？

來源

2012-06-23 llins

'蘋果鐺版本3.1'是不一樣'鏘版本3.1'。感謝蘋果公司製作難度較大的簡單內容。 – ildjarn

黏巴達將提供支持和Xcode 4.4或以上版本
作爲ildjarn指出，蘋果公司的鐺/ LLVM分佈定製......

來源

2012-06-24 03:34:34

clang ++ 3.1但在Lion Xcode上沒有cxx_lambdas 4.3.3

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