编译非常简单的boost::spirit语法错误

Errors compiling very simple boost::spirit grammar

本文关键字：spirit 错误 语法 boost 非常 简单 编译      更新时间：2023-10-16

我一直在学习Boost::Spirit的教程，我正在尝试编译一个超级简单的解析器，用于将数字加在一起，大致基于文档中的MiniXML示例。我在Xcode 5.1.1中编译有问题。

我已经简化了它，发现即使语法的定义也无法编译。下面是它的当前状态:

Syntax.h: 

#pragma once
#include <boost/spirit/include/qi.hpp>
namespace qi = boost::spirit::qi;

template <typename Iterator>
struct ExpressionGrammer : qi::grammar<Iterator, double(), ascii::space_type>
{
    qi::rule<Iterator, double(), ascii::space_type> expression;
    qi::rule<Iterator, double(), ascii::space_type> addsub;
    ExpressionGrammer()
    : ExpressionGrammer::base_type(expression)
    {
        using qi::lit;
        addsub = (expression >> '+' >> expression)[_val = _1 + _2];     
        expression = (addsub | qi::double_)[_val = _1];
    }
};

Syntax.cpp: 

#include "Syntax.h"
// Nothing else

这些错误很长，很详细，但从一个解析问题"匿名结构的声明必须是一个定义"开始。我将把第一部分粘贴在这里。(注意行号不匹配，因为我省略了注释掉的代码)

In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:9:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.h:12:
In file included from ../../../Cinder/boost/boost/spirit/include/qi.hpp:16:
In file included from ../../../Cinder/boost/boost/spirit/home/qi.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/action.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/action/action.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/meta_compiler.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/support/meta_compiler.hpp:19:
In file included from ../../../Cinder/boost/boost/proto/proto.hpp:12:
In file included from ../../../Cinder/boost/boost/proto/core.hpp:21:
In file included from ../../../Cinder/boost/boost/proto/fusion.hpp:22:
In file included from ../../../Cinder/boost/boost/fusion/include/intrinsic.hpp:10:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/back.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/end.hpp:17:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/detail/segmented_end.hpp:10:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/detail/segmented_end_impl.hpp:14:
../../../Cinder/boost/boost/fusion/container/list/cons_fwd.hpp:13:5: error: declaration of anonymous struct must be a definition
    struct nil;
    ^
../../../Cinder/boost/boost/fusion/container/list/cons_fwd.hpp:13:5: warning: declaration does not declare anything [-Wmissing-declarations]
    struct nil;
    ^~~~~~
../../../Cinder/boost/boost/fusion/container/list/cons_fwd.hpp:15:44: error: expected a type
    template <typename Car, typename Cdr = nil>
                                           ^
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:1:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/SpiritTest_Prefix.pch:8:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/AppBasic.h:27:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/App.h:27:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/Renderer.h:32:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:23:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:38:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFBase.h:68:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/MacTypes.h:90:17: note: expanded from macro 'nil'
    #define nil NULL
                ^
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:1:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/SpiritTest_Prefix.pch:6:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/Cinder.h:92:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/chrono:280:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:203:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/cstddef:44:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/include/stddef.h:72:18: note: expanded from macro 'NULL'
#    define NULL __null
                 ^
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:9:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.h:12:
In file included from ../../../Cinder/boost/boost/spirit/include/qi.hpp:16:
In file included from ../../../Cinder/boost/boost/spirit/home/qi.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/action.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/action/action.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/meta_compiler.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/support/meta_compiler.hpp:19:
In file included from ../../../Cinder/boost/boost/proto/proto.hpp:12:
In file included from ../../../Cinder/boost/boost/proto/core.hpp:21:
In file included from ../../../Cinder/boost/boost/proto/fusion.hpp:22:
In file included from ../../../Cinder/boost/boost/fusion/include/intrinsic.hpp:10:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/back.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/end.hpp:17:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/detail/segmented_end.hpp:10:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/detail/segmented_end_impl.hpp:14:
../../../Cinder/boost/boost/fusion/container/list/cons_fwd.hpp:15:44: error: expected ',' or '>' in template-parameter-list
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:1:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/SpiritTest_Prefix.pch:8:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/AppBasic.h:27:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/App.h:27:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/Renderer.h:32:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:23:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:38:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFBase.h:68:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/MacTypes.h:90:17: note: expanded from macro 'nil'
    #define nil NULL
                ^
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:1:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/SpiritTest_Prefix.pch:6:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/Cinder.h:92:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/chrono:280:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/type_traits:203:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/cstddef:44:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/include/stddef.h:72:18: note: expanded from macro 'NULL'
#    define NULL __null
                 ^
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:9:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.h:12:
In file included from ../../../Cinder/boost/boost/spirit/include/qi.hpp:16:
In file included from ../../../Cinder/boost/boost/spirit/home/qi.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/action.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/action/action.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/qi/meta_compiler.hpp:14:
In file included from ../../../Cinder/boost/boost/spirit/home/support/meta_compiler.hpp:19:
In file included from ../../../Cinder/boost/boost/proto/proto.hpp:12:
In file included from ../../../Cinder/boost/boost/proto/core.hpp:21:
In file included from ../../../Cinder/boost/boost/proto/fusion.hpp:22:
In file included from ../../../Cinder/boost/boost/fusion/include/intrinsic.hpp:10:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/back.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/end.hpp:17:
In file included from ../../../Cinder/boost/boost/fusion/sequence/intrinsic/detail/segmented_end.hpp:11:
In file included from ../../../Cinder/boost/boost/fusion/iterator/segmented_iterator.hpp:10:
In file included from ../../../Cinder/boost/boost/fusion/iterator/detail/segmented_iterator.hpp:18:
../../../Cinder/boost/boost/fusion/iterator/detail/segmented_equal_to.hpp:16:5: error: declaration of anonymous struct must be a definition
    struct nil;
    ^
../../../Cinder/boost/boost/fusion/iterator/detail/segmented_equal_to.hpp:16:5: warning: declaration does not declare anything [-Wmissing-declarations]
    struct nil;
    ^~~~~~
../../../Cinder/boost/boost/fusion/iterator/detail/segmented_equal_to.hpp:35:43: error: expected unqualified-id
        struct segmented_equal_to<fusion::nil, fusion::nil>
                                          ^
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/Syntax.cpp:1:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/SpiritTest_Prefix.pch:8:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/AppBasic.h:27:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/App.h:27:
In file included from /Users/timmb/Documents/Programming/demos/SpiritTest/xcode/../../../Cinder/include/cinder/app/Renderer.h:32:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/ApplicationServices.framework/Headers/ApplicationServices.h:23:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:19:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:38:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFBase.h:68:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/MacTypes.h:90:17: note: expanded from macro 'nil'
    #define nil NULL
谁能指出我做错了什么吗?

(顺便说一下，由于外部库的需求，我使用Boost 1.53)

看来你少了一些

  • 包含(对于语义操作)

    #include <boost/spirit/include/phoenix.hpp>

  • 命名空间别名

    namespace ascii = boost::spirit::ascii;

  • 使用语句/限定符

        using qi::_val;
    using qi::_1;
    using qi::_2;

查看Live On Coliru

还要注意[_val = _1]是冗余的(自动属性传播实现相同)。

#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>
namespace qi = boost::spirit::qi;
namespace ascii = boost::spirit::ascii;
template <typename Iterator>
struct ExpressionGrammer : qi::grammar<Iterator, double(), ascii::space_type>
{
    qi::rule<Iterator, double(), ascii::space_type> expression;
    qi::rule<Iterator, double(), ascii::space_type> addsub;
    ExpressionGrammer()
    : ExpressionGrammer::base_type(expression)
    {
        using qi::lit;
        using qi::_val;
        using qi::_1;
        using qi::_2;
        addsub = (expression >> '+' >> expression)[_val = _1 + _2];     
        expression = (addsub | qi::double_)[_val = _1];
    }
};
int main()
{
    ExpressionGrammer<char*> g;
}
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