精神不能自动分配属性单元素结构（或融合序列） [英] Spirit unable to assign attribute to single-element struct (or fusion sequence)
本文介绍了精神不能自动分配属性单元素结构（或融合序列）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的目标是有我的齐::语法返回属性。我有一个精神做这显著困难::词法虽然。
我期望与下面给定的语法，如果我把它叫做精神::气::解析（开始，结束，语法，输出）; ，该结构的ident输出将有语义分析的内容。
的错误似乎大多流出来这行：启动（％）= lexer.identifier;
系统注
- 升压1.47.0
- 的Mac OS X 10.7.2
- 铛++或g ++（如下图所示的错误是从铛++）
编译命令
G ++ -g -c -O0 -Wall -DBOOST_SPIRIT_DEBUG -DBOOST_SPIRIT_LEXERTL_DEBUG -DBOOST_SPIRIT_USE_PHOENIX_V3 -DBOOST_SPIRIT_ACTIONS_ALLOW_ATTR_COMPAT reduced.cpp
来源$ C $ C
的#include＆LT;升压/融合/有/ adapt_struct.hpp＆GT;＃包括LT＆;升压/精神/家庭/ lex.hpp＆GT;
＃包括LT＆;升压/精神的/ home /法/词法/ lexertl / lexer.hpp＆GT;
＃包括LT＆;升压/精神/家庭/ qi.hpp＆GT;命名空间的精神=提振精神::;结构IDENT {
性病::字符串值;
};BOOST_FUSION_ADAPT_STRUCT（IDENT，
（标准::字符串，值）
）结构my_lexer：精神:: ::法词法＆LT;精神:: ::法:: lexertl＆actor_lexer LT;＆GT; ＆GT; {
精神:: ::法与token_def LT;标准::字符串＆GT;标识符;
};结构my_grammar：精神::补气::语法＆LT; my_lexer :: iterator_type，IDENT（）＆GT; {
my_grammar（常量my_lexer＆安培;词法分析器）：my_grammar :: base_type（开始）{
启动（％）= lexer.identifier;
} 精神::齐::规则＆LT; my_lexer :: iterator_type，IDENT（）＆GT;开始;
};
2的错误报道
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:38:24：错误：没有匹配的构造函数'的ident'的初始化
ATTR =属性（第一个，最后一个）;
^ ~~~~~~~~~~~
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:94:13：注意：在成员函数'的boost ::精神特质:: :: assign_to_attribute_from_iterators＆LT的实例; IDENT，字符常量*
无效＆GT; ::通话这里要求
致电（第一，最后，attr）使用;
^
在文件从../reduced-example/reduced.cpp:4包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/lexer.hpp:20包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/token.hpp:530:13：注意：在函数模板专业化的实例化的boost ::精神::性状： ：assign_to＆LT;字符常量*，IDENT＆GT;'
这里要求
精神::特点:: assign_to（t.value（）开始（），t.value（）结束（），ATTR）;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:330:59：注意：在成员函数的实例化的boost ::精神特质:: :: assign_to_attribute_from_value＆LT; IDENT，
提振::精神::法:: lexertl ::令牌LT;字符常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中无效＆GT; ::通话这里要求
assign_to_attribute_from_value＆LT;属性，T＆GT; ::调用（VAL，attr）使用;
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:353:9：注意：在函数模板专业化实例
的boost ::精神特质:: ::详细:: assign_to＆LT;的boost ::精神:: ::法:: lexertl令牌LT;字符常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中mpl_ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中的ident＆GT;'这里要求
细节:: assign_to（VAL，ATTR，is_not_wrapped_container（））;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:106:21：注意：在函数模板专业化实例
的boost ::精神::特点:: assign_to＆LT;的boost ::精神::法:: lexertl ::令牌LT;字符常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆GT ;，无符号长＆gt;中的ident＆GT;'这里要求
精神::特点:: assign_to（T，attr）使用;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:21包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/reference.hpp:16包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/reference.hpp:43:20：注：（跳过在回溯5上下文;使用-ftemplate-回溯极限= 0查看所有）
返回ref.get（）解析（第一个，最后，背景，船长，attr）使用。
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:16包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/function.hpp:64包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/$p$pprocessor/iteration/detail/iter/forward1.hpp:67包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/function/detail/function_iterate.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/function/detail/maybe_include.hpp:33包括：
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1042:5：注意：在函数模板专业化的实例化的boost :: function4＆LT; BOOL，
boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中
lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT; ＆安培;， boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*
提高:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT 1为卤素; ＆GT; ＆GT;常量和放大器;,提振精神:: ::背景下＆;提高::融合::利弊＆LT;＆IDENT放大器;，
提高::融合::零＆gt;中的boost ::融合:: vector0＆LT;无效＆GT; ＆GT; ＆放;,提振精神:: :: unused_type常量
&>::function4<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>,字符型，无符号长＆GT;常量，无符号长＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT;'
这里要求
base_type（F）
^
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1083:5：注意：在函数模板特殊化'的boost ::功能和LT的实例;布尔
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中
lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT; ＆安培;， boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*
提高:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT 1为卤素; ＆GT; ＆GT;常量和放大器;,提振精神:: ::背景下＆;提高::融合::利弊＆LT;＆IDENT放大器;，
提高::融合::零＆gt;中的boost ::融合:: vector0＆LT;无效＆GT; ＆GT; ＆放;,提振精神:: :: unused_type常量
&)>::function<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>,字符型，无符号长＆GT;常量，无符号长＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT;'
这里要求
self_type（F）.swap（*此）;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:182:19：注意：在函数模板特殊化'的boost ::功能和LT的实例;布尔
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中
lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT; ＆安培;， boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*
提高:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT 1为卤素; ＆GT; ＆GT;常量和放大器;,提振精神:: ::背景下＆;提高::融合::利弊＆LT;＆IDENT放大器;，
提高::融合::零＆gt;中的boost ::融合:: vector0＆LT;无效＆GT; ＆GT; ＆放;,提振精神:: :: unused_type常量
&)>::operator=<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>,字符型，无符号长＆GT;常量，无符号长＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT;'
这里要求
lhs.f =细节:: bind_parser＆LT;自动＆GT;（
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:230:13：注意：在函数模板专业化实例
'boost::spirit::qi::rule<boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中无符号
长＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆gt;中IDENT（）的boost ::精神:: unused_type，提振精神:: :: unused_type，提振精神:: :: unused_type＆GT; ::定义＆LT; MPL _ :: bool_＆LT; 1＆gt;中
提振精神:: :: ::法与token_def LT;的std :: basic_string的＆LT;焦炭＆gt;中焦，无符号长＆GT; ＆GT;'这里要求
定义＆LT; MPL :: true_＆GT;（R，EXPR，特点::火柴＆LT;气虚::域，EXPR＆GT;（））;
^
../reduced-example/reduced.cpp:23:9：注意：在函数模板专业化的实例化的boost ::精神::齐::操作符％=＆LT;的boost ::精神:: ::法与token_def LT; STD :: basic_string的＆LT;焦炭＆gt;中焦，无符号长＆GT; ＆GT;'
这里要求
启动（％）= lexer.identifier;
^
../reduced-example/reduced.cpp:9:8：注意：候选构造函数（隐含的默认构造函数）不可行的：需要0参数，但提供了2
结构IDENT {
^
../reduced-example/reduced.cpp:9:8：注意：候选构造函数（隐式拷贝构造函数）不可行的：需要1个参数，但提供了2
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:17包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/parser.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/domain.hpp:18包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/context.hpp:18包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/nonterminal/expand_arg.hpp:20包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/string_traits.hpp:16包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/container.hpp:368:22：错误：没有成员名为'的ident''空'
返回c.empty（）;
〜^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/container.hpp:375:47：注意：在成员函数'的boost ::精神特质:: :: is_empty_container＆LT的实例; IDENT，无效＆GT; ::通话这里要求
返回is_empty_container＆LT;集装箱＆GT; ::调用（C）;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:37:17：注意：在函数模板专业化的实例化的boost ::精神特质:: :: is_empty＆LT ; IDENT＆GT;'这里要求
如果（::特质is_empty（attr）使用）
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:94:13：注意：在成员函数'的boost ::精神特质:: :: assign_to_attribute_from_iterators＆LT的实例; IDENT，字符常量*
无效＆GT; ::通话这里要求
致电（第一，最后，attr）使用;
^
在文件从../reduced-example/reduced.cpp:4包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/lexer.hpp:20包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/token.hpp:530:13：注意：在函数模板专业化的实例化的boost ::精神::性状： ：assign_to＆LT;字符常量*，IDENT＆GT;'
这里要求
精神::特点:: assign_to（t.value（）开始（），t.value（）结束（），ATTR）;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:330:59：注意：在成员函数的实例化的boost ::精神特质:: :: assign_to_attribute_from_value＆LT; IDENT，
提振::精神::法:: lexertl ::令牌LT;字符常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中无效＆GT; ::通话这里要求
assign_to_attribute_from_value＆LT;属性，T＆GT; ::调用（VAL，attr）使用;
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:353:9：注：（跳过在回溯7环境;使用-ftemplate-回溯极限= 0查看全部）
细节:: assign_to（VAL，ATTR，is_not_wrapped_container（））;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:16包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/function.hpp:64包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/$p$pprocessor/iteration/detail/iter/forward1.hpp:67包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/function/detail/function_iterate.hpp:14包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/function/detail/maybe_include.hpp:33包括：
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1042:5：注意：在函数模板专业化的实例化的boost :: function4＆LT; BOOL，
boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中
lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT; ＆安培;， boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*
提高:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT 1为卤素; ＆GT; ＆GT;常量和放大器;,提振精神:: ::背景下＆;提高::融合::利弊＆LT;＆IDENT放大器;，
提高::融合::零＆gt;中的boost ::融合:: vector0＆LT;无效＆GT; ＆GT; ＆放;,提振精神:: :: unused_type常量
&>::function4<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>,字符型，无符号长＆GT;常量，无符号长＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT;'
这里要求
base_type（F）
^
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1083:5：注意：在函数模板特殊化'的boost ::功能和LT的实例;布尔
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中
lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT; ＆安培;， boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*
提高:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT 1为卤素; ＆GT; ＆GT;常量和放大器;,提振精神:: ::背景下＆;提高::融合::利弊＆LT;＆IDENT放大器;，
提高::融合::零＆gt;中的boost ::融合:: vector0＆LT;无效＆GT; ＆GT; ＆放;,提振精神:: :: unused_type常量
&)>::function<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>,字符型，无符号长＆GT;常量，无符号长＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT;'
这里要求
self_type（F）.swap（*此）;
^
在文件从../reduced-example/reduced.cpp:3包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15包括：
在文件从/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18包括：
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:182:19：注意：在函数模板特殊化'的boost ::功能和LT的实例;布尔
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中
lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT; ＆安培;， boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*
提高:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中unsigned long类型＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT 1为卤素; ＆GT; ＆GT;常量和放大器;,提振精神:: ::背景下＆;提高::融合::利弊＆LT;＆IDENT放大器;，
提高::融合::零＆gt;中的boost ::融合:: vector0＆LT;无效＆GT; ＆GT; ＆放;,提振精神:: :: unused_type常量
&)>::operator=<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>,字符型，无符号长＆GT;常量，无符号长＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆GT;'
这里要求
lhs.f =细节:: bind_parser＆LT;自动＆GT;（
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:230:13：注意：在函数模板专业化实例
'boost::spirit::qi::rule<boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char常量*，提振:: MPL :: vector0＆LT; MPL _ ::呐＆gt;中MPL _ :: bool_＆LT; 1＆gt;中无符号
长＆gt;中lexertl ::详细::数据，字符常量*，MPL _ :: bool_＆LT; 1＆gt;中MPL _ :: bool_＆LT; 1 GT; ＆GT; ＆gt;中IDENT（）的boost ::精神:: unused_type，提振精神:: :: unused_type，提振精神:: :: unused_type＆GT; ::定义＆LT; MPL _ :: bool_＆LT; 1＆gt;中
提振精神:: :: ::法与token_def LT;的std :: basic_string的＆LT;焦炭＆gt;中焦，无符号长＆GT; ＆GT;'这里要求
定义＆LT; MPL :: true_＆GT;（R，EXPR，特点::火柴＆LT;气虚::域，EXPR＆GT;（））;
^
../reduced-example/reduced.cpp:23:9：注意：在函数模板专业化的实例化的boost ::精神::齐::操作符％=＆LT;的boost ::精神:: ::法与token_def LT; STD :: basic_string的＆LT;焦炭＆gt;中焦，无符号长＆GT; ＆GT;'
这里要求
启动（％）= lexer.identifier;
^
解决方案
我最终意识到，我所定义的结构是在精神上被用作一个元组。因为精神将尽量减少群体（比如，一个可选＆LT; INT，INT＆GT; 是可选＆LT; INT＆GT; ）。因此，我猜测，一个元组LT; A＆GT; 将被转换为 A 。这似乎是这种情况。
我能破code的测试用例进一步减少为以下内容：
的#include＆LT;升压/融合/有/ adapt_struct.hpp＆GT;
＃包括LT＆;升压/精神/家庭/ qi.hpp＆GT;
＃包括LT＆;串GT;结构IDENT {
性病::串;
};BOOST_FUSION_ADAPT_STRUCT（IDENT，
（标准::字符串，一）
）诠释主（）{
提振精神:: ::气::规则＆LT;为const char * IDENT（）＆GT; - [R;
R =的boost ::精神::语义[ABC];
}
从下面的邮件列表的帖子（的 1 ，<一个href=\"http://boost.2283326.n4.nabble.com/Spirit-Qi-Adapted-struct-with-single-std-string-member-gives-error-value-type-is-not-a-member-of-Strt-td2715434.html\"相对=nofollow> 2 ），我发现，我可以解决此问题做：
R =的boost ::精神::语义[ABC]＆GT;＆GT;提振精神:: :: EPS;
虽然算不上高雅，但它至少解决了这个问题。如果别人有做单一元素结构的方法，我会非常感兴趣，但。
My goal is to have my qi::grammar return an attribute. I'm having significant difficulty doing this with a spirit::lexer though.
I'd expect that with the given grammar below, if I called it with spirit::qi::parse(begin, end, grammar, output);, that the struct ident output would have the contents of the parsed lexeme.
The error seems to mostly flow out of this line: start %= lexer.identifier;
System Notes
- Boost 1.47.0
- Mac OS X 10.7.2
- clang++ or g++ (errors shown below are from clang++)
Compile Command
g++ -g -c -O0 -Wall -DBOOST_SPIRIT_DEBUG -DBOOST_SPIRIT_LEXERTL_DEBUG -DBOOST_SPIRIT_USE_PHOENIX_V3 -DBOOST_SPIRIT_ACTIONS_ALLOW_ATTR_COMPAT reduced.cpp
Source Code
#include <boost/fusion/include/adapt_struct.hpp>
#include <boost/spirit/home/lex.hpp>
#include <boost/spirit/home/lex/lexer/lexertl/lexer.hpp>
#include <boost/spirit/home/qi.hpp>
namespace spirit = boost::spirit;
struct ident {
std::string value;
};
BOOST_FUSION_ADAPT_STRUCT(ident,
(std::string, value)
)
struct my_lexer : spirit::lex::lexer< spirit::lex::lexertl::actor_lexer<> > {
spirit::lex::token_def<std::string> identifier;
};
struct my_grammar : spirit::qi::grammar<my_lexer::iterator_type, ident()> {
my_grammar(const my_lexer & lexer) : my_grammar::base_type(start) {
start %= lexer.identifier;
}
spirit::qi::rule<my_lexer::iterator_type, ident()> start;
};
2 Errors Reported
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:38:24: error: no matching constructor for initialization of 'ident'
attr = Attribute(first, last);
^ ~~~~~~~~~~~
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:94:13: note: in instantiation of member function 'boost::spirit::traits::assign_to_attribute_from_iterators<ident, char const *,
void>::call' requested here
call(first, last, attr);
^
In file included from ../reduced-example/reduced.cpp:4:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/lexer.hpp:20:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/token.hpp:530:13: note: in instantiation of function template specialization 'boost::spirit::traits::assign_to<char const *, ident>'
requested here
spirit::traits::assign_to(t.value().begin(), t.value().end(), attr);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:330:59: note: in instantiation of member function 'boost::spirit::traits::assign_to_attribute_from_value<ident,
boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, void>::call' requested here
assign_to_attribute_from_value<Attribute, T>::call(val, attr);
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:353:9: note: in instantiation of function template specialization
'boost::spirit::traits::detail::assign_to<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, ident>' requested here
detail::assign_to(val, attr, is_not_wrapped_container());
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:106:21: note: in instantiation of function template specialization
'boost::spirit::traits::assign_to<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, ident>' requested here
spirit::traits::assign_to(t, attr);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:21:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/reference.hpp:16:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/reference.hpp:43:20: note: (skipping 5 contexts in backtrace; use -ftemplate-backtrace-limit=0 to see all)
return ref.get().parse(first, last, context, skipper, attr);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:16:
In file included from /home/wlynch/Boost/1.47.0/include/boost/function.hpp:64:
In file included from /home/wlynch/Boost/1.47.0/include/boost/preprocessor/iteration/detail/iter/forward1.hpp:67:
In file included from /home/wlynch/Boost/1.47.0/include/boost/function/detail/function_iterate.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/function/detail/maybe_include.hpp:33:
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1042:5: note: in instantiation of function template specialization 'boost::function4<bool,
boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>,
lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > &, boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *,
boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > const &, boost::spirit::context<boost::fusion::cons<ident &,
boost::fusion::nil>, boost::fusion::vector0<void> > &, boost::spirit::unused_type const
&>::function4<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> const, unsigned long>, mpl_::bool_<1> > >'
requested here
base_type(f)
^
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1083:5: note: in instantiation of function template specialization 'boost::function<bool
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>,
lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > &, boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *,
boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > const &, boost::spirit::context<boost::fusion::cons<ident &,
boost::fusion::nil>, boost::fusion::vector0<void> > &, boost::spirit::unused_type const
&)>::function<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> const, unsigned long>, mpl_::bool_<1> > >'
requested here
self_type(f).swap(*this);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:182:19: note: in instantiation of function template specialization 'boost::function<bool
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>,
lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > &, boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *,
boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > const &, boost::spirit::context<boost::fusion::cons<ident &,
boost::fusion::nil>, boost::fusion::vector0<void> > &, boost::spirit::unused_type const
&)>::operator=<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> const, unsigned long>, mpl_::bool_<1> > >'
requested here
lhs.f = detail::bind_parser<Auto>(
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:230:13: note: in instantiation of function template specialization
'boost::spirit::qi::rule<boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned
long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > >, ident (), boost::spirit::unused_type, boost::spirit::unused_type, boost::spirit::unused_type>::define<mpl_::bool_<1>,
boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> >' requested here
define<mpl::true_>(r, expr, traits::matches<qi::domain, Expr>());
^
../reduced-example/reduced.cpp:23:9: note: in instantiation of function template specialization 'boost::spirit::qi::operator%=<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> >'
requested here
start %= lexer.identifier;
^
../reduced-example/reduced.cpp:9:8: note: candidate constructor (the implicit default constructor) not viable: requires 0 arguments, but 2 were provided
struct ident {
^
../reduced-example/reduced.cpp:9:8: note: candidate constructor (the implicit copy constructor) not viable: requires 1 argument, but 2 were provided
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:17:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/parser.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/domain.hpp:18:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/context.hpp:18:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/nonterminal/expand_arg.hpp:20:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/string_traits.hpp:16:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/container.hpp:368:22: error: no member named 'empty' in 'ident'
return c.empty();
~ ^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/support/container.hpp:375:47: note: in instantiation of member function 'boost::spirit::traits::is_empty_container<ident, void>::call' requested here
return is_empty_container<Container>::call(c);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:37:17: note: in instantiation of function template specialization 'boost::spirit::traits::is_empty<ident>' requested here
if (traits::is_empty(attr))
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:94:13: note: in instantiation of member function 'boost::spirit::traits::assign_to_attribute_from_iterators<ident, char const *,
void>::call' requested here
call(first, last, attr);
^
In file included from ../reduced-example/reduced.cpp:4:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/lexer.hpp:20:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/lexertl/token.hpp:530:13: note: in instantiation of function template specialization 'boost::spirit::traits::assign_to<char const *, ident>'
requested here
spirit::traits::assign_to(t.value().begin(), t.value().end(), attr);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:13:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/lexer/token_def.hpp:20:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:330:59: note: in instantiation of member function 'boost::spirit::traits::assign_to_attribute_from_value<ident,
boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, void>::call' requested here
assign_to_attribute_from_value<Attribute, T>::call(val, attr);
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/detail/assign_to.hpp:353:9: note: (skipping 7 contexts in backtrace; use -ftemplate-backtrace-limit=0 to see all)
detail::assign_to(val, attr, is_not_wrapped_container());
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:16:
In file included from /home/wlynch/Boost/1.47.0/include/boost/function.hpp:64:
In file included from /home/wlynch/Boost/1.47.0/include/boost/preprocessor/iteration/detail/iter/forward1.hpp:67:
In file included from /home/wlynch/Boost/1.47.0/include/boost/function/detail/function_iterate.hpp:14:
In file included from /home/wlynch/Boost/1.47.0/include/boost/function/detail/maybe_include.hpp:33:
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1042:5: note: in instantiation of function template specialization 'boost::function4<bool,
boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>,
lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > &, boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *,
boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > const &, boost::spirit::context<boost::fusion::cons<ident &,
boost::fusion::nil>, boost::fusion::vector0<void> > &, boost::spirit::unused_type const
&>::function4<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> const, unsigned long>, mpl_::bool_<1> > >'
requested here
base_type(f)
^
/home/wlynch/Boost/1.47.0/include/boost/function/function_template.hpp:1083:5: note: in instantiation of function template specialization 'boost::function<bool
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>,
lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > &, boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *,
boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > const &, boost::spirit::context<boost::fusion::cons<ident &,
boost::fusion::nil>, boost::fusion::vector0<void> > &, boost::spirit::unused_type const
&)>::function<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> const, unsigned long>, mpl_::bool_<1> > >'
requested here
self_type(f).swap(*this);
^
In file included from ../reduced-example/reduced.cpp:3:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/lex/tokenize_and_parse.hpp:15:
In file included from /home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/grammar.hpp:18:
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:182:19: note: in instantiation of function template specialization 'boost::function<bool
(boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>,
lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > &, boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *,
boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > > const &, boost::spirit::context<boost::fusion::cons<ident &,
boost::fusion::nil>, boost::fusion::vector0<void> > &, boost::spirit::unused_type const
&)>::operator=<boost::spirit::qi::detail::parser_binder<boost::spirit::lex::reference<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> const, unsigned long>, mpl_::bool_<1> > >'
requested here
lhs.f = detail::bind_parser<Auto>(
^
/home/wlynch/Boost/1.47.0/include/boost/spirit/home/qi/nonterminal/rule.hpp:230:13: note: in instantiation of function template specialization
'boost::spirit::qi::rule<boost::spirit::lex::lexertl::iterator<boost::spirit::lex::lexertl::functor<boost::spirit::lex::lexertl::token<char const *, boost::mpl::vector0<mpl_::na>, mpl_::bool_<1>, unsigned
long>, lexertl::detail::data, char const *, mpl_::bool_<1>, mpl_::bool_<1> > >, ident (), boost::spirit::unused_type, boost::spirit::unused_type, boost::spirit::unused_type>::define<mpl_::bool_<1>,
boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> >' requested here
define<mpl::true_>(r, expr, traits::matches<qi::domain, Expr>());
^
../reduced-example/reduced.cpp:23:9: note: in instantiation of function template specialization 'boost::spirit::qi::operator%=<boost::spirit::lex::token_def<std::basic_string<char>, char, unsigned long> >'
requested here
start %= lexer.identifier;
^
解决方案
I ended up realizing that the struct I defined is being used in spirit as a tuple. Because spirit will try to minimize the groups (like, an optional<int, int> is an optional<int>). Therefore, I guessed that a tuple<A> will be converted to an A. Which seems to be the case.
I was able to further reduce the test case of broken code to the following:
#include <boost/fusion/include/adapt_struct.hpp>
#include <boost/spirit/home/qi.hpp>
#include <string>
struct ident {
std::string a;
};
BOOST_FUSION_ADAPT_STRUCT(ident,
(std::string, a)
)
int main() {
boost::spirit::qi::rule<const char*, ident()> r;
r = boost::spirit::lexeme["abc"];
}
From the following mailing list postings (1, 2) that I found, I can work around this issue by doing:
r = boost::spirit::lexeme["abc"] >> boost::spirit::eps;
While not really elegant, it solves the problem at least. If someone else has a method to do the single element struct, I'd be greatly interested though.
这篇关于精神不能自动分配属性单元素结构（或融合序列）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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