我是错误“LNK1179：无效或损坏的文件：重复的 COMDAT”的受害者，这些 消息来源让我相信，不使用phoenix我可以避免这个错误。
（这是我上一个问题的后续。）我想boost::phoenix用别的东西代替。也许boost::bind吧，但我不知道如何让它访问karma::_val.
以下代码无法在 VC9 上编译
错误 C2825：“F”：后跟“::”时必须是类或命名空间
#include <boost/config/warning_disable.hpp>
#include <boost/foreach.hpp>
#include <boost/assign/list_of.hpp>
#include <boost/range/adaptors.hpp>
#include <boost/range/algorithm.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/karma.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include <boost/bind.hpp>
#include <iostream>
#include <string>
#include <list>
namespace karma = boost::spirit::karma;
namespace spirit = boost::spirit;
namespace ascii = boost::spirit::ascii;
namespace phoenix = boost::phoenix;
class Item
{
public:
typedef std::vector<int> Values;
Item(const std::string & i, const Values & v) : m_id(i), m_values(v) {}
std::string getId() const { return m_id; }
const Values & getValues() const { return m_values; }
private:
std::string m_id;
Values m_values;
};
class ItemList
{
public:
typedef std::map<std::string, Item> Items;
ItemList() {}
ItemList(const Items & s, const Items & o) : m_some(s), m_other(o) {}
const Items getSome() const { return m_some; }
const Items getOther() const { return m_other; }
private:
Items m_some;;
Items m_other;
};
template <typename Iterator>
struct list_generator : karma::grammar<Iterator, ItemList()>
{
list_generator(const ItemList & i)
: list_generator::base_type(start)
{
using karma::int_;
using karma::_1;
using karma::lit;
using karma::_val;
// using phoenix causes: fatal error LNK1179: invalid or corrupt file: duplicate COMDAT '?value@?$result_@U?$member_variable@$$A6E?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZP8Item@@AE?AV12@XZ@detail@phoenix@boost@@@?$is_mem_fun_pointer_select@$0A@@detail@boost@@2_NB'
// this is probably because the symbol names are too long.
// Convert maps into lists containing only the values
const Items some = boost::copy_range<Items>(i.getSome() | boost::adaptors::map_values);
const Items other = boost::copy_range<Items>(i.getOther() | boost::adaptors::map_values);
id =
lit("<id>")
<< karma::string
<< lit("</id>");
values =
lit("<values>")
<< (int_ % ';')
<< lit("</values>");
item =
lit("<item>")
//<< id[_1 = phoenix::bind(&Item::getId, _val)]
<< id[boost::bind(&Item::getId, &_val, _1)] // !! error C2825 !!
<< values[_1 = phoenix::bind(&Item::getValues, _val)]
<< lit("</item>");
start =
lit("<some>") << (*item)[_1 = some] << lit("</some>")
<< lit("<other>") << (*item)[_1 = other] << lit("</other>");
}
typedef std::vector<Item> Items;
karma::rule<Iterator, std::string()> id;
karma::rule<Iterator, Item::Values()> values;
karma::rule<Iterator, Item()> item;
karma::rule<Iterator, ItemList()> start;
};
int main()
{
const Item::Values values = boost::assign::list_of(1)(2)(3);
const Item a("a", values);
const Item b("b", values);
ItemList::Items some, other;
some.insert(std::make_pair(a.getId(), a));
other.insert(std::make_pair(b.getId(), b));
const ItemList items(some, ItemList::Items());
typedef std::back_insert_iterator<std::string> Iter;
typedef list_generator<Iter> Generator;
Generator grammar(items);
std::string generated;
Iter sink(generated);
if (!karma::generate(sink, grammar))
{
std::cout << "Generating failed\n";
}
else
{
std::cout << "Generated: " << generated << "\n";
}
return 0;
}
完整的错误是这样的：
error C2825: 'F': must be a class or namespace when followed by '::'
1> c:\path\to\boost\boost/bind/bind_template.hpp(15) : see reference to class template instantiation 'boost::_bi::result_traits<R,F>' being compiled
1> with
1> [
1> R=boost::_bi::unspecified,
1> F=std::basic_string<char,std::char_traits<char>,std::allocator<char>> (__thiscall Item::* )(void) const
1> ]
1> .\spiritTest.cpp(85) : see reference to class template instantiation 'boost::_bi::bind_t<R,F,L>' being compiled
1> with
1> [
1> R=boost::_bi::unspecified,
1> F=std::string (__thiscall Item::* )(void) const,
1> L=boost::_bi::list2<boost::_bi::value<boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::reference_eval,boost::fusion::vector<boost::spirit::attribute<0>,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_,boost::fusion::void_>>>>,boost::_bi::value<boost::spirit::_1_type>>
1> ]
1> .\spiritTest.cpp(57) : while compiling class template member function 'list_generator<Iterator>::list_generator(const ItemList &)'
1> with
1> [
1> Iterator=Iter
1> ]
1> .\spiritTest.cpp(116) : see reference to class template instantiation 'list_generator<Iterator>' being compiled
1> with
1> [
1> Iterator=Iter
1> ]