cpp_macromap_utils.hpp

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{
    using namespace boost::wave;

// strip leading whitespace
    if (replacement_list.size() > 0) {
    typename ContainerT::iterator end = replacement_list.end();
    typename ContainerT::iterator it = replacement_list.begin();
    
        while (it != end && IS_CATEGORY(*it, WhiteSpaceTokenType)) { 
            if (T_PLACEHOLDER != token_id(*it)) {
                typename ContainerT::iterator next = it;
                ++next;
                replacement_list.erase(it);
                it = next;
            }
            else {
                ++it;
            }
        }
    }
        
// strip trailing whitespace
    if (replacement_list.size() > 0) {
    typename ContainerT::reverse_iterator rend = replacement_list.rend();
    typename ContainerT::reverse_iterator rit = replacement_list.rbegin();
    
        while (rit != rend && IS_CATEGORY(*rit, WhiteSpaceTokenType)) 
            ++rit;

    typename ContainerT::iterator end = replacement_list.end();
    typename ContainerT::iterator it = rit.base();
    
        while (it != end && IS_CATEGORY(*it, WhiteSpaceTokenType)) { 
            if (T_PLACEHOLDER != token_id(*it)) {
                typename ContainerT::iterator next = it;
                ++next;
                replacement_list.erase(it);
                it = next;
            }
            else {
                ++it;
            }
        }
    }
}

///////////////////////////////////////////////////////////////////////////////
//
//  Remove all placeholder tokens from the given token sequence
//
///////////////////////////////////////////////////////////////////////////////
template <typename ContainerT>
inline void
remove_placeholders (ContainerT &replacement_list)
{
    using namespace boost::wave;

// strip leading whitespace
    if (replacement_list.size() > 0) {
    typename ContainerT::iterator end = replacement_list.end();
    typename ContainerT::iterator it = replacement_list.begin();
    
        while (it != end) {
            if (T_PLACEHOLDER == token_id(*it)) {
                typename ContainerT::iterator next = it;
                ++next;
                replacement_list.erase(it);
                it = next;
            }
            else {
                ++it;
            }
        }
        
    // remove all 'new' leading and trailing whitespace 
        trim_replacement_list(replacement_list);
    }
}

///////////////////////////////////////////////////////////////////////////////
//
//  Remove all whitespace tokens on the left side of the given token sequence
//
///////////////////////////////////////////////////////////////////////////////
template <typename ContainerT>
inline void
trim_sequence_left (ContainerT &argument)
{
    using namespace boost::wave;
    
// strip leading whitespace (should be only one token)
    if (argument.size() > 0 &&
        IS_CATEGORY(argument.front(), WhiteSpaceTokenType))
    {
        argument.pop_front();
    }
}
    
///////////////////////////////////////////////////////////////////////////////
//
//  Remove all whitespace tokens on the right side of the given token sequence
//
///////////////////////////////////////////////////////////////////////////////
template <typename ContainerT>
inline void
trim_sequence_right (ContainerT &argument)
{
    using namespace boost::wave;
    
// strip trailing whitespace (should be only one token)
    if (argument.size() > 0 &&
        IS_CATEGORY(argument.back(), WhiteSpaceTokenType))
    {
        argument.pop_back();
    }
}

///////////////////////////////////////////////////////////////////////////////
//
//  Remove all whitespace tokens on the left and right sides of the given token 
//  sequence
//
///////////////////////////////////////////////////////////////////////////////
template <typename ContainerT>
inline void
trim_sequence (ContainerT &argument)
{
    trim_sequence_left(argument);
    trim_sequence_right(argument);
}

///////////////////////////////////////////////////////////////////////////////
//
//  Tests, whether the given token sequence consists out of whitespace only
//
///////////////////////////////////////////////////////////////////////////////
template <typename ContainerT>
inline bool
is_whitespace_only (ContainerT const &argument)
{
    typename ContainerT::const_iterator end = argument.end();
    for (typename ContainerT::const_iterator it = argument.begin();
          it != end; ++it)
    {
        if (!IS_CATEGORY(*it, WhiteSpaceTokenType))
            return false;
    }
    return true;
}

///////////////////////////////////////////////////////////////////////////////
//
//  Skip forward to a given token
//
///////////////////////////////////////////////////////////////////////////////
template <typename IteratorT>
inline bool 
skip_to_token(IteratorT &it, IteratorT const &end, token_id id, 
    bool& seen_newline)
{
    using namespace boost::wave;
    if (token_id(*it) == id) 
        return true;
    if (++it == end) 
        return false;

    while (IS_CATEGORY(*it, WhiteSpaceTokenType) || 
           T_NEWLINE == token_id(*it)) 
    {
        if (T_NEWLINE == token_id(*it))
            seen_newline = true;
        if (++it == end)
            return false;
    }
    return token_id(*it) == id;
}

///////////////////////////////////////////////////////////////////////////////
//
//  Get the full name of a given macro name (concatenate the string 
//  representations of the single tokens).
//
///////////////////////////////////////////////////////////////////////////////
template <typename IteratorT>
inline std::string
get_full_name(IteratorT const &begin, IteratorT const &end)
{
    std::string full_name;
    for (IteratorT err_it = begin; err_it != end; ++err_it) 
        full_name += (*err_it).get_value().c_str();

    return full_name;
}

///////////////////////////////////////////////////////////////////////////////
//
//  The following predicate is used in conjunction with the remove_copy_if
//  algorithm to allow the detection of an eventually copied operator ##.
//  No removal is performed in any case.
//
///////////////////////////////////////////////////////////////////////////////
class find_concat_operator {
public:
    find_concat_operator(bool &found_) : found_concat(found_) {}
    
    template <typename TokenT>
    bool operator()(TokenT const &tok)
    {
        using namespace boost::wave;
        if (T_POUND_POUND == BASE_TOKEN(token_id(tok)))
            found_concat = true;
        return false;
    }

private:
    bool &found_concat;
};

///////////////////////////////////////////////////////////////////////////////
//  Convert a string of an arbitrary string compatible type to a internal 
//  string (BOOST_WAVE_STRING)
template <typename Target, typename Src>
struct to_string_helper
{
    typedef Target type;
    
    static Target call(Src const& str)
    {
        return Target(str.c_str());
    }
};

// do nothing if types are equal
template <typename Src>
struct to_string_helper<Src, Src>
{
    typedef Src const& type;

    static Src const& call(Src const& str)
    {
        return str;
    }
};

template <typename Target>
struct to_string_helper<Target, char const*>
{
    typedef Target type;

    static Target call(char const* str)
    {
        return Target(str);
    }
};

///////////////////////////////////////////////////////////////////////////////
}   // namespace impl

template <typename Target, typename Src>
inline typename impl::to_string_helper<Target, Src>::type
to_string(Src const& src)
{
    return impl::to_string_helper<Target, Src>::call(src);
}

///////////////////////////////////////////////////////////////////////////////
}   // namespace util
}   // namespace wave
}   // namespace boost

// the suffix header occurs after all of the code
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_SUFFIX
#endif

#endif // !defined(CPP_MACROMAP_UTIL_HPP_HK041119)