我正在开发一个项目，其中我使用的词干库在 Visual Studio 2010 (Express) 上运行得非常好，但是当我尝试在 VC++ 6.0 中编译同一个项目时，它产生了错误。我修复了其中一些，但我被困在了一些。我猜与模板有关的东西......
出于某种原因，我需要在 VC 6.0 中执行此操作。
这是文件的完整代码：
/***************************************************************************
utilities.h - description
-------------------
begin : Sat Apr 26 2003
copyright : (C) 2003 by Blake Madden
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the BSD License. *
* *
***************************************************************************/
#ifndef __UTILITIES_H__
#define __UTILITIES_H__
#include <algorithm>
#include <functional>
#include <math.h>
#include <cassert>
#include <iterator>
#ifndef M_PI
#define M_PI 3.1415926535897932384626433832795
#endif
//returns the byte size of an array
#define size_of_array(x) (sizeof(x)/sizeof(x[0]))
inline double within_range(size_t start, size_t end, double value)
{
return ( (value >= start) && (value <= end) ) ? value :
(value < start) ? start :
(value > end) ? end : /*never reaches this branch*/ value;
}
inline float degrees_to_radians(const float degrees)
{ return degrees * (M_PI/static_cast<float>(180)); }
//Opposite side is the side going upwards of a right triangle
inline float calc_opposite_side(const float hypontenuse, const float angleInDegrees)
{
return (sin(degrees_to_radians(angleInDegrees)) * hypontenuse);
}
//Adjacent side is the side at the bottom of a right triangle
inline float calc_adjacent_side(const float hypontenuse, const float angleInDegrees)
{
return (cos(degrees_to_radians(angleInDegrees)) * hypontenuse);
}
//Function to see if a number is even
template<typename T>
inline bool is_even(T value)
{ return (value%2) == 0; }
//specialized version of is_even for floating point value types that need to be "floored" first
inline bool is_even(double value)
{ return (static_cast<long>(floor(abs(value)))%2) == 0; }
inline bool is_even(float value)
{ return (static_cast<long>(floor(abs(value)))%2) == 0; }
///integer rounding function
template<typename T>
inline double round(T x)
{ return (floor(x+0.5f)); }
//class that remembers its original value from constuction
template <typename T>
class backup_variable
{
public:
backup_variable(const T& value) : m_originalValue(value), m_value(value)
{}
void operator=(const T& value)
{ m_value = value; }
bool operator==(const T& value) const
{ return m_value == value; }
bool operator<(const T& value) const
{ return m_value < value; }
bool operator<=(const T& value) const
{ return m_value <= value; }
bool operator>(const T& value) const
{ return m_value > value; }
bool operator>=(const T& value) const
{ return m_value >= value; }
void operator+(const T& value)
{ m_value + value; }
void operator+=(const T& value)
{ m_value += value; }
void operator-(const T& value)
{ m_value - value; }
void operator-=(const T& value)
{ m_value -= value; }
operator const T() const
{ return m_value; }
T* operator&()
{ return &m_value; }
T get_value() const
{ return m_value; }
bool has_changed() const
{ return m_value != m_originalValue; }
private:
T m_originalValue;
T m_value;
};
template<typename T>
inline bool is_either(T value, T first, T second)
{
return (value == first || value == second);
}
template<typename T>
inline bool is_neither(T value, T first, T second)
{
assert(first != second);
return (value != first && value != second);
}
template<typename T>
inline bool is_within(T value, T first, T second)
{
assert(first <= second);
return (value >= first && value <= second);
}
/*calls a member function of elements in a container for each
elelement in another container*/
template<typename inT, typename outT, typename member_extract_functorT>
inline outT copy_member(inT begin, inT end, outT dest, member_extract_functorT get_value)
{
for (; begin != end; ++dest, ++begin)
*dest = get_value(*begin);
return (dest);
}
template<typename inT, typename outT,
typename _Pr,
typename member_extract_functorT>
inline outT copy_member_if(inT begin, inT end, outT dest,
_Pr meets_criteria,
member_extract_functorT get_value)
{
for (; begin != end; ++begin)
{
if (meets_criteria(*begin))
{
*dest = get_value(*begin);
++dest;
}
}
return (dest);
}
template<typename _InIt, typename _Pr, typename member_extract_functorT>
inline typename std::iterator_traits<_InIt>::difference_type
count_member_if(_InIt _First, _InIt _Last,
_Pr _Pred, member_extract_functorT get_value)
{
//count elements satisfying _Pred
typename std::iterator_traits<_InIt>::difference_type _Count = 0;
for (; _First != _Last; ++_First)
if (_Pred(get_value(*_First)) )
++_Count;
return (_Count);
}
//determines if number is even
template <typename T>
class even : public std::unary_function<T, bool>
{
public:
inline bool operator()(const T& val) const
{ return val%2==0; }
};
//determines if a value is within a given range
template<typename T>
class within : public std::unary_function<T, bool>
{
public:
within(T range_begin, T range_end)
: m_range_begin(range_begin), m_range_end(range_end)
{}
inline bool operator()(T value) const
{ return (value >= m_range_begin && value <= m_range_end); }
private:
T m_range_begin;
T m_range_end;
};
#endif //__UTILITIES_H__
这是错误列表：
Compiling...
main.cpp
c:\[path]\utilities.h(158) : error C2039: 'difference_type' : is not a member of 'iterator_traits<_It>'
c:\[path]\utilities.h(158) : error C2146: syntax error : missing ';' before identifier 'count_member_if'
c:\[path]\utilities.h(158) : error C2433: 'difference_type' : 'inline' not permitted on data declarations
c:\[path]\utilities.h(158) : error C2501: 'difference_type' : missing storage-class or type specifiers
c:\[path]\utilities.h(158) : error C2059: syntax error : ';'
c:\[path]\utilities.h(158) : error C2065: '_InIt' : undeclared identifier
c:\[path]\utilities.h(158) : error C2146: syntax error : missing ')' before identifier '_First'
c:\[path]\utilities.h(158) : error C2501: 'count_member_if' : missing storage-class or type specifiers
c:\[path]\utilities.h(159) : error C2059: syntax error : ')'
c:\[path]\utilities.h(180) : error C2954: template definitions cannot nest
c:\[path]\utilities.h(185) : error C2065: 'm_range_begin' : undeclared identifier
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(185) : error C2065: 'range_begin' : undeclared identifier
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(185) : error C2461: 'within<T>' : constructor syntax missing formal parameters
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(185) : error C2061: syntax error : identifier 'range_end'
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(186) : error C2143: syntax error : missing ';' before '{'
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(186) : error C2334: unexpected token(s) preceding '{'; skipping apparent function body
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(188) : error C2059: syntax error : 'return'
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(188) : error C2238: unexpected token(s) preceding ';'
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
c:\[path]\utilities.h(189) : error C2143: syntax error : missing ';' before 'private'
c:\[path]\utilities.h(192) : see reference to class template instantiation 'within<T>' being compiled
我会感谢任何帮助/线索。