tests.cpp

boost库提供标准的C++ API 配合dev c++使用,功能更加强大

/*
 *
 * Copyright (c) 1998-2002
 * Dr John Maddock
 *
 * Use, modification and distribution are subject to the
 * Boost Software License, Version 1.0. (See accompanying file
 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 *
 */

 /*
  *
  *   FILE     tests.cpp
  *   VERSION  see <boost/version.hpp>
  *
  * the actual tests conducted by regress.
  *
  */

#include <cassert>
#include <boost/regex.hpp>
#include "regress.h"

#ifndef BOOST_REGEX_NO_TEST

# ifdef BOOST_MSVC
#  pragma warning(disable: 4244 4267)
#endif

using namespace boost;

template <class M1, class M2>
bool compare_result(const M1& sm, const M2& m)
{
   if(sm.size() != m.size())
      return false;
#ifdef BOOST_REGEX_V3
   if(sm.line() != m.line())
      return false;
#endif
   for(unsigned int i = 0; i < sm.size(); ++i)
   {
      if(sm.position(i) != m.position(i))
         return false;
      if(sm.length(i) != m.length(i))
         return false;
   }
   return true;
}

template <class M1>
bool compare_result(const M1& sm, const M1& m)
{
   return sm == m;
}


template <class C, class T, class A>
void cpp_eh_tests(const basic_regex<C, T, A>& )
{
#ifndef __GNUC__
   bool thrown = false;
   // try set_expression form first:
#ifndef BOOST_NO_EXCEPTIONS
   try
   {
#endif
      A a;
      basic_regex<C, T, A> e(a);
      e.set_expression(expression.c_str(), flags[2] | regex::use_except);
#ifndef BOOST_NO_EXCEPTIONS
   }
   catch(const boost::bad_expression&)
   {
      thrown = true;
   }
   catch(...){}
   if(!thrown)
   {
      begin_error();
      cout << "Error: expected exception not thrown" << endl;
   }
#endif

   // now try constructor form:
   thrown = false;
#ifndef BOOST_NO_EXCEPTIONS
   try
#endif
   {
      A a;
      basic_regex<C, T, A> e(expression.c_str(), flags[2] | regex::use_except, a);
   }
#ifndef BOOST_NO_EXCEPTIONS
   catch(const boost::bad_expression&)
   {
      thrown = true;
   }
   catch(...){}
   if(!thrown)
   {
      begin_error();
      cout << "Error: expected exception not thrown" << endl;
   }
#endif
#endif
}

template <class iterator>
iterator find_last_line(iterator start, iterator end)
{
   iterator result = start;
   while(start != end)
   {
      if(*start == '\n')
      {
         ++start;
         result = start;
      }
      else
         ++start;
   }
   return result;
}

template <class iterator>
unsigned int count_lines(iterator start, iterator end)
{
   unsigned int result = 0;
   while(start != end)
   {
      if(*start == '\n')
         ++result;
      ++start;
   }
   return result;
}

template <class iterator, class Alloc>
class grep_test_predicate
{
   int match_id;
   iterator base, term;
   // rebind allocator to correct type:
#ifdef BOOST_REGEX_V3
   typedef Alloc alloc_type;
#else
   typedef typename detail::rebind_allocator<boost::sub_match<iterator>, Alloc>::type alloc_type;
#endif
public:
   grep_test_predicate(iterator i, iterator j) : base(i), term(j) { match_id = 0; }
   ~grep_test_predicate(){}
   bool operator()(const boost::match_results< iterator, alloc_type >& m);
};

template <class iterator, class Alloc>
bool grep_test_predicate<iterator, Alloc>::operator()(const boost::match_results< iterator, alloc_type >& m)
{
   std::ptrdiff_t start, end;
   start = m[0].first - base;
   end = m[0].second - base;
   if((matches[match_id] != start) || (matches[match_id + 1] != end))
   {
      begin_error();
      cout << "regex++ grep match error: found [" << start << "," << end << "] expected [" << matches[match_id] << "," << matches[match_id+1] << "]" << endl;
   }

   //
   // check $`:
   start = m[-1].first - base;
   end = m[-1].second - base;
   if(match_id &&
      ( (end != matches[match_id]) || (start != matches[match_id - 1]) )
   )
   {
      begin_error();
      cout << "regex++ grep error in $`: found [" << start << "," << end << "] expected [" << matches[match_id-1] << "," << matches[match_id] << "]" << endl;
   }
   else if((!match_id) && ((start != 0) || (end != matches[0])))
   {
      begin_error();
      cout << "regex++ grep error in $`: found [" << start << "," << end << "] expected [" << 0 << "," << matches[0] << "]" << endl;
   }

   //
   // check $':
   start = m[-2].first - base;
   end = m[-2].second - base;
   if((start != matches[match_id + 1]) || (end != (term-base)))
   {
      begin_error();
      cout << "regex++ grep error in $': found [" << start << "," << end << "] expected [" << matches[match_id + 1] << "," << (term-base) << "]" << endl;
   }

   //
   // now check line()
   /* don't check this, it's not supported in the new algorithm....
   start = m.line();
   end = count_lines(base, iterator(m[0].first)) + 1;
   if(start != end)
   {
      begin_error();
      cout << "regex++ grep error in line(): found " << start << " expected " << end << endl;
   }
   */
   //
   // now check line_start()
   /* don't check this, it's not supported in the new algorithm....
   start = m.line_start() - base;
   end = find_last_line(base, iterator(m[0].first)) - base;
   if(start != end)
   {
      begin_error();
      cout << "regex++ grep error in line_start(): found " << start << " expected " << end << endl;
   }
   */
   match_id += 2;
   return true;
}

template <class C, class T, class A>
void cpp_tests(const basic_regex<C, T, A>& e, bool recurse = true)
{
   typedef typename basic_regex<C, T, A>::allocator_type base_allocator_type;
#ifdef BOOST_REGEX_V3
   typedef base_allocator_type allocator_type;
#else
   typedef typename detail::rebind_allocator<boost::sub_match<debug_iterator<string_type::iterator> >, base_allocator_type>::type allocator_type;
#endif
   if(flags[4] & REG_MERGE)
   {
      //
      // test merge code:
      //
      string_type s;
      s = regex_merge(search_text, e, format_string.c_str(), static_cast<boost::match_flag_type>(flags[3]));
      if(s != merge_string)
      {
         begin_error();
         cout << "merge result mismatch: found \"" << make_narrow(s).c_str() << "\" expected \"" << make_narrow(merge_string.c_str()) << "\"" << endl;
      }
      return;
   }


   if(recurse)
   {
      // copy and assign test:
      basic_regex<C, T, A> e2(e);
      cpp_tests(e2, false);
      e2 = e;
      cpp_tests(e2, false);
      basic_regex<C, T, A> e3;
#ifndef BOOST_REGEX_V3
      e3.swap(e2);
      cpp_tests(e3, false);
#endif
   }

   if(e.error_code())
   {
      // verify that we don't expect expression to compile
      if(search_text != BOOST_RE_STR("!"))
      {
         begin_error();
         cout << "Expression did not compile using regex++ API" << endl;
      }
      else if((recurse) && ((flags[3] & match_partial) == 0))
         cpp_eh_tests(e);
   }
   else if(flags[4] & REG_GREP)
   {
      // try to do grep:
      debug_iterator<string_type::iterator> x(search_text.begin(), search_text.begin(), search_text.end());
      debug_iterator<string_type::iterator> y(search_text.end(), search_text.begin(), search_text.end());
      grep_test_predicate<debug_iterator<string_type::iterator>, allocator_type> oi(x, y);
      regex_grep(oi, x, y, e, static_cast<boost::match_flag_type>(flags[3]));
#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
      if(!recurse)
      {
         unsigned len = search_text.size();
         const std::basic_string<char_t>& s = search_text;
         grep_test_predicate<std::basic_string<char_t>::const_iterator, base_allocator_type> oi2(s.begin(), s.end());
         regex_grep(oi2, s, e, static_cast<boost::match_flag_type>(flags[3]));
         grep_test_predicate<const char_t*, base_allocator_type> oi3(s.c_str(), s.c_str()+s.size());
         regex_grep(oi3, s.c_str(), e, static_cast<boost::match_flag_type>(flags[3]));
         assert(s.size() == len);
         assert(s.end() - s.begin() == (std::basic_string<char_t>::difference_type)len);
      }
#endif
   }
   else
   {
      // try to find match
      match_results< debug_iterator<string_type::iterator>, allocator_type> m;
      debug_iterator<string_type::iterator> x(search_text.begin(), search_text.begin(), search_text.end());
      debug_iterator<string_type::iterator> y(search_text.end(), search_text.begin(), search_text.end());
      if(regex_search(x, y, m, e, static_cast<boost::match_flag_type>(flags[3])))
      {
         // special case for partial matches:
         if(flags[4] & REG_PARTIAL_MATCH)
         {
            if(m[0].matched)
            {
               begin_error();
               cout << "regex++ API result mismatch, found full match when partial match was expected: found ("
                        << (m[0].first - x) << "," <<
                        (m[0].second - x) << ")" << endl;
            }
            else if(((m[0].first - x) != matches[0]) || ((m[0].second - x) != matches[1]))
            {
               begin_error();
               cout << "regex++ API result mismatch in sub-expression " << 0 <<
                       ", found (" << (m[0].first - x) << "," <<
                       (m[0].second - x) << ") expected (" <<
                       matches[0] << "," << matches[1] << ")" << endl;
            }
            return; // don't bother testing anything else for partial matches
         }
         // match found compare what matched with what we expect:
         int j = 0;