int main (void) {
std::cout << "compare (0, 42) = " << compare (0, 42) << std::endl;
double* p = new double;
DebugDelete d;
d(p); //使用时, 可以自动推倒模板
int* ip = new int;
DebugDelete() (ip);
std::unique_ptr<int, DebugDelete> pi (new int, DebugDelete());
std::unique_ptr<std::string, DebugDelete> ps (new std::string, DebugDelete());
int ia[] = {9, 8, 7, 6, 5};
std::vector<long> vi = {5, 4, 3, 2, 1, 0};
std::deque<std::string> w = {"lady", "girl", "woman", "now"};
Blob<int> a1(std::begin(ia), std::end(ia));
Blob<int> a2(vi.begin(), vi.end());
Blob<std::string> a3(w.begin(), w.end());
std::cout << "int ia[] = ";
for (const auto i : ia) { std::cout << i << " "; }
std::cout << std::endl;
std::cout << "std::vector<long> vi = ";
for (const auto i : vi) { std::cout << i << " "; }
std::cout << std::endl;
std::cout << "std::list<const char*> w = ";
for (const auto i : w) { std::cout << i << " "; }
std::cout << std::endl;
return 0;
}
TextQuery::TextQuery(std::ifstream& ifs)
: input(new vector<string>, DebugDelete())
{
LineNo lineNo{0};
for (string line; std::getline(ifs, line); ++lineNo) {
input->push_back(line);
std::istringstream line_stream(line);
for (string text, word; line_stream >> text; word.clear()) {
// avoid read a word followed by punctuation(such as: word, )
std::remove_copy_if(text.begin(), text.end(),
std::back_inserter(word), ispunct);
// use reference avoid count of shared_ptr add.
auto& nos = result[word];
if (!nos) nos.reset(new std::set<LineNo>, DebugDelete());
nos->insert(lineNo);
}
}
}
QueryResult TextQuery::query(const string& str) const
{
// use static just allocate once.
static shared_ptr<std::set<LineNo>> nodate(new std::set<LineNo>,
DebugDelete());
auto found = result.find(str);
if (found == result.end())
return QueryResult(str, nodate, input);
else
return QueryResult(str, found->second, input);
}
void operator delete( void* mem )
{
DebugDelete( mem, false );
}
void operator delete[]( void* mem )
{
DebugDelete( mem, true );
}