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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef __COUNTING_PREDICATES_H
#define __COUNTING_PREDICATES_H
template <typename Predicate>
struct unary_counting_predicate {
public:
unary_counting_predicate(Predicate p) : p_(p), count_(0) {}
~unary_counting_predicate() {}
typedef typename Predicate::argument_type argument_type;
typedef bool result_type;
bool operator () (const argument_type &a) const { ++count_; return p_(a); }
size_t count() const { return count_; }
void reset() { count_ = 0; }
private:
Predicate p_;
mutable size_t count_;
};
template <typename Predicate, typename Arg1, typename Arg2=Arg1>
struct binary_counting_predicate : public std::binary_function<Arg1, Arg2, bool> {
public:
binary_counting_predicate ( Predicate p ) : p_(p), count_(0) {}
~binary_counting_predicate() {}
bool operator () (const Arg1 &a1, const Arg2 &a2) const { ++count_; return p_(a1, a2); }
size_t count() const { return count_; }
void reset() { count_ = 0; }
private:
Predicate p_;
mutable size_t count_;
};
#endif // __COUNTING_PREDICATES_H
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