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// Range v3 library
//
// Copyright Eric Niebler 2014-present
//
// Use, modification and distribution is 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)
#ifndef RANGES_SIMPLE_TEST_HPP
#define RANGES_SIMPLE_TEST_HPP
#include <cstdlib>
#include <utility>
#include <iostream>
#include <range/v3/detail/config.hpp>
namespace test_impl
{
inline int &test_failures()
{
static int test_failures = 0;
return test_failures;
}
template<typename T>
struct streamable_base
{};
template<typename T>
std::ostream &operator<<(std::ostream &sout, streamable_base<T> const &)
{
return sout << "<non-streamable type>";
}
template<typename T>
struct streamable : streamable_base<T>
{
private:
T const &t_;
public:
explicit streamable(T const &t) : t_(t) {}
template<typename U = T>
friend auto operator<<(std::ostream &sout, streamable const &s) ->
decltype(sout << std::declval<U const &>())
{
return sout << s.t_;
}
};
template<typename T>
streamable<T> stream(T const &t)
{
return streamable<T>{t};
}
template<typename T>
struct R
{
private:
char const *filename_;
int lineno_;
char const *expr_;
T t_;
bool dismissed_ = false;
template<typename U>
void oops(U const &u) const
{
std::cerr
<< "> ERROR: CHECK failed \"" << expr_ << "\"\n"
<< "> \t" << filename_ << '(' << lineno_ << ')' << '\n';
if(dismissed_)
std::cerr
<< "> \tEXPECTED: " << stream(u) << "\n> \tACTUAL: " << stream(t_) << '\n';
++test_failures();
}
void dismiss()
{
dismissed_ = true;
}
template<typename V = T>
auto eval_(int) -> decltype(!std::declval<V&>())
{
RANGES_DIAGNOSTIC_PUSH
RANGES_DIAGNOSTIC_IGNORE_FLOAT_CONVERSION
return !t_;
RANGES_DIAGNOSTIC_POP
}
bool eval_(long)
{
return true;
}
public:
R(char const *filename, int lineno, char const *expr, T &&t)
: filename_(filename), lineno_(lineno), expr_(expr)
, t_(std::forward<T>(t))
{}
R(R const&) = delete;
~R()
{
if(!dismissed_ && eval_(42))
this->oops(42);
}
template<typename U>
void operator==(U const &u)
{
dismiss();
if(!(t_ == u)) this->oops(u);
}
template<typename U>
void operator!=(U const &u)
{
dismiss();
if(!(t_ != u)) this->oops(u);
}
template<typename U>
void operator<(U const &u)
{
dismiss();
if(!(t_ < u)) this->oops(u);
}
template<typename U>
void operator<=(U const &u)
{
dismiss();
if(!(t_ <= u)) this->oops(u);
}
template<typename U>
void operator>(U const &u)
{
dismiss();
if(!(t_ > u)) this->oops(u);
}
template<typename U>
void operator>=(U const &u)
{
dismiss();
if(!(t_ >= u)) this->oops(u);
}
};
struct S
{
private:
char const *filename_;
int lineno_;
char const *expr_;
public:
S(char const *filename, int lineno, char const *expr)
: filename_(filename), lineno_(lineno), expr_(expr)
{}
template<typename T>
R<T> operator->*(T &&t)
{
return {filename_, lineno_, expr_, std::forward<T>(t)};
}
};
constexpr bool static_check(bool b, const char * message)
{
if(!b)
{
// an error about this subexpression not valid in a constant expression
// means the check failed
// the message should be printed in the compiler output
throw std::logic_error{message};
}
return true;
}
} // namespace test_impl
inline int test_result()
{
return ::test_impl::test_failures() ? EXIT_FAILURE : EXIT_SUCCESS;
}
#define CHECK_LINE(file, line, ...) \
(void)(::test_impl::S{file, line, #__VA_ARGS__} ->* __VA_ARGS__) \
/**/
#define CHECK(...) CHECK_LINE(__FILE__, __LINE__, __VA_ARGS__)
#define STR(x) #x
#define STATIC_CHECK_LINE(file, line, ...) \
::test_impl::static_check(__VA_ARGS__, \
"> ERROR: CHECK failed \"" #__VA_ARGS__ "\"> " file "(" STR(line) ")")
#define STATIC_CHECK_IMPL(file, line, ...) \
do \
{ \
constexpr auto _ = STATIC_CHECK_LINE(file, line, __VA_ARGS__); \
(void)_; \
} while(0)
#define STATIC_CHECK_RETURN_IMPL(file, line, ...) \
if (!STATIC_CHECK_LINE(file, line, __VA_ARGS__)) return false
// use that as a standalone check
#define STATIC_CHECK(...) STATIC_CHECK_IMPL(__FILE__, __LINE__, __VA_ARGS__)
// use that in a constexpr test returning bool
#define STATIC_CHECK_RETURN(...) STATIC_CHECK_RETURN_IMPL(__FILE__, __LINE__, __VA_ARGS__)
template<class>
struct undef;
#endif
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