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// (C) Copyright Gennadiy Rozental 2011-2014.
// Distributed under 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)
// See http://www.boost.org/libs/test for the library home page.
//
//!@file
//!@brief Defines framework for automated assertion construction
// ***************************************************************************
#ifndef BOOST_TEST_TOOLS_ASSERTION_HPP_100911GER
#define BOOST_TEST_TOOLS_ASSERTION_HPP_100911GER
// Boost.Test
#include <boost/test/tools/assertion_result.hpp>
#include <boost/test/tools/detail/print_helper.hpp>
#include <boost/test/tools/detail/fwd.hpp>
// Boost
#include <boost/type.hpp>
#include <boost/type_traits/decay.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/utility/declval.hpp>
#include <boost/type_traits/remove_reference.hpp>
// STL
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
#include <utility>
#endif
#include <boost/test/detail/suppress_warnings.hpp>
//____________________________________________________________________________//
namespace boost {
namespace test_tools {
namespace assertion {
// ************************************************************************** //
// ************** assertion::operators ************** //
// ************************************************************************** //
// precedence 4: ->*, .*
// precedence 5: *, /, %
// precedence 6: +, -
// precedence 7: << , >>
// precedence 8: <, <=, > and >=
// precedence 9: == and !=
// precedence 10: bitwise AND
// precedence 11: bitwise XOR
// precedence 12: bitwise OR
// precedence 13: logical AND
// disabled
// precedence 14: logical OR
// disabled
// precedence 15: ternary conditional
// disabled
// precedence 16: = and OP= operators
// precedence 17: throw operator
// not supported
// precedence 18: comma
// not supported
namespace op {
#define BOOST_TEST_FOR_EACH_COMP_OP(action) \
action( < , LT, >= ) \
action( <=, LE, > ) \
action( > , GT, <= ) \
action( >=, GE, < ) \
action( ==, EQ, != ) \
action( !=, NE, == ) \
/**/
//____________________________________________________________________________//
#ifndef BOOST_NO_CXX11_DECLTYPE
#define BOOST_TEST_FOR_EACH_CONST_OP(action)\
action(->*, MEMP, ->* ) \
\
action( * , MUL, * ) \
action( / , DIV, / ) \
action( % , MOD, % ) \
\
action( + , ADD, + ) \
action( - , SUB, - ) \
\
action( <<, LSH, << ) \
action( >>, RSH, >> ) \
\
BOOST_TEST_FOR_EACH_COMP_OP(action) \
\
action( & , BAND, & ) \
action( ^ , XOR, ^ ) \
action( | , BOR, | ) \
/**/
#else
#define BOOST_TEST_FOR_EACH_CONST_OP(action)\
BOOST_TEST_FOR_EACH_COMP_OP(action) \
/**/
#endif
//____________________________________________________________________________//
#define BOOST_TEST_FOR_EACH_MUT_OP(action) \
action( = , SET , = ) \
action( +=, IADD, += ) \
action( -=, ISUB, -= ) \
action( *=, IMUL, *= ) \
action( /=, IDIV, /= ) \
action( %=, IMOD, %= ) \
action(<<=, ILSH, <<=) \
action(>>=, IRSH, >>=) \
action( &=, IAND, &= ) \
action( ^=, IXOR, ^= ) \
action( |=, IOR , |= ) \
/**/
//____________________________________________________________________________//
#ifndef BOOST_NO_CXX11_DECLTYPE
# define DEDUCE_RESULT_TYPE( oper ) \
decltype(boost::declval<Lhs>() oper boost::declval<Rhs>() ) optype; \
typedef typename boost::remove_reference<optype>::type \
/**/
#else
# define DEDUCE_RESULT_TYPE( oper ) bool
#endif
#define DEFINE_CONST_OPER( oper, name, rev ) \
template<typename Lhs, typename Rhs, \
typename Enabler=void> \
struct name { \
typedef DEDUCE_RESULT_TYPE( oper ) result_type; \
\
static result_type \
eval( Lhs const& lhs, Rhs const& rhs ) \
{ \
return lhs oper rhs; \
} \
\
template<typename PrevExprType> \
static void \
report( std::ostream& ostr, \
PrevExprType const& lhs, \
Rhs const& rhs) \
{ \
lhs.report( ostr ); \
ostr << revert() \
<< tt_detail::print_helper( rhs ); \
} \
\
static char const* revert() \
{ return " " #rev " "; } \
}; \
/**/
BOOST_TEST_FOR_EACH_CONST_OP( DEFINE_CONST_OPER )
#undef DEDUCE_RESULT_TYPE
#undef DEFINE_CONST_OPER
//____________________________________________________________________________//
} // namespace op
// ************************************************************************** //
// ************** assertion::expression_base ************** //
// ************************************************************************** //
// Defines expression operators
template<typename Lhs, typename Rhs, typename OP> class binary_expr;
template<typename ExprType,typename ValType>
class expression_base {
public:
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
#define ADD_OP_SUPPORT( oper, name, _ ) \
template<typename T> \
binary_expr<ExprType,T, \
op::name<ValType,typename remove_reference<T>::type> > \
operator oper( T&& rhs ) \
{ \
return binary_expr<ExprType,T, \
op::name<ValType,typename remove_reference<T>::type> > \
( std::forward<ExprType>( \
*static_cast<ExprType*>(this) ), \
std::forward<T>(rhs) ); \
} \
/**/
#else
#define ADD_OP_SUPPORT( oper, name, _ ) \
template<typename T> \
binary_expr<ExprType,typename boost::decay<T const>::type, \
op::name<ValType,typename boost::decay<T const>::type> > \
operator oper( T const& rhs ) const \
{ \
typedef typename boost::decay<T const>::type Rhs; \
return binary_expr<ExprType,Rhs,op::name<ValType,Rhs> > \
( *static_cast<ExprType const*>(this), \
rhs ); \
} \
/**/
#endif
BOOST_TEST_FOR_EACH_CONST_OP( ADD_OP_SUPPORT )
#undef ADD_OP_SUPPORT
#ifndef BOOST_NO_CXX11_AUTO_DECLARATIONS
// Disabled operators
template<typename T>
ExprType&
operator ||( T const& /*rhs*/ )
{
BOOST_MPL_ASSERT_MSG(false, CANT_USE_LOGICAL_OPERATOR_OR_WITHIN_THIS_TESTING_TOOL, () );
return *static_cast<ExprType*>(this);
}
template<typename T>
ExprType&
operator &&( T const& /*rhs*/ )
{
BOOST_MPL_ASSERT_MSG(false, CANT_USE_LOGICAL_OPERATOR_AND_WITHIN_THIS_TESTING_TOOL, () );
return *static_cast<ExprType*>(this);
}
operator bool()
{
BOOST_MPL_ASSERT_MSG(false, CANT_USE_TERNARY_OPERATOR_WITHIN_THIS_TESTING_TOOL, () );
return false;
}
#endif
};
// ************************************************************************** //
// ************** assertion::value_expr ************** //
// ************************************************************************** //
// simple value expression
template<typename T>
class value_expr : public expression_base<value_expr<T>,typename remove_reference<T>::type> {
public:
// Public types
typedef T result_type;
// Constructor
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
value_expr( value_expr&& ve )
: m_value( std::forward<T>(ve.m_value) )
{}
explicit value_expr( T&& val )
: m_value( std::forward<T>(val) )
{}
#else
explicit value_expr( T const& val )
: m_value( val )
{}
#endif
// Specific expression interface
T const& value() const
{
return m_value;
}
void report( std::ostream& ostr ) const
{
ostr << tt_detail::print_helper( m_value );
}
// Mutating operators
#define ADD_OP_SUPPORT( OPER, ID, _ ) \
template<typename U> \
value_expr<T>& \
operator OPER( U const& rhs ) \
{ \
m_value OPER rhs; \
\
return *this; \
} \
/**/
BOOST_TEST_FOR_EACH_MUT_OP( ADD_OP_SUPPORT )
#undef ADD_OP_SUPPORT
// expression interface
assertion_result evaluate( bool no_message = false ) const
{
assertion_result res( value() );
if( no_message || res )
return res;
format_message( res.message(), value() );
return tt_detail::format_assertion_result( "", res.message().str() );
}
private:
template<typename U>
static void format_message( wrap_stringstream& ostr, U const& v ) { ostr << "[(bool)" << v << " is false]"; }
static void format_message( wrap_stringstream& /*ostr*/, bool /*v*/ ) {}
static void format_message( wrap_stringstream& /*ostr*/, assertion_result const& /*v*/ ) {}
// Data members
T m_value;
};
// ************************************************************************** //
// ************** assertion::binary_expr ************** //
// ************************************************************************** //
// binary expression
template<typename LExpr, typename Rhs, typename OP>
class binary_expr : public expression_base<binary_expr<LExpr,Rhs,OP>,typename OP::result_type> {
public:
// Public types
typedef typename OP::result_type result_type;
// Constructor
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
binary_expr( binary_expr&& be )
: m_lhs( std::forward<LExpr>(be.m_lhs) )
, m_rhs( std::forward<Rhs>(be.m_rhs) )
{}
binary_expr( LExpr&& lhs, Rhs&& rhs )
: m_lhs( std::forward<LExpr>(lhs) )
, m_rhs( std::forward<Rhs>(rhs) )
{}
#else
binary_expr( LExpr const& lhs, Rhs const& rhs )
: m_lhs( lhs )
, m_rhs( rhs )
{}
#endif
// Specific expression interface
result_type value() const
{
return OP::eval( m_lhs.value(), m_rhs );
}
void report( std::ostream& ostr ) const
{
return OP::report( ostr, m_lhs, m_rhs );
}
assertion_result evaluate( bool no_message = false ) const
{
assertion_result const expr_res( value() );
if( no_message || expr_res )
return expr_res;
wrap_stringstream buff;
report( buff.stream() );
return tt_detail::format_assertion_result( buff.stream().str(), expr_res.message() );
}
// To support custom manipulators
LExpr const& lhs() const { return m_lhs; }
Rhs const& rhs() const { return m_rhs; }
private:
// Data members
LExpr m_lhs;
Rhs m_rhs;
};
// ************************************************************************** //
// ************** assertion::seed ************** //
// ************************************************************************** //
// seed added ot the input expression to form an assertion expression
class seed {
public:
// ->* is highest precedence left to right operator
template<typename T>
value_expr<T>
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
operator->*( T&& v ) const
{
return value_expr<T>( std::forward<T>( v ) );
}
#else
operator->*( T const& v ) const
{
return value_expr<T>( v );
}
#endif
};
#undef BOOST_TEST_FOR_EACH_CONST_OP
} // namespace assertion
} // namespace test_tools
} // namespace boost
#include <boost/test/detail/enable_warnings.hpp>
#endif // BOOST_TEST_TOOLS_ASSERTION_HPP_100911GER
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