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Cherry-picked "evaluate" refactoring from dev-modernize branch

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- fixed up NULL comparisons to allow for NULL being a long
- should address #981
This commit is contained in:
Phil Nash 2017-08-06 00:13:00 +01:00 committed by Martin Hořeňovský
parent b07a2bdf87
commit b7bd52cc98
2 changed files with 57 additions and 133 deletions
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178
include/internal/catch_evaluate.hpp
View File

@ -37,12 +37,7 @@ namespace Internal {
template<> struct OperatorTraits<IsGreaterThanOrEqualTo>{ static const char* getName(){ return ">="; } };
template<typename T>
T& opCast(T const& t) { return const_cast<T&>(t); }
// nullptr_t support based on pull request #154 from Konstantin Baumann
#ifdef CATCH_CONFIG_CPP11_NULLPTR
inline std::nullptr_t opCast(std::nullptr_t) { return nullptr; }
#endif // CATCH_CONFIG_CPP11_NULLPTR
T& removeConst(T const &t) { return const_cast<T&>(t); }
// So the compare overloads can be operator agnostic we convey the operator as a template
@ -53,161 +48,90 @@ namespace Internal {
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsEqualTo> {
static bool evaluate( T1 const& lhs, T2 const& rhs) {
return bool( opCast( lhs ) == opCast( rhs ) );
return bool(removeConst(lhs) == removeConst(rhs) );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsNotEqualTo> {
static bool evaluate( T1 const& lhs, T2 const& rhs ) {
return bool( opCast( lhs ) != opCast( rhs ) );
return bool(removeConst(lhs) != removeConst(rhs) );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsLessThan> {
static bool evaluate( T1 const& lhs, T2 const& rhs ) {
return bool( opCast( lhs ) < opCast( rhs ) );
return bool(removeConst(lhs) < removeConst(rhs) );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsGreaterThan> {
static bool evaluate( T1 const& lhs, T2 const& rhs ) {
return bool( opCast( lhs ) > opCast( rhs ) );
return bool(removeConst(lhs) > removeConst(rhs) );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsGreaterThanOrEqualTo> {
static bool evaluate( T1 const& lhs, T2 const& rhs ) {
return bool( opCast( lhs ) >= opCast( rhs ) );
return bool(removeConst(lhs) >= removeConst(rhs) );
}
};
template<typename T1, typename T2>
struct Evaluator<T1, T2, IsLessThanOrEqualTo> {
static bool evaluate( T1 const& lhs, T2 const& rhs ) {
return bool( opCast( lhs ) <= opCast( rhs ) );
return bool(removeConst(lhs) <= removeConst(rhs) );
}
};
template<Operator Op, typename T1, typename T2>
bool applyEvaluator( T1 const& lhs, T2 const& rhs ) {
return Evaluator<T1, T2, Op>::evaluate( lhs, rhs );
// Special case for comparing a pointer to an int (deduced for p==0)
template<typename T>
struct Evaluator<int const&, T* const&, IsEqualTo> {
static bool evaluate( int lhs, T* rhs) {
return reinterpret_cast<void const*>( lhs ) == rhs;
}
};
template<typename T>
struct Evaluator<T* const&, int const&, IsEqualTo> {
static bool evaluate( T* lhs, int rhs) {
return lhs == reinterpret_cast<void const*>( rhs );
}
};
template<typename T>
struct Evaluator<int const&, T* const&, IsNotEqualTo> {
static bool evaluate( int lhs, T* rhs) {
return reinterpret_cast<void const*>( lhs ) != rhs;
}
};
template<typename T>
struct Evaluator<T* const&, int const&, IsNotEqualTo> {
static bool evaluate( T* lhs, int rhs) {
return lhs != reinterpret_cast<void const*>( rhs );
}
};
// This level of indirection allows us to specialise for integer types
// to avoid signed/ unsigned warnings
// "base" overload
template<Operator Op, typename T1, typename T2>
bool compare( T1 const& lhs, T2 const& rhs ) {
return Evaluator<T1, T2, Op>::evaluate( lhs, rhs );
template<typename T>
struct Evaluator<long const&, T* const&, IsEqualTo> {
static bool evaluate( long lhs, T* rhs) {
return reinterpret_cast<void const*>( lhs ) == rhs;
}
// unsigned X to int
template<Operator Op> bool compare( unsigned int lhs, int rhs ) {
return applyEvaluator<Op>( lhs, static_cast<unsigned int>( rhs ) );
};
template<typename T>
struct Evaluator<T* const&, long const&, IsEqualTo> {
static bool evaluate( T* lhs, long rhs) {
return lhs == reinterpret_cast<void const*>( rhs );
}
template<Operator Op> bool compare( unsigned long lhs, int rhs ) {
return applyEvaluator<Op>( lhs, static_cast<unsigned int>( rhs ) );
};
template<typename T>
struct Evaluator<long const&, T* const&, IsNotEqualTo> {
static bool evaluate( long lhs, T* rhs) {
return reinterpret_cast<void const*>( lhs ) != rhs;
}
template<Operator Op> bool compare( unsigned char lhs, int rhs ) {
return applyEvaluator<Op>( lhs, static_cast<unsigned int>( rhs ) );
};
template<typename T>
struct Evaluator<T* const&, long const&, IsNotEqualTo> {
static bool evaluate( T* lhs, long rhs) {
return lhs != reinterpret_cast<void const*>( rhs );
}
// unsigned X to long
template<Operator Op> bool compare( unsigned int lhs, long rhs ) {
return applyEvaluator<Op>( lhs, static_cast<unsigned long>( rhs ) );
}
template<Operator Op> bool compare( unsigned long lhs, long rhs ) {
return applyEvaluator<Op>( lhs, static_cast<unsigned long>( rhs ) );
}
template<Operator Op> bool compare( unsigned char lhs, long rhs ) {
return applyEvaluator<Op>( lhs, static_cast<unsigned long>( rhs ) );
}
// int to unsigned X
template<Operator Op> bool compare( int lhs, unsigned int rhs ) {
return applyEvaluator<Op>( static_cast<unsigned int>( lhs ), rhs );
}
template<Operator Op> bool compare( int lhs, unsigned long rhs ) {
return applyEvaluator<Op>( static_cast<unsigned int>( lhs ), rhs );
}
template<Operator Op> bool compare( int lhs, unsigned char rhs ) {
return applyEvaluator<Op>( static_cast<unsigned int>( lhs ), rhs );
}
// long to unsigned X
template<Operator Op> bool compare( long lhs, unsigned int rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
template<Operator Op> bool compare( long lhs, unsigned long rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
template<Operator Op> bool compare( long lhs, unsigned char rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
// pointer to long (when comparing against NULL)
template<Operator Op, typename T> bool compare( long lhs, T* rhs ) {
return Evaluator<T*, T*, Op>::evaluate( reinterpret_cast<T*>( lhs ), rhs );
}
template<Operator Op, typename T> bool compare( T* lhs, long rhs ) {
return Evaluator<T*, T*, Op>::evaluate( lhs, reinterpret_cast<T*>( rhs ) );
}
// pointer to int (when comparing against NULL)
template<Operator Op, typename T> bool compare( int lhs, T* rhs ) {
return Evaluator<T*, T*, Op>::evaluate( reinterpret_cast<T*>( lhs ), rhs );
}
template<Operator Op, typename T> bool compare( T* lhs, int rhs ) {
return Evaluator<T*, T*, Op>::evaluate( lhs, reinterpret_cast<T*>( rhs ) );
}
#ifdef CATCH_CONFIG_CPP11_LONG_LONG
// long long to unsigned X
template<Operator Op> bool compare( long long lhs, unsigned int rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
template<Operator Op> bool compare( long long lhs, unsigned long rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
template<Operator Op> bool compare( long long lhs, unsigned long long rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
template<Operator Op> bool compare( long long lhs, unsigned char rhs ) {
return applyEvaluator<Op>( static_cast<unsigned long>( lhs ), rhs );
}
// unsigned long long to X
template<Operator Op> bool compare( unsigned long long lhs, int rhs ) {
return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
}
template<Operator Op> bool compare( unsigned long long lhs, long rhs ) {
return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
}
template<Operator Op> bool compare( unsigned long long lhs, long long rhs ) {
return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
}
template<Operator Op> bool compare( unsigned long long lhs, char rhs ) {
return applyEvaluator<Op>( static_cast<long>( lhs ), rhs );
}
// pointer to long long (when comparing against NULL)
template<Operator Op, typename T> bool compare( long long lhs, T* rhs ) {
return Evaluator<T*, T*, Op>::evaluate( reinterpret_cast<T*>( lhs ), rhs );
}
template<Operator Op, typename T> bool compare( T* lhs, long long rhs ) {
return Evaluator<T*, T*, Op>::evaluate( lhs, reinterpret_cast<T*>( rhs ) );
}
#endif // CATCH_CONFIG_CPP11_LONG_LONG
#ifdef CATCH_CONFIG_CPP11_NULLPTR
// pointer to nullptr_t (when comparing against nullptr)
template<Operator Op, typename T> bool compare( std::nullptr_t, T* rhs ) {
return Evaluator<T*, T*, Op>::evaluate( nullptr, rhs );
}
template<Operator Op, typename T> bool compare( T* lhs, std::nullptr_t ) {
return Evaluator<T*, T*, Op>::evaluate( lhs, nullptr );
}
#endif // CATCH_CONFIG_CPP11_NULLPTR
};
} // end of namespace Internal
} // end of namespace Catch

2
include/internal/catch_expression_lhs.hpp
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@ -111,7 +111,7 @@ public:
void endExpression() const {
m_rb
.setResultType( Internal::compare<Op>( m_lhs, m_rhs ) )
.setResultType( Internal::Evaluator<LhsT, RhsT, Op>::evaluate( m_lhs, m_rhs ) )
.endExpression( *this );
}