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// Copyright Joakim Karlsson & Kim Gräsman 2010-2012.
// 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)
#ifndef IGLOO_HASLENGTHCONSTRAINT_H
#define IGLOO_HASLENGTHCONSTRAINT_H
#include "./expressions/expression.h"
namespace snowhouse {
template <typename ExpectedType>
struct HasLengthConstraint : Expression< HasLengthConstraint<ExpectedType> >
{
HasLengthConstraint(const ExpectedType& expected)
: m_expected(expected) {}
template <typename ActualType>
bool operator()(const ActualType& actual) const
{
typedef typename ActualType::size_type SizeType;
SizeType expectedSize = static_cast<SizeType>(m_expected);
return (actual.size() == expectedSize);
}
ExpectedType m_expected;
};
template< typename ExpectedType >
inline HasLengthConstraint<ExpectedType> HasLength(const ExpectedType& expected)
{
return HasLengthConstraint<ExpectedType>(expected);
}
inline HasLengthConstraint<int> IsEmpty()
{
return HasLength<int>(0);
}
inline HasLengthConstraint<std::string> HasLength(const char* expected)
{
return HasLengthConstraint<std::string>(expected);
}
template< typename ExpectedType >
struct Stringizer< HasLengthConstraint< ExpectedType > >
{
static std::string ToString(const HasLengthConstraint<ExpectedType>& constraint)
{
std::ostringstream builder;
builder << "of length " << snowhouse::Stringize(constraint.m_expected);
return builder.str();
}
};
}
#endif
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