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Implement evaluator<ReturnByValue>.

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All supported tests pass apart from Sparse and Geometry,
except test in adjoint_4 that a = a.transpose() raises an assert.
This commit is contained in:
Jitse Niesen 2014-04-16 18:16:36 +01:00
parent b30706bd5c
commit ffc995c9e4
1 changed files with 26 additions and 0 deletions
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26
Eigen/src/Core/CoreEvaluators.h
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@ -1292,6 +1292,32 @@ private:
EIGEN_STRONG_INLINE Index colOffset() const { return m_index.value() > 0 ? m_index.value() : 0; } EIGEN_STRONG_INLINE Index colOffset() const { return m_index.value() > 0 ? m_index.value() : 0; }
}; };
// -------------------- ReturnByValue --------------------
// Expression is evaluated in a temporary; default implementation of Assignment is bypassed so that
// when a ReturnByValue expression is assigned, the evaluator is not constructed.
// TODO: Finalize port to new regime; ReturnByValue should not exist in the expression world
template<typename Derived>
struct evaluator<ReturnByValue<Derived> >
: evaluator<typename ReturnByValue<Derived>::PlainObject>::type
{
typedef typename ReturnByValue<Derived>::PlainObject PlainObject;
typedef typename evaluator<PlainObject>::type Base;
typedef evaluator type;
typedef evaluator nestedType;
evaluator(const ReturnByValue<Derived>& xpr)
: m_result(xpr.rows(), xpr.cols())
{
::new (static_cast<Base*>(this)) Base(m_result);
xpr.evalTo(m_result);
}
PlainObject m_result;
};
} // namespace internal } // namespace internal
} // end namespace Eigen } // end namespace Eigen