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replaced "clone" with "derived" in CRTP (more usual, more flexible, more clear in its intent, and avoids copying the object twice on compilers that don't optimise return by value)

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This commit is contained in:
Mathew Sutcliffe
2013-04-30 00:09:32 +01:00
parent ba70a150e0
commit a05b85135c
5 changed files with 55 additions and 29 deletions
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31
src/blackmisc/mathmatrixbase.h
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@@ -32,12 +32,21 @@ protected:
QString stringForConverter() const;
/*!
* \brief Clone as conrete implementation
* \brief Easy access to derived class (CRTP template parameter)
* \return
*/
ImplMatrix clone() const
ImplMatrix const* derived() const
{
return static_cast<ImplMatrix const &>(*this);
return static_cast<ImplMatrix const *>(this);
}
/*!
* \brief Easy access to derived class (CRTP template parameter)
* \return
*/
ImplMatrix* derived()
{
return static_cast<ImplMatrix *>(this);
}
public:
@@ -118,7 +127,7 @@ public:
*/
ImplMatrix operator *(double factor) const
{
ImplMatrix m = this->clone();
ImplMatrix m = *derived();
m *= factor;
return m;
}
@@ -159,7 +168,7 @@ public:
*/
ImplMatrix operator /(double factor) const
{
ImplMatrix m = this->clone();
ImplMatrix m = *derived();
m /= factor;
return m;
}
@@ -182,7 +191,7 @@ public:
*/
ImplMatrix operator +(const ImplMatrix &otherMatrix) const
{
ImplMatrix m = this->clone();
ImplMatrix m = *derived();
m += otherMatrix;
return m;
}
@@ -205,7 +214,7 @@ public:
*/
ImplMatrix operator -(const ImplMatrix &otherMatrix) const
{
ImplMatrix m = this->clone();
ImplMatrix m = *derived();
m -= otherMatrix;
return m;
}
@@ -225,8 +234,8 @@ public:
*/
bool isIdentityEpsilon() const
{
ImplMatrix m = this->clone().round();
return m.isIdentity();
ImplMatrix m = *derived();
return m.round().isIdentity();
}
/*!
@@ -260,8 +269,8 @@ public:
*/
bool isZeroEpsilon() const
{
ImplMatrix m = this->clone().round();
return m.isZero();
ImplMatrix m = *derived();
return m.round().isZero();
}
/*!