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getSubField<T>() fail to compile when T isn't PVField or a sub-class

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This commit is contained in:
Michael Davidsaver
2019-05-15 08:25:11 -07:00
parent cd2436342d
commit 4cc9b650c5
1 changed files with 10 additions and 0 deletions
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10
src/pv/pvData.h
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@@ -17,6 +17,8 @@
#include <iostream>
#include <iomanip>
#include <epicsAssert.h>
#include <pv/pvIntrospect.h>
#include <pv/typeCast.h>
#include <pv/anyscalar.h>
@@ -237,6 +239,7 @@ public:
void copyUnchecked(const PVField& from);
static size_t num_instances; // use atomic::get() or volatile* access
enum {isPVField=1};
protected:
PVField::shared_pointer getPtrSelf()
{
@@ -762,12 +765,14 @@ public:
template<typename PVD, typename A>
inline std::tr1::shared_ptr<PVD> getSubField(A a)
{
STATIC_ASSERT(PVD::isPVField); // only allow cast from PVField sub-class
return std::tr1::dynamic_pointer_cast<PVD>(getSubFieldImpl(a, false));
}
template<typename PVD, typename A>
inline std::tr1::shared_ptr<const PVD> getSubField(A a) const
{
STATIC_ASSERT(PVD::isPVField); // only allow cast from PVField sub-class
return std::tr1::dynamic_pointer_cast<const PVD>(getSubFieldImpl(a, false));
}
@@ -800,6 +805,7 @@ public:
template<typename PVD, typename A>
inline std::tr1::shared_ptr<PVD> getSubFieldT(A a)
{
STATIC_ASSERT(PVD::isPVField); // only allow cast from PVField sub-class
std::tr1::shared_ptr<PVD> ret(std::tr1::dynamic_pointer_cast<PVD>(getSubFieldImpl(a, true)));
if(!ret)
throwBadFieldType(a);
@@ -809,6 +815,7 @@ public:
template<typename PVD, typename A>
inline std::tr1::shared_ptr<const PVD> getSubFieldT(A a) const
{
STATIC_ASSERT(PVD::isPVField); // only allow cast from PVField sub-class
std::tr1::shared_ptr<const PVD> ret(std::tr1::dynamic_pointer_cast<const PVD>(getSubFieldImpl(a, true)));
if(!ret)
throwBadFieldType(a);
@@ -963,11 +970,13 @@ public:
template<typename PVT>
inline std::tr1::shared_ptr<PVT> get() {
STATIC_ASSERT(PVT::isPVField); // only allow cast from PVField sub-class
return std::tr1::dynamic_pointer_cast<PVT>(get());
}
template<typename PVT>
inline std::tr1::shared_ptr<const PVT> get() const {
STATIC_ASSERT(PVT::isPVField); // only allow cast from PVField sub-class
return std::tr1::dynamic_pointer_cast<const PVT>(get());
}
@@ -981,6 +990,7 @@ public:
template<typename PVT>
inline std::tr1::shared_ptr<PVT> select(int32 index) {
STATIC_ASSERT(PVT::isPVField); // only allow cast from PVField sub-class
return std::tr1::dynamic_pointer_cast<PVT>(select(index));
}