CODEWITHSUNDEEP
c++templatesvisual-c++gccsyntax-error
e.proydakov
e.proydakov

Reputation: 602

Error partial template specialization at compile GCC, but not MSVC

The following code, compiles fine MSVC, but when building GCC provides a lot of errors:

#define FORCE_INLINE inline
#define CREF(A) const A&

template <class F>
class RDOFunCalcStd: public RDOFunCalc
{
...
template <class T>
FORCE_INLINE T getParam(CREF(LPRDORuntime) pRuntime, ruint paramNumber);

template <>
FORCE_INLINE double getParam<double>(CREF(LPRDORuntime) pRuntime, ruint paramNumber)
{
    return pRuntime->getFuncArgument(paramNumber).getDouble();
}

template <>
FORCE_INLINE int getParam<int>(CREF(LPRDORuntime) pRuntime, ruint paramNumber)
{
    return pRuntime->getFuncArgument(paramNumber).getInt();
}
...
};

Errors list:

error: explicit specialization in non-namespace scope ‘class rdoRuntime::RDOFunCalcStd’

error: template-id ‘getParam’ in declaration of primary template

error: explicit specialization in non-namespace scope ‘class rdoRuntime::RDOFunCalcStd’

error: template-id ‘getParam’ in declaration of primary template

error: ‘int rdoRuntime::RDOFunCalcStd::getParam(const rdoRuntime::LPRDORuntime&, ruint)’ cannot be overloaded

error: with ‘double rdoRuntime::RDOFunCalcStd::getParam(const rdoRuntime::LPRDORuntime&, ruint)’

What should be done to solve the error?

Upvotes: 0

Views: 1347

Answers (1)

xis
xis

Reputation: 24850

See this

Article from Herb Sutter

It explained why. To be short, C++ does not support function template specialization.

Upvotes: 3

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