better support of types with const/volatile qualifiers, thanks to Kalle Rutanen
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@208 7ec92016-0320-0410-acc4-a06ded1c099a
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syntheticpp
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1 changed files with 92 additions and 93 deletions
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@ -64,12 +64,14 @@ namespace Loki
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namespace Private
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{
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typedef TYPELIST_4(unsigned char, unsigned short int,
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unsigned int, unsigned long int) StdUnsignedInts;
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typedef TYPELIST_4(signed char, short int,
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int, long int) StdSignedInts;
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typedef TYPELIST_3(bool, char, wchar_t) StdOtherInts;
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typedef TYPELIST_3(float, double, long double) StdFloats;
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typedef TYPELIST_4(unsigned char, unsigned short int,unsigned int, unsigned long int)
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StdUnsignedInts;
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typedef TYPELIST_4(signed char, short int,int, long int)
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StdSignedInts;
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typedef TYPELIST_3(bool, char, wchar_t)
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StdOtherInts;
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typedef TYPELIST_3(float, double, long double)
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StdFloats;
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template <class U> struct AddReference
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{
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@ -89,55 +91,38 @@ namespace Loki
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////////////////////////////////////////////////////////////////////////////////
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// class template TypeTraits
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// Figures out various properties of any given type
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// Invocations (T is a type):
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// a) TypeTraits<T>::isPointer
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// returns (at compile time) true if T is a pointer type
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// b) TypeTraits<T>::PointeeType
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// returns the type to which T points is T is a pointer type, NullType otherwise
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// a) TypeTraits<T>::isReference
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// returns (at compile time) true if T is a reference type
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// b) TypeTraits<T>::ReferredType
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// returns the type to which T refers is T is a reference type, NullType
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// otherwise
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// c) TypeTraits<T>::isMemberPointer
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// returns (at compile time) true if T is a pointer to member type
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// d) TypeTraits<T>::isStdUnsignedInt
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// returns (at compile time) true if T is a standard unsigned integral type
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// e) TypeTraits<T>::isStdSignedInt
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// returns (at compile time) true if T is a standard signed integral type
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// f) TypeTraits<T>::isStdIntegral
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// returns (at compile time) true if T is a standard integral type
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// g) TypeTraits<T>::isStdFloat
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// returns (at compile time) true if T is a standard floating-point type
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// h) TypeTraits<T>::isStdArith
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// returns (at compile time) true if T is a standard arithmetic type
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// i) TypeTraits<T>::isStdFundamental
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// returns (at compile time) true if T is a standard fundamental type
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// j) TypeTraits<T>::isUnsignedInt
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// returns (at compile time) true if T is a unsigned integral type
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// k) TypeTraits<T>::isSignedInt
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// returns (at compile time) true if T is a signed integral type
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// l) TypeTraits<T>::isIntegral
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// returns (at compile time) true if T is a integral type
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// m) TypeTraits<T>::isFloat
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// returns (at compile time) true if T is a floating-point type
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// n) TypeTraits<T>::isArith
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// returns (at compile time) true if T is a arithmetic type
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// o) TypeTraits<T>::isFundamental
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// returns (at compile time) true if T is a fundamental type
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// p) TypeTraits<T>::ParameterType
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// returns the optimal type to be used as a parameter for functions that take Ts
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// q) TypeTraits<T>::isConst
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// returns (at compile time) true if T is a const-qualified type
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// r) TypeTraits<T>::NonConstType
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// removes the 'const' qualifier from T, if any
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// s) TypeTraits<T>::isVolatile
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// returns (at compile time) true if T is a volatile-qualified type
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// t) TypeTraits<T>::NonVolatileType
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// removes the 'volatile' qualifier from T, if any
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// u) TypeTraits<T>::UnqualifiedType
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// removes both the 'const' and 'volatile' qualifiers from T, if any
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//
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// Figures out at compile time various properties of any given type
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// Invocations (T is a type, TypeTraits<T>::Propertie):
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//
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// a) isPointer : returns true if T is a pointer type
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// b) PointeeType : returns the type to which T points if T is a pointer
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// type, NullType otherwise
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// a) isReference : returns true if T is a reference type
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// b) ReferredType : returns the type to which T refers if T is a reference
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// type, NullType otherwise
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// c) isMemberPointer : returns true if T is a pointer to member type
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// d) isStdUnsignedInt: returns true if T is a standard unsigned integral type
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// e) isStdSignedInt : returns true if T is a standard signed integral type
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// f) isStdIntegral : returns true if T is a standard integral type
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// g) isStdFloat : returns true if T is a standard floating-point type
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// h) isStdArith : returns true if T is a standard arithmetic type
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// i) isStdFundamental: returns true if T is a standard fundamental type
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// j) isUnsignedInt : returns true if T is a unsigned integral type
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// k) isSignedInt : returns true if T is a signed integral type
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// l) isIntegral : returns true if T is a integral type
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// m) isFloat : returns true if T is a floating-point type
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// n) isArith : returns true if T is a arithmetic type
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// o) isFundamental : returns true if T is a fundamental type
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// p) ParameterType : returns the optimal type to be used as a parameter for
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// functions that take Ts
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// q) isConst : returns true if T is a const-qualified type
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// r) NonConstType : Type with removed 'const' qualifier from T, if any
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// s) isVolatile : returns true if T is a volatile-qualified type
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// t) NonVolatileType : Type with removed 'volatile' qualifier from T, if any
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// u) UnqualifiedType : Type with removed 'const' and 'volatile' qualifiers from
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// T, if any
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//
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////////////////////////////////////////////////////////////////////////////////
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template <typename T>
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@ -173,8 +158,7 @@ namespace Loki
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enum { result = false };
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};
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template <class U, class V>
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struct PToMTraits<U V::*>
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template <class U, class V> struct PToMTraits<U V::*>
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{
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enum { result = true };
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};
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@ -191,6 +175,12 @@ namespace Loki
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enum { isConst = 1 };
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};
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template <class U> struct UnConst<const U&>
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{
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typedef U& Result;
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enum { isConst = 1 };
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};
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template <class U> struct UnVolatile
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{
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typedef U Result;
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@ -203,50 +193,59 @@ namespace Loki
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enum { isVolatile = 1 };
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};
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template <class U> struct UnVolatile<volatile U&>
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{
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typedef U& Result;
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enum { isVolatile = 1 };
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};
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public:
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enum { isPointer = PointerTraits<T>::result };
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typedef typename PointerTraits<T>::PointeeType PointeeType;
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enum { isReference = ReferenceTraits<T>::result };
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typedef typename ReferenceTraits<T>::ReferredType ReferredType;
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enum { isMemberPointer = PToMTraits<T>::result };
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enum { isStdUnsignedInt =
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TL::IndexOf<Private::StdUnsignedInts, T>::value >= 0 };
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enum { isStdSignedInt =
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TL::IndexOf<Private::StdSignedInts, T>::value >= 0 };
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enum { isStdIntegral = isStdUnsignedInt || isStdSignedInt ||
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TL::IndexOf<Private::StdOtherInts, T>::value >= 0 };
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enum { isStdFloat = TL::IndexOf<Private::StdFloats, T>::value >= 0 };
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enum { isStdArith = isStdIntegral || isStdFloat };
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enum { isStdFundamental = isStdArith || isStdFloat ||
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Conversion<T, void>::sameType };
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enum { isUnsignedInt = isStdUnsignedInt || IsCustomUnsignedInt<T>::value };
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enum { isSignedInt = isStdSignedInt || IsCustomSignedInt<T>::value };
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enum { isIntegral = isStdIntegral || isUnsignedInt || isSignedInt };
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enum { isFloat = isStdFloat || IsCustomFloat<T>::value };
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enum { isArith = isIntegral || isFloat };
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enum { isFundamental = isStdFundamental || isArith || isFloat };
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typedef typename Select<isStdArith || isPointer || isMemberPointer,
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T, typename Private::AddReference<T>::Result>::Result ParameterType;
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enum { isConst = UnConst<T>::isConst };
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typedef typename UnConst<T>::Result NonConstType;
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enum { isVolatile = UnVolatile<T>::isVolatile };
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typedef typename UnVolatile<T>::Result NonVolatileType;
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typedef typename UnConst<T>::Result
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NonConstType;
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typedef typename UnVolatile<T>::Result
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NonVolatileType;
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typedef typename UnVolatile<typename UnConst<T>::Result>::Result
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UnqualifiedType;
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typedef typename PointerTraits<T>::PointeeType
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PointeeType;
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typedef typename ReferenceTraits<T>::ReferredType
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ReferredType;
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enum { isConst = UnConst<T>::isConst };
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enum { isVolatile = UnVolatile<T>::isVolatile };
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enum { isPointer = PointerTraits<UnqualifiedType>::result };
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enum { isReference = ReferenceTraits<UnqualifiedType>::result };
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enum { isMemberPointer = PToMTraits<UnqualifiedType>::result };
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enum { isStdUnsignedInt = TL::IndexOf<Private::StdUnsignedInts, UnqualifiedType>::value>= 0 };
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enum { isStdSignedInt = TL::IndexOf<Private::StdSignedInts, UnqualifiedType>::value>= 0 };
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enum { isStdIntegral = isStdUnsignedInt || isStdSignedInt || TL::IndexOf<Private::StdOtherInts,
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UnqualifiedType>::value >= 0 };
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enum { isStdFloat = TL::IndexOf<Private::StdFloats, UnqualifiedType>::value>= 0 };
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enum { isStdArith = isStdIntegral || isStdFloat };
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enum { isStdFundamental = isStdArith || isStdFloat || Conversion<T, void>::sameType };
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enum { isUnsignedInt = isStdUnsignedInt || IsCustomUnsignedInt<UnqualifiedType>::value };
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enum { isSignedInt = isStdSignedInt || IsCustomSignedInt<UnqualifiedType>::value };
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enum { isIntegral = isStdIntegral || isUnsignedInt || isSignedInt };
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enum { isFloat = isStdFloat || IsCustomFloat<UnqualifiedType>::value };
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enum { isArith = isIntegral || isFloat };
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enum { isFundamental = isStdFundamental || isArith || isFloat };
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typedef typename Select<isStdArith || isPointer || isMemberPointer,T,
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typename Private::AddReference<T>::Result>::Result
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ParameterType;
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};
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}
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////////////////////////////////////////////////////////////////////////////////
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// Change log:
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// June 20, 2001: ported by Nick Thurn to gcc 2.95.3. Kudos, Nick!!!
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// June 20, 2001: ported by Nick Thurn to gcc 2.95.3. Kudos, Nick!!!
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// September 16, 2002: ParameterType fixed, as TypeTraits<void> made
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// ParameterType give error about reference to void. T.S.
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// ParameterType give error about reference to void. T.S.
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// August 26, 2005: better support of types with const/volatile qualifiers,
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// thanks to Kalle Rutanen
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////////////////////////////////////////////////////////////////////////////////
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#endif // TYPETRAITS_INC_
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