FBB::TypeTrait is a traits class. It does not define any member
functions or data members, but merely types. It can be used to determine the
basic type and other characteristics of (const) plain, (const) pointer or
(const) reference types. It was designed after Alexandrescu's (2001)
TypeTraits template class.
The FBB::LpromotesR class template is used to determine, compile-time,
whether its second (right-hand side) template type can be promoted to its
first (left-hand side) template type.
The FBB::Use class template expects two typenames LHS and RHS
and defines typename Use<LHS, RHS>::type as LHS if RHS can be
promoted to LHS or it defines typename Use<LHS, RHS>::type as RHS.
NAMESPACE
FBB
All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace FBB.
INHERITS FROM
-
TypeTrait<TYPE>
TYPE is the template type parameter whose characteristics must be
determined.
TypeTrait<TYPE> defines the type Plain: the plain type (the type
without const, pointer, reference type indication) of any const or non-const
plain, pointer, lvalue- or rvalue-reference type.
TypeTrait<TYPE> defines the following bool values:
isClass: true if the template type argument represents a
class (struct) type, false otherwise.
isConst: true if the template type argument represents a
const type, false otherwise.
isPointer: true if the template type argument represents a
pointer type, false otherwise.
isR_Ref: true if the template type argument represents a
rvalue reference type, false otherwise.
isRef: true if the template type argument represents an
lvalue reference type, false otherwise.
LpromotesR<LeftType, RightType>
LpromotesR<LeftType, RightType> defines the enum constant yes as 1
if an RightType argument can be promoted to LeftType value or object.
The enum value yes is defined as 0 if no such constructor is available or if
such a constructor is defined using the explicit keyword.