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Implemented the sf::Packet to bool conversion using the safe-bool idiom

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This commit is contained in:
Laurent Gomila 2011-05-25 20:45:16 +02:00
parent 43d4d0bb28
commit 94ab420dd3
2 changed files with 19 additions and 3 deletions
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18
include/SFML/Network/Packet.hpp
View File

@ -46,6 +46,9 @@ class UdpSocket;
////////////////////////////////////////////////////////////
class SFML_API Packet
{
// A bool-like type that cannot be converted to integer or pointer types
typedef bool (Packet::*BoolType)(std::size_t);
public :
////////////////////////////////////////////////////////////
@ -125,6 +128,8 @@ public :
////////////////////////////////////////////////////////////
bool EndOfPacket() const;
public:
////////////////////////////////////////////////////////////
/// \brief Test the validity of the packet, for reading
///
@ -154,12 +159,16 @@ public :
/// }
/// \endcode
///
/// Don't focus on the return type, it's equivalent to bool but
/// it disallows unwanted implicit conversions to integer or
/// pointer types.
///
/// \return True if last data extraction from packet was successful
///
/// \see EndOfPacket
///
////////////////////////////////////////////////////////////
operator void*() const;
operator BoolType() const;
////////////////////////////////////////////////////////////
/// Overloads of operator >> to read data from the packet
@ -204,6 +213,13 @@ private :
friend class TcpSocket;
friend class UdpSocket;
////////////////////////////////////////////////////////////
/// Disallow comparisons between packets
///
////////////////////////////////////////////////////////////
bool operator ==(const Packet& right) const;
bool operator !=(const Packet& right) const;
////////////////////////////////////////////////////////////
/// \brief Check if the packet can extract a given number of bytes
///

4
src/SFML/Network/Packet.cpp
View File

@ -92,9 +92,9 @@ bool Packet::EndOfPacket() const
////////////////////////////////////////////////////////////
Packet::operator void*() const
Packet::operator BoolType() const
{
return myIsValid ? const_cast<Packet*>(this) : NULL;
return myIsValid ? &Packet::CheckSize : NULL;
}