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refs #584 Moved Mixin::String to stringutils.h

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This commit is contained in:
Mathew Sutcliffe
2016-02-08 00:24:28 +00:00
parent 7c41b13ac9
commit c7a0aa2fb4
7 changed files with 83 additions and 76 deletions
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76
src/blackmisc/stringutils.h
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@@ -16,6 +16,7 @@
#include <QMap>
#include <QByteArray>
#include <QString>
#include <QDebug>
//! Free functions in BlackMisc
namespace BlackMisc
@@ -57,6 +58,81 @@ namespace BlackMisc
//! Byte array from hex value string per byte, 2 digits
BLACKMISC_EXPORT QByteArray byteArrayFromHexString(const QString &hexString);
namespace Mixin
{
/*!
* CRTP class template from which a derived class can inherit string streaming operations.
*
* \tparam Derived Must implement a public method QString convertToQString(bool i18n = false) const.
*
* \see BLACKMISC_DECLARE_USING_MIXIN_STRING
*/
template <class Derived>
class String
{
public:
//! Stream << overload to be used in debugging messages
friend QDebug operator<<(QDebug debug, const Derived &obj)
{
debug << obj.stringForStreaming();
return debug;
}
//! Operator << when there is no debug stream
friend QNoDebug operator<<(QNoDebug nodebug, const Derived &obj)
{
Q_UNUSED(obj);
return nodebug;
}
//! Operator << based on text stream
friend QTextStream &operator<<(QTextStream &stream, const Derived &obj)
{
stream << obj.stringForStreaming();
return stream;
}
//! Operator << for QDataStream
friend QDataStream &operator<<(QDataStream &stream, const Derived &obj)
{
stream << obj.stringForStreaming();
return stream;
}
//! Stream operator << for std::cout
friend std::ostream &operator<<(std::ostream &ostr, const Derived &obj)
{
ostr << obj.stringForStreaming().toStdString();
return ostr;
}
//! Cast as QString
QString toQString(bool i18n = false) const { return derived()->convertToQString(i18n); }
//! Cast to pretty-printed QString
QString toFormattedQString(bool i18n = false) const { return derived()->toQString(i18n); }
//! To std string
std::string toStdString(bool i18n = false) const { return derived()->convertToQString(i18n).toStdString(); }
//! String for streaming operators
QString stringForStreaming() const { return derived()->convertToQString(); }
private:
const Derived *derived() const { return static_cast<const Derived *>(this); }
Derived *derived() { return static_cast<Derived *>(this); }
};
/*!
* When a derived class and a base class both inherit from Mixin::String,
* the derived class uses this macro to disambiguate the inherited members.
*/
# define BLACKMISC_DECLARE_USING_MIXIN_STRING(DERIVED) \
using ::BlackMisc::Mixin::String<DERIVED>::toQString; \
using ::BlackMisc::Mixin::String<DERIVED>::toFormattedQString; \
using ::BlackMisc::Mixin::String<DERIVED>::toStdString; \
using ::BlackMisc::Mixin::String<DERIVED>::stringForStreaming;
} // ns
} // ns
#endif // guard