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refs #413 Decomposed stringification operations of CValueObject into Mixin::String.

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This commit is contained in:
Mathew Sutcliffe
2015-04-30 21:11:34 +01:00
parent b64ae55a86
commit 9b58959f9e
1 changed files with 70 additions and 45 deletions
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115
src/blackmisc/valueobject.h
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@@ -557,6 +557,65 @@ namespace BlackMisc
class CompareByTuple<Derived, false>
{};
/*!
* CRTP class template from which a derived class can inherit string streaming operations.
*/
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
virtual 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
virtual QString stringForStreaming() const { return derived()->convertToQString(); }
private:
const Derived *derived() const { return static_cast<const Derived *>(this); }
Derived *derived() { return static_cast<Derived *>(this); }
};
}
/*!
@@ -577,47 +636,13 @@ namespace BlackMisc
public Mixin::JsonByTuple<Derived, Policy::Json::IsMetaTuple<Derived, Base>::value>,
public Mixin::EqualsByTuple<Derived, Policy::Equals::IsMetaTuple<Derived, Base>::value>,
public Mixin::LessThanByTuple<Derived, Policy::LessThan::IsMetaTuple<Derived, Base>::value>,
public Mixin::CompareByTuple<Derived, Policy::Compare::IsMetaTuple<Derived, Base>::value>
public Mixin::CompareByTuple<Derived, Policy::Compare::IsMetaTuple<Derived, Base>::value>,
public Mixin::String<Derived>
{
static_assert(std::is_same<CEmpty, Base>::value || IsValueObject<Base>::value, "Base must be either CEmpty or derived from CValueObject");
using PropertyIndexPolicy = typename CValueObjectPolicy<Derived>::PropertyIndex;
//! 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 &textStream, const Derived &obj)
{
textStream << obj.stringForStreaming();
return textStream;
}
//! Operator << for QDataStream
friend QDataStream &operator<<(QDataStream &stream, const Derived &valueObject)
{
stream << valueObject.stringForStreaming();
return stream;
}
//! Stream operator << for std::cout
friend std::ostream &operator<<(std::ostream &ostr, const Derived &obj)
{
ostr << obj.stringForStreaming().toStdString();
return ostr;
}
public:
//! Base class
using base_type = Base;
@@ -633,14 +658,14 @@ namespace BlackMisc
IndexString
};
//! Cast as QString
QString toQString(bool i18n = false) const { return this->convertToQString(i18n); }
//! \copydoc BlackMisc::Mixin::String::toQString
using Mixin::String<Derived>::toQString;
//! Cast to pretty-printed QString
virtual QString toFormattedQString(bool i18n = false) const { return this->toQString(i18n); }
//! \copydoc BlackMisc::Mixin::String::toFormattedQString
virtual QString toFormattedQString(bool i18n = false) const override { return this->Mixin::String<Derived>::toQString(i18n); }
//! To std string
std::string toStdString(bool i18n = false) const { return this->convertToQString(i18n).toStdString(); }
//! \copydoc BlackMisc::Mixin::String::toStdString
using Mixin::String<Derived>::toStdString;
//! Update by variant map
//! \return number of values changed, with skipEqualValues equal values will not be changed
@@ -700,13 +725,13 @@ namespace BlackMisc
//! Copy assignment operator.
CValueObject &operator =(const CValueObject &) = default;
//! String for streaming operators
virtual QString stringForStreaming() const { return this->convertToQString(); }
//! \copydoc BlackMisc::Mixin::MetaType::getMetaTypeId
using Mixin::MetaType<Derived>::getMetaTypeId;
public:
//! \copydoc BlackMisc::Mixin::String::stringForStreaming
virtual QString stringForStreaming() const override { return this->Mixin::String<Derived>::stringForStreaming(); }
//! \copydoc BlackMisc::Mixin::DBusByTuple::marshallToDbus
using Mixin::DBusByTuple<Derived, Policy::DBus::IsMetaTuple<Derived, Base>::value>::marshallToDbus;