161 lines
3.9 KiB
C++
161 lines
3.9 KiB
C++
#pragma once
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#ifndef _NB_SMARTSTREAM
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#define _NB_SMARTSTREAM
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#include <ostream>
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#include <type_traits>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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namespace nb {
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typedef std::pair<unsigned int, std::string> SmartTextKV;
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//template<typename T=std::string>
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struct SmartText {
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std::string msg;
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SmartTextKV kv = {0, ""};
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};
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typedef std::string (*SmartTextFormatter)(std::string, std::string);
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typedef std::unordered_map<unsigned int, SmartTextFormatter> SmartFormatMap;
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template <typename ST>
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class SmartOStreamBase {
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public:
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virtual void process(const SmartText&) = 0;
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static const SmartFormatMap Formatters;
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enum FormatterCodes : unsigned int;
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protected:
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SmartOStreamBase(ST& stream) : _ostream{&stream} {}
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ST* _ostream;
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};
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template<typename ST, typename Derived>
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class SmartOStreamBaseImpl;
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template<typename ST, typename Derived=void>
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class SmartOStream;
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template<typename ST, typename STD, typename Derived>
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class SmartOStreamBaseImpl<SmartOStream<ST, STD>, Derived> : public SmartOStreamBase<SmartOStream<ST, STD>>{
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using Base = SmartOStreamBase<SmartOStream<ST, STD>>;
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public:
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using StreamType = SmartOStream<ST, STD>;
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using Base::process;
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using Base::Formatters;
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protected:
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using Base::Base;
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};
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template<typename C, typename T, typename Derived>
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class SmartOStreamBaseImpl<std::basic_ostream<C, T>, Derived> : public SmartOStreamBase<std::basic_ostream<C, T>> {
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using Base = SmartOStreamBase<std::basic_ostream<C, T>>;
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public:
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using StreamType = std::basic_ostream<C, T>;
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using Base::process;
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using Base::Formatters;
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protected:
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using Base::Base;
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};
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template<typename StreamType, typename Derived>
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class SmartOStream : public SmartOStreamBaseImpl<StreamType, Derived> {
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template <typename ST, typename D, typename U>
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friend SmartOStream<ST, D>& operator<<(SmartOStream<ST, D>&, const U&);
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public:
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using Base = SmartOStreamBaseImpl<StreamType, Derived>;
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StreamType* getStream() const { return _ostream; }
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template <typename X>
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void process(const X& val) {
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*_ostream << val;
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}
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void process(const SmartText&);
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static const SmartFormatMap Formatters;
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protected:
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using Base::Base;
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using Base::_ostream;
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static std::string defaultFormatter(std::string msg, std::string fmt) {
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return msg;
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}
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};
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template<typename ST, typename D>
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enum SmartOStream<ST, D>::FormatterCodes : unsigned int {
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DEFAULT
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};
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template<typename ST, typename D>
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const SmartFormatMap SmartOStream<ST, D>::Formatters = {
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{SmartOStream<ST, D>::FormatterCodes::DEFAULT, defaultFormatter}
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};
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template <typename ST, typename D, typename U>
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SmartOStream<ST, D>& operator<<(SmartOStream<ST, D>& stream, const U& msg) {
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static_cast<D*>(&stream)->process(msg);
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return stream;
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}
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template <typename ST, typename U>
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SmartOStream<ST, void>& operator<<(SmartOStream<ST, void>& stream, const U& msg) {
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static_cast<SmartOStream<ST, void>*>(&stream)->process(msg);
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return stream;
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}
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template<typename ST, typename D>
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void SmartOStream<ST, D>::process(const SmartText& msg) {
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using Derived = typename std::conditional<std::is_void<D>::value, SmartOStream<ST, void>, D>::type;
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try {
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*_ostream << Derived::Formatters.at(msg.kv.first)(msg.msg, msg.kv.second);
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} catch (const std::out_of_range& e) {
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*_ostream << Derived::Formatters.at(0)(msg.msg, msg.kv.second);
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}
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}
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template<typename ST, typename D>
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class SmartTerminal : public SmartOStream<ST, SmartTerminal<ST, D>> {
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using Base = SmartOStream<ST, SmartTerminal<ST, D>>;
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public:
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using Base::Base;
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static const SmartFormatMap Formatters;
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enum FormatterCodes : unsigned int;
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protected:
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};
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template <typename ST, typename D>
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enum SmartTerminal<ST, D>::FormatterCodes : unsigned int {
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DEFAULT,
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COLOR,
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BACKGROUND,
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BOLD,
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CLEAR
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};
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{
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template<typename ST, typename D>
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const SmartTerminal<ST, D>::Formatters = {
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{SmartTerminal<ST>}
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};
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}
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}
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#endif // _NB_SMARTSTREAM
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