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167 lines
5.4 KiB
C++
167 lines
5.4 KiB
C++
#pragma once
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#include "demangle.h"
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#include "getThreadNumber.h"
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#include <type_traits>
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#include <tuple>
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#include <iomanip>
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#include <iostream>
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/** Usage:
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*
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* DUMP(variable...)
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*/
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template <typename Out, typename T>
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Out & dumpValue(Out &, T &&);
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/// Catch-all case.
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == -1, Out> & dumpImpl(Out & out, T &&)
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{
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return out << "{...}";
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}
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/// An object, that could be output with operator <<.
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == 0, Out> & dumpImpl(Out & out, T && x, std::decay_t<decltype(std::declval<Out &>() << std::declval<T>())> * = nullptr)
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{
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return out << x;
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}
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/// A pointer-like object.
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == 1
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/// Protect from the case when operator * do effectively nothing (function pointer).
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&& !std::is_same_v<std::decay_t<T>, std::decay_t<decltype(*std::declval<T>())>>
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, Out> & dumpImpl(Out & out, T && x, std::decay_t<decltype(*std::declval<T>())> * = nullptr)
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{
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if (!x)
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return out << "nullptr";
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return dumpValue(out, *x);
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}
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/// Container.
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == 2, Out> & dumpImpl(Out & out, T && x, std::decay_t<decltype(std::begin(std::declval<T>()))> * = nullptr)
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{
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bool first = true;
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out << "{";
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for (const auto & elem : x)
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{
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if (first)
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first = false;
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else
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out << ", ";
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dumpValue(out, elem);
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}
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return out << "}";
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}
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/// string and const char * - output not as container or pointer.
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == 3 && (std::is_same_v<std::decay_t<T>, std::string> || std::is_same_v<std::decay_t<T>, const char *>), Out> &
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dumpImpl(Out & out, T && x)
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{
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return out << std::quoted(x);
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}
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/// UInt8 - output as number, not char.
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == 3 && std::is_same_v<std::decay_t<T>, unsigned char>, Out> &
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dumpImpl(Out & out, T && x)
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{
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return out << int(x);
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}
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/// Tuple, pair
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template <size_t N, typename Out, typename T>
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Out & dumpTupleImpl(Out & out, T && x)
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{
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if constexpr (N == 0)
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out << "{";
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else
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out << ", ";
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dumpValue(out, std::get<N>(x));
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if constexpr (N + 1 == std::tuple_size_v<std::decay_t<T>>)
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out << "}";
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else
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dumpTupleImpl<N + 1>(out, x);
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return out;
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}
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template <int priority, typename Out, typename T>
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std::enable_if_t<priority == 4, Out> & dumpImpl(Out & out, T && x, std::decay_t<decltype(std::get<0>(std::declval<T>()))> * = nullptr)
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{
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return dumpTupleImpl<0>(out, x);
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}
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template <int priority, typename Out, typename T>
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Out & dumpDispatchPriorities(Out & out, T && x, std::decay_t<decltype(dumpImpl<priority>(std::declval<Out &>(), std::declval<T>()))> *)
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{
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return dumpImpl<priority>(out, x);
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}
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struct LowPriority { LowPriority(void *) {} };
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template <int priority, typename Out, typename T>
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Out & dumpDispatchPriorities(Out & out, T && x, LowPriority)
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{
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return dumpDispatchPriorities<priority - 1>(out, x, nullptr);
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}
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template <typename Out, typename T>
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Out & dumpValue(Out & out, T && x)
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{
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return dumpDispatchPriorities<5>(out, x, nullptr);
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}
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template <typename Out, typename T>
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Out & dump(Out & out, const char * name, T && x)
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{
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out << demangle(typeid(x).name()) << " " << name << " = ";
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return dumpValue(out, x);
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}
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#ifdef __clang__
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#pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
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#endif
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#define DUMPVAR(VAR) dump(std::cerr, #VAR, (VAR)); std::cerr << "; ";
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#define DUMPHEAD std::cerr << __FILE__ << ':' << __LINE__ << " [ " << getThreadNumber() << " ] ";
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#define DUMPTAIL std::cerr << '\n';
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#define DUMP1(V1) do { DUMPHEAD DUMPVAR(V1) DUMPTAIL } while(0)
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#define DUMP2(V1, V2) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPTAIL } while(0)
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#define DUMP3(V1, V2, V3) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPTAIL } while(0)
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#define DUMP4(V1, V2, V3, V4) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPVAR(V4) DUMPTAIL } while(0)
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#define DUMP5(V1, V2, V3, V4, V5) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPVAR(V4) DUMPVAR(V5) DUMPTAIL } while(0)
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#define DUMP6(V1, V2, V3, V4, V5, V6) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPVAR(V4) DUMPVAR(V5) DUMPVAR(V6) DUMPTAIL } while(0)
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#define DUMP7(V1, V2, V3, V4, V5, V6, V7) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPVAR(V4) DUMPVAR(V5) DUMPVAR(V6) DUMPVAR(V7) DUMPTAIL } while(0)
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#define DUMP8(V1, V2, V3, V4, V5, V6, V7, V8) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPVAR(V4) DUMPVAR(V5) DUMPVAR(V6) DUMPVAR(V7) DUMPVAR(V8) DUMPTAIL } while(0)
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#define DUMP9(V1, V2, V3, V4, V5, V6, V7, V8, V9) do { DUMPHEAD DUMPVAR(V1) DUMPVAR(V2) DUMPVAR(V3) DUMPVAR(V4) DUMPVAR(V5) DUMPVAR(V6) DUMPVAR(V7) DUMPVAR(V8) DUMPVAR(V9) DUMPTAIL } while(0)
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/// https://groups.google.com/forum/#!searchin/kona-dev/variadic$20macro%7Csort:date/kona-dev/XMA-lDOqtlI/GCzdfZsD41sJ
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#define VA_NUM_ARGS_IMPL(x1, x2, x3, x4, x5, x6, x7, x8, x9, N, ...) N
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#define VA_NUM_ARGS(...) VA_NUM_ARGS_IMPL(__VA_ARGS__, 9, 8, 7, 6, 5, 4, 3, 2, 1)
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#define MAKE_VAR_MACRO_IMPL_CONCAT(PREFIX, NUM_ARGS) PREFIX ## NUM_ARGS
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#define MAKE_VAR_MACRO_IMPL(PREFIX, NUM_ARGS) MAKE_VAR_MACRO_IMPL_CONCAT(PREFIX, NUM_ARGS)
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#define MAKE_VAR_MACRO(PREFIX, ...) MAKE_VAR_MACRO_IMPL(PREFIX, VA_NUM_ARGS(__VA_ARGS__))
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#define DUMP(...) MAKE_VAR_MACRO(DUMP, __VA_ARGS__)(__VA_ARGS__)
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