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Merge pull request #31858 from Enmk/DUMP_improvements

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Minor improvements to DUMP macro
This commit is contained in:
alexey-milovidov 2021-11-27 00:36:19 +03:00 committed by GitHub
commit f1c78a374b
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1 changed files with 21 additions and 2 deletions
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23
base/base/iostream_debug_helpers.h
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@ -6,6 +6,7 @@
#include <tuple>
#include <iomanip>
#include <iostream>
#include <magic_enum.hpp>
/** Usage:
*
@ -61,6 +62,13 @@ std::enable_if_t<priority == 2, Out> & dumpImpl(Out & out, T && x, std::decay_t<
}
template <int priority, typename Out, typename T>
std::enable_if_t<priority == 3 && std::is_enum_v<std::decay_t<T>>, Out> &
dumpImpl(Out & out, T && x)
{
return out << magic_enum::enum_name(x);
}
/// string and const char * - output not as container or pointer.
template <int priority, typename Out, typename T>
@ -131,15 +139,26 @@ Out & dumpValue(Out & out, T && x)
template <typename Out, typename T>
Out & dump(Out & out, const char * name, T && x)
{
// Dumping string literal, printing name and demangled type is irrelevant.
if constexpr (std::is_same_v<const char *, std::decay_t<std::remove_reference_t<T>>>)
{
const auto name_len = strlen(name);
const auto value_len = strlen(x);
// `name` is the same as quoted `x`
if (name_len > 2 && value_len > 0 && name[0] == '"' && name[name_len - 1] == '"'
&& strncmp(name + 1, x, std::min(value_len, name_len) - 1) == 0)
return out << x;
}
out << demangle(typeid(x).name()) << " " << name << " = ";
return dumpValue(out, x);
return dumpValue(out, x) << "; ";
}
#ifdef __clang__
#pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
#endif
#define DUMPVAR(VAR) ::dump(std::cerr, #VAR, (VAR)); std::cerr << "; ";
#define DUMPVAR(VAR) ::dump(std::cerr, #VAR, (VAR));
#define DUMPHEAD std::cerr << __FILE__ << ':' << __LINE__ << " [ " << getThreadId() << " ] ";
#define DUMPTAIL std::cerr << '\n';