json-validator/include/jvalidate/detail/debug.h

#pragma once
#if !defined(NDEBUG) && defined(JVALIDATE_TRACE)
#include <iostream>
#include <map>
#include <source_location>
#include <string_view>

#include <jvalidate/_macro.h>
#include <jvalidate/detail/on_block_exit.h>

namespace jvalidate::detail {
template <typename K, typename V>
std::ostream & operator<<(std::ostream & os, std::map<K, V> const & value) {
  os << '{';
  std::string_view div;
  for (auto const & [k, v] : value) {
    os << std::exchange(div, ", ") << k << ':' << ' ' << v;
  }
  return os << '}';
}

template <typename V> std::ostream & operator<<(std::ostream & os, std::vector<V> const & value) {
  os << '[';
  std::string_view div;
  for (auto const & v : value) {
    os << std::exchange(div, ", ") << v;
  }
  return os << ']';
}

template <typename V> std::ostream & operator<<(std::ostream & os, std::set<V> const & value) {
  os << '[';
  std::string_view div;
  for (auto const & v : value) {
    os << std::exchange(div, ", ") << v;
  }
  return os << ']';
}
}

namespace jvalidate::detail {
inline size_t g_debug_trace_depth = 0;
}

#define JVALIDATE_NAME(x) JVALIDATE_CONCAT(__, JVALIDATE_CONCAT(x, __LINE__))

#define JVALIDATE_DEBUG(expression)                                                                \
  do {                                                                                             \
    using ::jvalidate::detail::operator<<;                                                         \
    auto JVALIDATE_NAME(here) = std::source_location::current();                                   \
    std::string_view JVALIDATE_NAME(fname) = JVALIDATE_NAME(here).file_name();                     \
    JVALIDATE_NAME(fname).remove_prefix(JVALIDATE_NAME(fname).find_last_of('/') + 1);              \
    std::cerr << std::string(2 * ::jvalidate::detail::g_depth, ' ') << JVALIDATE_NAME(fname)       \
              << ':' << JVALIDATE_NAME(here).line() << ' ' << expression << std::endl;             \
  } while (false)

#define JVALIDATE_DEBUG_INDENTED_SCOPE()                                                           \
  ::jvalidate::detail::OnBlockExit JVALIDATE_NAME(indent_scope) =                                  \
      (++::jvalidate::detail::g_debug_trace_depth,                                                 \
       []() { --::jvalidate::detail::g_debug_trace_depth; })
#else

#define JVALIDATE_DEBUG(...)
#define JVALIDATE_DEBUG_INDENTED_SCOPE()

#endif