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87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
#pragma once
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#include <string>
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#include <vector>
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#include <nlohmann/detail/value_t.hpp>
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#include <nlohmann/detail/string_escape.hpp>
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namespace nlohmann
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{
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namespace detail
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{
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template<typename BasicJsonType>
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class diagnostics_t
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{
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public:
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diagnostics_t() noexcept = default;
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diagnostics_t(const BasicJsonType& j) noexcept
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: m_j(&j)
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{}
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std::string diagnostics() const
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{
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#if JSON_DIAGNOSTICS
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if (m_j == nullptr)
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{
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return "";
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}
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std::vector<std::string> tokens;
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for (const auto* current = m_j; current->m_parent != nullptr; current = current->m_parent)
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{
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switch (current->m_parent->type())
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{
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case value_t::array:
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{
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for (std::size_t i = 0; i < current->m_parent->m_value.array->size(); ++i)
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{
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if (current->m_parent->m_value.array->operator[](i) == *current)
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{
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tokens.emplace_back(std::to_string(i));
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break;
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}
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}
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break;
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}
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case value_t::object:
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{
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for (const auto& element : *current->m_parent->m_value.object)
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{
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if (element.second == *current)
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{
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tokens.emplace_back(element.first.c_str());
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break;
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}
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}
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break;
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}
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default: // LCOV_EXCL_LINE
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break; // LCOV_EXCL_LINE
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}
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}
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if (tokens.empty())
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{
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return ""; // LCOV_EXCL_LINE
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}
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return "(" + std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
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[](const std::string & a, const std::string & b)
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{
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return a + "/" + detail::escape(b);
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}) + ") ";
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#else
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return "";
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#endif
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}
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private:
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const BasicJsonType* m_j = nullptr;
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};
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} // namespace detail
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} // namespace nlohmann
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