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Give code outside basic_json the reference tokens of a json_pointer

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detail::json_pointer_access returns the reference tokens of a pointer, so
that code resolving pointers without a basic_json value (such as the
zero-copy view) does not have to parse to_string() again. No change in
behavior.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-28 22:48:02 +02:00
parent 4d99fe92c6
commit a7ad17d274
2 changed files with 42 additions and 0 deletions
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21
include/nlohmann/detail/json_pointer.hpp
View File

@@ -30,6 +30,11 @@
NLOHMANN_JSON_NAMESPACE_BEGIN
namespace detail
{
struct json_pointer_access;
} // namespace detail
/// @brief JSON Pointer defines a string syntax for identifying a specific value within a JSON document
/// @sa https://json.nlohmann.me/api/json_pointer/
template<typename RefStringType>
@@ -42,6 +47,8 @@ class json_pointer
template<typename>
friend class json_pointer;
friend struct detail::json_pointer_access;
template<typename T>
struct string_t_helper
{
@@ -1164,4 +1171,18 @@ inline bool operator<(const json_pointer<RefStringTypeLhs>& lhs,
}
#endif
namespace detail
{
/// the reference tokens of a json_pointer, for code that resolves pointers
/// without a basic_json value (such as the zero-copy view)
struct json_pointer_access
{
template<typename RefStringType>
static const std::vector<typename json_pointer<RefStringType>::string_t>& reference_tokens(const json_pointer<RefStringType>& ptr) noexcept
{
return ptr.reference_tokens;
}
};
} // namespace detail
NLOHMANN_JSON_NAMESPACE_END

21
single_include/nlohmann/json.hpp
View File

@@ -20094,6 +20094,11 @@ NLOHMANN_JSON_NAMESPACE_END
NLOHMANN_JSON_NAMESPACE_BEGIN
namespace detail
{
struct json_pointer_access;
} // namespace detail
/// @brief JSON Pointer defines a string syntax for identifying a specific value within a JSON document
/// @sa https://json.nlohmann.me/api/json_pointer/
template<typename RefStringType>
@@ -20106,6 +20111,8 @@ class json_pointer
template<typename>
friend class json_pointer;
friend struct detail::json_pointer_access;
template<typename T>
struct string_t_helper
{
@@ -21228,6 +21235,20 @@ inline bool operator<(const json_pointer<RefStringTypeLhs>& lhs,
}
#endif
namespace detail
{
/// the reference tokens of a json_pointer, for code that resolves pointers
/// without a basic_json value (such as the zero-copy view)
struct json_pointer_access
{
template<typename RefStringType>
static const std::vector<typename json_pointer<RefStringType>::string_t>& reference_tokens(const json_pointer<RefStringType>& ptr) noexcept
{
return ptr.reference_tokens;
}
};
} // namespace detail
NLOHMANN_JSON_NAMESPACE_END
// #include <nlohmann/detail/json_ref.hpp>