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Merge branch 'feature/json_pointer_contains' into develop

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Niels Lohmann
2019-07-09 08:08:56 +02:00
parent 7a23aa1c0d 258fa798f1
commit 104c5c1996
7 changed files with 338 additions and 23 deletions
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37
include/nlohmann/json.hpp
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@ -4001,15 +4001,48 @@ class basic_json
@liveexample{The following code shows an example for `contains()`.,contains}
@sa @ref find(KeyT&&) -- returns an iterator to an object element
@sa @ref contains(const json_pointer&) const -- checks the existence for a JSON pointer
@since version 3.6.0
*/
template<typename KeyT>
bool contains(KeyT&& key) const
template<typename KeyT, typename std::enable_if<
not std::is_same<KeyT, json_pointer>::value, int>::type = 0>
bool contains(KeyT && key) const
{
return is_object() and m_value.object->find(std::forward<KeyT>(key)) != m_value.object->end();
}
/*!
@brief check the existence of an element in a JSON object given a JSON pointer
Check wehther the given JSON pointer @a ptr can be resolved in the current
JSON value.
@note This method can be executed on any JSON value type.
@param[in] ptr JSON pointer to check its existence.
@return true if the JSON pointer can be resolved to a stored value, false
otherwise.
@post If `j.contains(ptr)` returns true, it is safe to call `j[ptr]`.
@throw parse_error.106 if an array index begins with '0'
@throw parse_error.109 if an array index was not a number
@complexity Logarithmic in the size of the JSON object.
@liveexample{The following code shows an example for `contains()`.,contains_json_pointer}
@sa @ref contains(KeyT &&) const -- checks the existence of a key
@since version 3.7.0
*/
bool contains(const json_pointer& ptr) const
{
return ptr.contains(this);
}
/// @}