lib/json
1
0
Fork 0
mirror of https://github.com/nlohmann/json.git synced 2025-07-28 12:02:00 +03:00
Code Activity

✨ make emplace_back return a reference #1609

Browse Source
This commit is contained in:
Niels Lohmann
2019-06-30 12:19:41 +02:00
parent 9a775bcb14
commit 1be63431f3
3 changed files with 26 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
single_include/nlohmann/json.hpp
View File

@ -17763,6 +17763,8 @@ class basic_json
@param[in] args arguments to forward to a constructor of @ref basic_json
@tparam Args compatible types to create a @ref basic_json object
@return reference to the inserted element
@throw type_error.311 when called on a type other than JSON array or
null; example: `"cannot use emplace_back() with number"`
@ -17772,10 +17774,10 @@ class basic_json
elements to a JSON array. Note how the `null` value was silently converted
to a JSON array.,emplace_back}
@since version 2.0.8
@since version 2.0.8, returns reference since 3.7.0
*/
template<class... Args>
void emplace_back(Args&& ... args)
reference emplace_back(Args&& ... args)
{
// emplace_back only works for null objects or arrays
if (JSON_UNLIKELY(not(is_null() or is_array())))
@ -17792,7 +17794,12 @@ class basic_json
}
// add element to array (perfect forwarding)
#ifdef JSON_HAS_CPP_17
return m_value.array->emplace_back(std::forward<Args>(args)...);
#else
m_value.array->emplace_back(std::forward<Args>(args)...);
return m_value.array->back();
#endif
}
/*!