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allow push_back() and pop_back() calls on json_pointer

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Putting pop_back() to public and creating a trivial push_back()
method allows users of nlohmann::json_pointer to manipulate an
existing json-pointer by adding or removing keys at the end.

This is useful for traversing a JSON-instance and keeping track
of its "absolute path" at any moment.

In my case for a schema-validator error-handler.
This commit is contained in:
Patrick Boettcher
2019-01-15 14:39:06 +01:00
parent e5753b14a8
commit 9225cf2f57
3 changed files with 74 additions and 2 deletions
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11
single_include/nlohmann/json.hpp
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@ -11885,7 +11885,6 @@ class json_pointer
return res;
}
private:
/*!
@brief remove and return last reference pointer
@throw out_of_range.405 if JSON pointer has no parent
@ -11902,6 +11901,16 @@ class json_pointer
return last;
}
/*!
@brief remove and return last reference pointer
@throw out_of_range.405 if JSON pointer has no parent
*/
void push_back(const std::string& tok)
{
reference_tokens.push_back(tok);
}
private:
/// return whether pointer points to the root document
bool is_root() const noexcept
{