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GenericValue: add Erase function for object members

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This commit is contained in:
Philipp A. Hartmann 2014-07-31 12:47:02 +02:00
parent c0fcdcc478
commit 96af95c945
1 changed files with 35 additions and 0 deletions
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35
include/rapidjson/document.h
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@ -850,6 +850,7 @@ public:
/*! \param m member iterator (obtained by FindMember() or MemberBegin()).
\return the new iterator after removal.
\note Removing member is implemented by moving the last member. So the ordering of members is changed.
\note Use \ref Erase(ConstMemberIterator) instead, if you need to rely on a stable member ordering.
*/
MemberIterator RemoveMember(MemberIterator m) {
RAPIDJSON_ASSERT(IsObject());
@ -870,6 +871,40 @@ public:
return m;
}
//! Remove a member from an object by iterator.
/*! \param pos iterator to the member to remove
\pre IsObject() == true && \ref MemberBegin() <= \c pos < \ref MemberEnd()
\return Iterator following the removed element.
If the iterator \c pos refers to the last element, the \ref MemberEnd() iterator is returned.
\note Other than \ref RemoveMember(MemberIterator), this function preserves the ordering of the members.
*/
MemberIterator Erase(ConstMemberIterator pos) {
return Erase(pos, pos +1);
}
//! Remove members in the range [first, last) from an object.
/*! \param first iterator to the first member to remove
\param last iterator following the last member to remove
\pre IsObject() == true && \ref MemberBegin() <= \c first <= \c last <= \ref MemberEnd()
\return Iterator following the last removed element.
\note Other than \ref RemoveMember(MemberIterator), this function preserves the ordering of the members.
*/
MemberIterator Erase(ConstMemberIterator first, ConstMemberIterator last) {
RAPIDJSON_ASSERT(IsObject());
RAPIDJSON_ASSERT(data_.o.size > 0);
RAPIDJSON_ASSERT(data_.o.members != 0);
RAPIDJSON_ASSERT(first >= MemberBegin());
RAPIDJSON_ASSERT(first <= last);
RAPIDJSON_ASSERT(last <= MemberEnd());
MemberIterator pos = MemberBegin() + (first - MemberBegin());
for (MemberIterator itr = pos; ConstMemberIterator(itr) != last; ++itr)
itr->~Member();
memmove(&*pos, &*last, (ConstMemberIterator(MemberEnd()) - last) * sizeof(Member));
data_.o.size -= (last - first);
return pos;
}
//@}
//!@name Array