WriteStructContext treats state of fs

modules/core/include/opencv2/core/persistence.hpp

@@ -697,9 +697,8 @@ void write(FileStorage& fs, const String& name, const Range& r )
 template<typename _Tp> static inline
 void write( FileStorage& fs, const String& name, const std::vector<_Tp>& vec )
 {
-    fs << (DataType<_Tp>::fmt != 0 ? "[:" : "[");
+    internal::WriteStructContext ws(fs, name, FileNode::SEQ+(DataType<_Tp>::fmt != 0 ? FileNode::FLOW : 0));
     write(fs, vec);
-    fs << "]";
 }
 
 static inline

modules/core/src/persistence.cpp

@@ -5486,11 +5486,28 @@ internal::WriteStructContext::WriteStructContext(FileStorage& _fs,
 {
     cvStartWriteStruct(**fs, !name.empty() ? name.c_str() : 0, flags,
                        !typeName.empty() ? typeName.c_str() : 0);
+    if ((flags & FileNode::TYPE_MASK) == FileNode::SEQ)
+    {
+        fs->elname = String();
+        fs->state = FileStorage::VALUE_EXPECTED;
+        fs->structs.push_back('[');
+    }
+    else
+    {
+        fs->elname = String();
+        fs->state = FileStorage::NAME_EXPECTED + FileStorage::INSIDE_MAP;
+        fs->structs.push_back('{');
+    }
 }
 
 internal::WriteStructContext::~WriteStructContext()
 {
     cvEndWriteStruct(**fs);
+    fs->structs.pop_back();
+    fs->state = fs->structs.empty() || fs->structs.back() == '{' ?
+        FileStorage::NAME_EXPECTED + FileStorage::INSIDE_MAP :
+        FileStorage::VALUE_EXPECTED;
+    fs->elname = String();
 }