Add a property at the beginning of a property list.
MPlist* mplist_push (MPlist * plist, MSymbol key, void * val)
Add a property at the beginning of a property list. The mplist_push() function inserts at the beginning of property list plist a property whose key is key and value is val.
If key is a managing key, val must be a managed object. In this case, the reference count of val is incremented by one.
If the operation was successful, this function returns plist. Otherwise, it returns NULL.
Copyright (C) 2001 Information-technology Promotion Agency (IPA)
Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
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