**** SPECIAL CAUTION TO DEVELOPERS ****
The strings that represent attribute key names like "name",
"sym:name", "type", and so forth are extensively shared to save
memory. If a key name is modified for some reason (which is not
recommended), be aware that those change may affect thousands of parse
tree nodes. Moreover, changes to a key name will break the hashing
algorithm used to perform attribute lookup.
Bottom line: don't modify hash table key strings.
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@4618 626c5289-ae23-0410-ae9c-e8d60b6d4f22
