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5.7.4. Information Updating
If the source code of a project is edited the information about the
location of the affected symbols is updated immediately. On saving a
file its symbolic information is extracted anew and all browsing
tools are updated. A user, therefore, works always with symbol based
tools presenting him information that correctly mirrors the source
code without ever having to bother about the effects of his changes.
Sniff can not know when a source file was changed with another tool
while its symbolic information was loaded. In this case the
developer has to tell Sniff to update its symbol table.