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removing unnecessary restrictions in recognizing the configuration data #4
With the current version of
These options are not enough when a user wants to preset the configuration data but still wants to allow other sections and variables accepted. In addtion to it, a user (not the library) might want to check if a given section or variable should be accepted; for example, consider a configuration file where a variable specifies what forms of sections should be accepted:
To support this it should be possible for a user to register a callback function that is invoked whenever a non-preset section or variable is encountered.