Detecting mismatched parens better

[Christopher C. Stacy <CStacy at MIT-AI>]

    Date: 20 January 1982 22:22-EST
    From: Richard M. Stallman <RMS at MIT-AI>
    Subject: Detecting mismatched parens better

    The idea of checking parens while saving the file is interesting.
    Would someone like to implement this so we can see whether it solves
    the problem?  There can be a switch to turn on the feature, which
    could be overridden by a file property, and ultimately a poll to
    choose the default for the switch.

Couldn't this be done with a hook on the Save Buffer function which
runs Find Unbalanced Parenthesis?