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Change all default=Nones to False or alternative #50

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seporaitis opened this issue Aug 10, 2017 · 0 comments
Open

Change all default=Nones to False or alternative #50

seporaitis opened this issue Aug 10, 2017 · 0 comments
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Turns out that setParseAction callback is unable to return None as a default:

A parse action can modify the result (the toks argument) by returning the modified list. If it returns None, the result is not changed.

Which means that when the callback returns None - the parse result is an empty pyparsing.ParseResults instance.

Quite an annoying issue.
@seporaitis seporaitis self-assigned this Aug 10, 2017
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