[Python-Dev] Can Python implementations reject semantically invalid expressions?
Steven D'Aprano
steve at pearwood.info
Fri Jul 2 06:28:47 CEST 2010
This question was inspired by something asked on #python today. Consider
it a hypothetical, not a serious proposal.
We know that many semantic errors in Python lead to runtime errors, e.g.
1 + "1". If an implementation rejected them at compile time, would it
still be Python? E.g. if the keyhole optimizer raised SyntaxError (or
some other exception) on seeing this:
def f():
return 1 + "1"
instead of compiling something which can't fail to raise an exception,
would that still be a legal Python implementation?
--
Steven D'Aprano
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