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Assert that it can't be key where we say it can't, and that it is integer where we say it must.

Adjust some comments.
This commit is contained in:
Sei Lisa 2018-06-02 17:28:09 +02:00
parent a33dc8540f
commit ac254efb77
1 changed files with 7 additions and 2 deletions
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7
lslopt/lslfoldconst.py
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@ -857,9 +857,11 @@ class foldconst(object):
return
# Can't be key, as no combo of addition operands returns key
assert optype != 'key'
if optype in ('string', 'float', 'list'):
# All these types evaluate to boolean False when they are
# the neutral addition element.
if optype in ('string', 'float', 'list'):
if lnt == 'CONST' and not lval.value:
# 0. + expr -> expr
# "" + expr -> expr
@ -928,12 +930,15 @@ class foldconst(object):
type(lval.value)]
return
# Nothing else to do with addition of float, string or list
return
# Must be two integers. This allows for a number of
# optimizations. First the most obvious ones.
assert optype == 'integer' # just to make sure
if lnt == 'CONST' and lval.value == 0:
# 0 + x = x
parent[index] = rval
return