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Add support for // and //=.

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Avoid if/elif/elif/else tests where the final else is supposed to
handle exactly one case instead of all other cases.  When the list of
operators is extended, the catchall else treats all new operators as
the last operator in the set of tests.  Instead, raise an exception if
an unexpected operator occurs.
This commit is contained in:
Jeremy Hylton 2001-08-29 18:12:30 +00:00
parent d4be10dc2c
commit 7abf520d6c
2 changed files with 32 additions and 10 deletions
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21
Lib/compiler/transformer.py
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@ -588,9 +588,11 @@ class Transformer:
if nodelist[i-1][0] == token.LEFTSHIFT:
node = LeftShift([node, right])
node.lineno = nodelist[1][2]
else:
elif nodelist[i-1][0] == token.RIGHTSHIFT:
node = RightShift([node, right])
node.lineno = nodelist[1][2]
else:
raise ValueError, "unexpected token: %s" % nodelist[i-1][0]
return node
def arith_expr(self, nodelist):
@ -600,9 +602,11 @@ class Transformer:
if nodelist[i-1][0] == token.PLUS:
node = Add([node, right])
node.lineno = nodelist[1][2]
else:
elif nodelist[i-1][0] == token.MINUS:
node = Sub([node, right])
node.lineno = nodelist[1][2]
else:
raise ValueError, "unexpected token: %s" % nodelist[i-1][0]
return node
def term(self, nodelist):
@ -614,8 +618,12 @@ class Transformer:
node = Mul([node, right])
elif t == token.SLASH:
node = Div([node, right])
else:
elif t == token.PERCENT:
node = Mod([node, right])
elif t == token.DOUBLESLASH:
node = FloorDiv([node, right])
else:
raise ValueError, "unexpected token: %s" % t
node.lineno = nodelist[1][2]
return node
@ -750,10 +758,13 @@ class Transformer:
if i < len(nodelist):
# should be DOUBLESTAR or STAR STAR
if nodelist[i][0] == token.DOUBLESTAR:
t = nodelist[i][0]
if t == token.DOUBLESTAR:
node = nodelist[i+1]
else:
elif t == token.STARSTAR:
node = nodelist[i+2]
else:
raise ValueError, "unexpected token: %s" % t
names.append(node[1])
flags = flags | CO_VARKEYWORDS