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- # Copyright 2006 Google, Inc. All Rights Reserved.
- # Licensed to PSF under a Contributor Agreement.
-
- """Fixer for apply().
-
- This converts apply(func, v, k) into (func)(*v, **k)."""
-
- # Local imports
- from .. import pytree
- from ..pgen2 import token
- from .. import fixer_base
- from ..fixer_util import Call, Comma
-
- class FixApply(fixer_base.BaseFix):
-
- PATTERN = """
- power< 'apply'
- trailer<
- '('
- arglist<
- (not argument<NAME '=' any>) func=any ','
- (not argument<NAME '=' any>) args=any [','
- (not argument<NAME '=' any>) kwds=any] [',']
- >
- ')'
- >
- >
- """
-
- def transform(self, node, results):
- syms = self.syms
- assert results
- func = results["func"]
- args = results["args"]
- kwds = results.get("kwds")
- prefix = node.get_prefix()
- func = func.clone()
- if (func.type not in (token.NAME, syms.atom) and
- (func.type != syms.power or
- func.children[-2].type == token.DOUBLESTAR)):
- # Need to parenthesize
- func = self.parenthesize(func)
- func.set_prefix("")
- args = args.clone()
- args.set_prefix("")
- if kwds is not None:
- kwds = kwds.clone()
- kwds.set_prefix("")
- l_newargs = [pytree.Leaf(token.STAR, "*"), args]
- if kwds is not None:
- l_newargs.extend([Comma(),
- pytree.Leaf(token.DOUBLESTAR, "**"),
- kwds])
- l_newargs[-2].set_prefix(" ") # that's the ** token
- # XXX Sometimes we could be cleverer, e.g. apply(f, (x, y) + t)
- # can be translated into f(x, y, *t) instead of f(*(x, y) + t)
- #new = pytree.Node(syms.power, (func, ArgList(l_newargs)))
- return Call(func, l_newargs, prefix=prefix)
-