10a8c90248264a8b26970b4473770bcc3df8515fJosh Gao# Copyright 2006 Google, Inc. All Rights Reserved.
20a8c90248264a8b26970b4473770bcc3df8515fJosh Gao# Licensed to PSF under a Contributor Agreement.
30a8c90248264a8b26970b4473770bcc3df8515fJosh Gao
40a8c90248264a8b26970b4473770bcc3df8515fJosh Gao"""Fixer for apply().
50a8c90248264a8b26970b4473770bcc3df8515fJosh Gao
60a8c90248264a8b26970b4473770bcc3df8515fJosh GaoThis converts apply(func, v, k) into (func)(*v, **k)."""
70a8c90248264a8b26970b4473770bcc3df8515fJosh Gao
80a8c90248264a8b26970b4473770bcc3df8515fJosh Gao# Local imports
90a8c90248264a8b26970b4473770bcc3df8515fJosh Gaofrom .. import pytree
100a8c90248264a8b26970b4473770bcc3df8515fJosh Gaofrom ..pgen2 import token
110a8c90248264a8b26970b4473770bcc3df8515fJosh Gaofrom .. import fixer_base
120a8c90248264a8b26970b4473770bcc3df8515fJosh Gaofrom ..fixer_util import Call, Comma, parenthesize
130a8c90248264a8b26970b4473770bcc3df8515fJosh Gao
140a8c90248264a8b26970b4473770bcc3df8515fJosh Gaoclass FixApply(fixer_base.BaseFix):
150a8c90248264a8b26970b4473770bcc3df8515fJosh Gao    BM_compatible = True
160a8c90248264a8b26970b4473770bcc3df8515fJosh Gao
170a8c90248264a8b26970b4473770bcc3df8515fJosh Gao    PATTERN = """
180a8c90248264a8b26970b4473770bcc3df8515fJosh Gao    power< 'apply'
190a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        trailer<
200a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            '('
210a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            arglist<
220a8c90248264a8b26970b4473770bcc3df8515fJosh Gao                (not argument<NAME '=' any>) func=any ','
230a8c90248264a8b26970b4473770bcc3df8515fJosh Gao                (not argument<NAME '=' any>) args=any [','
240a8c90248264a8b26970b4473770bcc3df8515fJosh Gao                (not argument<NAME '=' any>) kwds=any] [',']
250a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            >
260a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            ')'
270a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        >
280a8c90248264a8b26970b4473770bcc3df8515fJosh Gao    >
290a8c90248264a8b26970b4473770bcc3df8515fJosh Gao    """
300a8c90248264a8b26970b4473770bcc3df8515fJosh Gao
310a8c90248264a8b26970b4473770bcc3df8515fJosh Gao    def transform(self, node, results):
320a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        syms = self.syms
330a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        assert results
340a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        func = results["func"]
350a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        args = results["args"]
360a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        kwds = results.get("kwds")
370a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        prefix = node.prefix
380a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        func = func.clone()
390a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        if (func.type not in (token.NAME, syms.atom) and
400a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            (func.type != syms.power or
410a8c90248264a8b26970b4473770bcc3df8515fJosh Gao             func.children[-2].type == token.DOUBLESTAR)):
420a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            # Need to parenthesize
430a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            func = parenthesize(func)
440a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        func.prefix = ""
450a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        args = args.clone()
460a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        args.prefix = ""
470a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        if kwds is not None:
480a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            kwds = kwds.clone()
490a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            kwds.prefix = ""
500a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        l_newargs = [pytree.Leaf(token.STAR, u"*"), args]
510a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        if kwds is not None:
520a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            l_newargs.extend([Comma(),
530a8c90248264a8b26970b4473770bcc3df8515fJosh Gao                              pytree.Leaf(token.DOUBLESTAR, u"**"),
540a8c90248264a8b26970b4473770bcc3df8515fJosh Gao                              kwds])
550a8c90248264a8b26970b4473770bcc3df8515fJosh Gao            l_newargs[-2].prefix = u" " # that's the ** token
560a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        # XXX Sometimes we could be cleverer, e.g. apply(f, (x, y) + t)
570a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        # can be translated into f(x, y, *t) instead of f(*(x, y) + t)
580a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        #new = pytree.Node(syms.power, (func, ArgList(l_newargs)))
590a8c90248264a8b26970b4473770bcc3df8515fJosh Gao        return Call(func, l_newargs, prefix=prefix)
60