| 1 | n/a | # Copyright 2006 Google, Inc. All Rights Reserved. |
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| 2 | n/a | # Licensed to PSF under a Contributor Agreement. |
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| 3 | n/a | |
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| 4 | n/a | """Fixer for apply(). |
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| 5 | n/a | |
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| 6 | n/a | This converts apply(func, v, k) into (func)(*v, **k).""" |
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| 7 | n/a | |
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| 8 | n/a | # Local imports |
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| 9 | n/a | from .. import pytree |
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| 10 | n/a | from ..pgen2 import token |
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| 11 | n/a | from .. import fixer_base |
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| 12 | n/a | from ..fixer_util import Call, Comma, parenthesize |
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| 13 | n/a | |
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| 14 | n/a | class FixApply(fixer_base.BaseFix): |
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| 15 | n/a | BM_compatible = True |
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| 16 | n/a | |
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| 17 | n/a | PATTERN = """ |
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| 18 | n/a | power< 'apply' |
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| 19 | n/a | trailer< |
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| 20 | n/a | '(' |
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| 21 | n/a | arglist< |
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| 22 | n/a | (not argument<NAME '=' any>) func=any ',' |
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| 23 | n/a | (not argument<NAME '=' any>) args=any [',' |
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| 24 | n/a | (not argument<NAME '=' any>) kwds=any] [','] |
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| 25 | n/a | > |
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| 26 | n/a | ')' |
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| 27 | n/a | > |
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| 28 | n/a | > |
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| 29 | n/a | """ |
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| 30 | n/a | |
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| 31 | n/a | def transform(self, node, results): |
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| 32 | n/a | syms = self.syms |
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| 33 | n/a | assert results |
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| 34 | n/a | func = results["func"] |
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| 35 | n/a | args = results["args"] |
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| 36 | n/a | kwds = results.get("kwds") |
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| 37 | n/a | # I feel like we should be able to express this logic in the |
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| 38 | n/a | # PATTERN above but I don't know how to do it so... |
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| 39 | n/a | if args: |
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| 40 | n/a | if args.type == self.syms.star_expr: |
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| 41 | n/a | return # Make no change. |
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| 42 | n/a | if (args.type == self.syms.argument and |
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| 43 | n/a | args.children[0].value == '**'): |
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| 44 | n/a | return # Make no change. |
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| 45 | n/a | if kwds and (kwds.type == self.syms.argument and |
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| 46 | n/a | kwds.children[0].value == '**'): |
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| 47 | n/a | return # Make no change. |
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| 48 | n/a | prefix = node.prefix |
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| 49 | n/a | func = func.clone() |
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| 50 | n/a | if (func.type not in (token.NAME, syms.atom) and |
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| 51 | n/a | (func.type != syms.power or |
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| 52 | n/a | func.children[-2].type == token.DOUBLESTAR)): |
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| 53 | n/a | # Need to parenthesize |
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| 54 | n/a | func = parenthesize(func) |
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| 55 | n/a | func.prefix = "" |
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| 56 | n/a | args = args.clone() |
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| 57 | n/a | args.prefix = "" |
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| 58 | n/a | if kwds is not None: |
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| 59 | n/a | kwds = kwds.clone() |
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| 60 | n/a | kwds.prefix = "" |
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| 61 | n/a | l_newargs = [pytree.Leaf(token.STAR, "*"), args] |
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| 62 | n/a | if kwds is not None: |
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| 63 | n/a | l_newargs.extend([Comma(), |
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| 64 | n/a | pytree.Leaf(token.DOUBLESTAR, "**"), |
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| 65 | n/a | kwds]) |
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| 66 | n/a | l_newargs[-2].prefix = " " # that's the ** token |
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| 67 | n/a | # XXX Sometimes we could be cleverer, e.g. apply(f, (x, y) + t) |
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| 68 | n/a | # can be translated into f(x, y, *t) instead of f(*(x, y) + t) |
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| 69 | n/a | #new = pytree.Node(syms.power, (func, ArgList(l_newargs))) |
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| 70 | n/a | return Call(func, l_newargs, prefix=prefix) |
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