projects / config.git / blame
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| 53e6db90 DC |
1 | # Copyright 2018 Google Inc. All Rights Reserved. |
| 2 | # | |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 | # you may not use this file except in compliance with the License. | |
| 5 | # You may obtain a copy of the License at | |
| 6 | # | |
| 7 | # http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 | # | |
| 9 | # Unless required by applicable law or agreed to in writing, software | |
| 10 | # distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 | # See the License for the specific language governing permissions and | |
| 13 | # limitations under the License. | |
| 14 | """Identify containers for lib2to3 trees. | |
| 15 | ||
| 16 | This module identifies containers and the elements in them. Each element points | |
| 17 | to the opening bracket and vice-versa. | |
| 18 | ||
| 19 | IdentifyContainers(): the main function exported by this module. | |
| 20 | """ | |
| 21 | ||
| 22 | from yapf_third_party._ylib2to3.pgen2 import token as grammar_token | |
| 23 | ||
| 24 | from yapf.pytree import pytree_utils | |
| 25 | from yapf.pytree import pytree_visitor | |
| 26 | ||
| 27 | ||
| 28 | def IdentifyContainers(tree): | |
| 29 | """Run the identify containers visitor over the tree, modifying it in place. | |
| 30 | ||
| 31 | Arguments: | |
| 32 | tree: the top-level pytree node to annotate with subtypes. | |
| 33 | """ | |
| 34 | identify_containers = _IdentifyContainers() | |
| 35 | identify_containers.Visit(tree) | |
| 36 | ||
| 37 | ||
| 38 | class _IdentifyContainers(pytree_visitor.PyTreeVisitor): | |
| 39 | """_IdentifyContainers - see file-level docstring for detailed description.""" | |
| 40 | ||
| 41 | def Visit_trailer(self, node): # pylint: disable=invalid-name | |
| 42 | for child in node.children: | |
| 43 | self.Visit(child) | |
| 44 | ||
| 45 | if len(node.children) != 3: | |
| 46 | return | |
| 47 | if node.children[0].type != grammar_token.LPAR: | |
| 48 | return | |
| 49 | ||
| 50 | if pytree_utils.NodeName(node.children[1]) == 'arglist': | |
| 51 | for child in node.children[1].children: | |
| 52 | pytree_utils.SetOpeningBracket( | |
| 53 | pytree_utils.FirstLeafNode(child), node.children[0]) | |
| 54 | else: | |
| 55 | pytree_utils.SetOpeningBracket( | |
| 56 | pytree_utils.FirstLeafNode(node.children[1]), node.children[0]) | |
| 57 | ||
| 58 | def Visit_atom(self, node): # pylint: disable=invalid-name | |
| 59 | for child in node.children: | |
| 60 | self.Visit(child) | |
| 61 | ||
| 62 | if len(node.children) != 3: | |
| 63 | return | |
| 64 | if node.children[0].type != grammar_token.LPAR: | |
| 65 | return | |
| 66 | ||
| 67 | for child in node.children[1].children: | |
| 68 | pytree_utils.SetOpeningBracket( | |
| 69 | pytree_utils.FirstLeafNode(child), node.children[0]) |