wehub-resource-sync
75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
# Copyright (c) 2016, Serge Guelton
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# All rights reserved.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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# Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# Neither the name of HPCProject, Serge Guelton nor the names of its
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# contributors may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# NOTE(paddle-dev): We introduce third-party library Gast as unified AST
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# representation. See https://github.com/serge-sans-paille/gast for details.
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import ast
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from . import gast
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def _generate_translators(to):
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class Translator(ast.NodeTransformer):
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def _visit(self, node):
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if isinstance(node, ast.AST):
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return self.visit(node)
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elif isinstance(node, list):
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return [self._visit(n) for n in node]
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else:
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return node
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def generic_visit(self, node):
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class_name = type(node).__name__
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if not hasattr(to, class_name):
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# handle nodes that are not part of the AST
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return
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cls = getattr(to, class_name)
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new_node = cls(
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**{
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field: self._visit(getattr(node, field))
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for field in node._fields
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if hasattr(node, field)
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}
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)
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for attr in node._attributes:
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try:
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setattr(new_node, attr, getattr(node, attr))
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except AttributeError:
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pass
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return new_node
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return Translator
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AstToGAst = _generate_translators(gast)
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GAstToAst = _generate_translators(ast)
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