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# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Converts the ternary conditional operator."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from tensorflow.python.autograph.core import converter
from tensorflow.python.autograph.pyct import templates
class ConditionalExpressionTransformer(converter.Base):
"""Converts contitional expressions to functional form."""
def visit_IfExp(self, node):
return templates.replace_as_expression(
'ag__.if_stmt(test, lambda: true_expr, lambda: false_expr)',
test=node.test,
true_expr=node.body,
false_expr=node.orelse)
def transform(node, ctx):
node = ConditionalExpressionTransformer(ctx).visit(node)
return node
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