96 lines
2.4 KiB
Python
96 lines
2.4 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from yaql.language.engine import parameter
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def _is_a_number(value):
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return isinstance(value, (int, long, float, complex))
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@parameter('value', custom_validator=_is_a_number)
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def unary_minus(value):
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return -1 * value
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@parameter('value', custom_validator=_is_a_number)
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def unary_plus(value):
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return value
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@parameter('a', custom_validator=_is_a_number)
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@parameter('b', custom_validator=_is_a_number)
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def plus(a, b):
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return a + b
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@parameter('a', custom_validator=_is_a_number)
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@parameter('b', custom_validator=_is_a_number)
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def minus(a, b):
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return a - b
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@parameter('a', custom_validator=_is_a_number)
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@parameter('b', custom_validator=_is_a_number)
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def multiply(a, b):
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return a * b
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@parameter('a', custom_validator=_is_a_number)
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@parameter('b', custom_validator=_is_a_number)
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def divide(a, b):
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return a / b
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# comparison
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def less_then(a, b):
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return a < b
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def greater_or_equals(a, b):
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return a >= b
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def less_or_equals(a, b):
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return a <= b
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def greater_then(a, b):
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return a > b
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def equals(a, b):
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return a == b
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def not_equals(a, b):
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return a != b
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def add_to_context(context):
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# prefix unary
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context.register_function(unary_minus, 'unary_-')
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context.register_function(unary_plus, 'unary_+')
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# arithmetic actions
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context.register_function(plus, 'operator_+')
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context.register_function(minus, 'operator_-')
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context.register_function(multiply, 'operator_*')
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context.register_function(divide, 'operator_/')
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# comparison
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context.register_function(greater_then, 'operator_>')
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context.register_function(less_then, 'operator_<')
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context.register_function(greater_or_equals, 'operator_>=')
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context.register_function(less_or_equals, 'operator_<=')
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context.register_function(equals, 'operator_=')
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context.register_function(not_equals, 'operator_!=')
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