# Copyright 2017 Google Inc.
# 
# 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.

import 'util/byte.grm' as b;
import 'en/verbalizer/numbers.grm' as n;

digit = b.kDigit @ n.CARDINAL_NUMBERS | ("0" : "@@OTHER_ZERO_VERBALIZATIONS@@");

export DIGITS  = digit (n.I[" "] digit)*;

# Various common factorizations

two_digits = b.kDigit{2} @ n.CARDINAL_NUMBERS;

three_digits = b.kDigit{3} @ n.CARDINAL_NUMBERS;

mixed =
   (digit n.I[" "] two_digits)
 | (two_digits n.I[" "] two_digits)
 | (two_digits n.I[" "] three_digits)
 | (two_digits n.I[" "] two_digits n.I[" "] two_digits)
;

export MIXED_NUMBERS = Optimize[mixed];
