parser/yang-parser-antlr/src/main/antlr4/org/opendaylight/yangtools/yang/parser/antlr/IfFeatureExpressionParser.g4

   1 //
   2 // Copyright (c) 2017 Cisco Systems, Inc. and others.  All rights reserved.
   3 //
   4 // This program and the accompanying materials are made available under the
   5 // terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6 // and is available at http://www.eclipse.org/legal/epl-v10.html
   7 //
   8 parser grammar IfFeatureExpressionParser;
   9
  10 options {
  11     tokenVocab = IfFeatureExpressionLexer;
  12 }
  13
  14 if_feature_expr: if_feature_term (SEP OR SEP if_feature_term)*;
  15 if_feature_term: if_feature_factor (SEP AND SEP if_feature_term)*;
  16 if_feature_factor: NOT SEP if_feature_factor
  17                  | LP SEP? if_feature_expr SEP? RP
  18                  | identifier_ref_arg;
  19
  20 identifier_ref_arg : (IDENTIFIER COLON)? IDENTIFIER;