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# # Copyright (c) 2012-2017 The ANTLR Project. All rights reserved. # Use of this file is governed by the BSD 3-clause license that # can be found in the LICENSE.txt file in the project root. # # # A {@link Token} object representing an entire subtree matched by a parser # rule; e.g., {@code <expr>}. These tokens are created for {@link TagChunk} # chunks where the tag corresponds to a parser rule. # from antlr4.Token import Token class RuleTagToken(Token): __slots__ = ('label', 'ruleName') # # Constructs a new instance of {@link RuleTagToken} with the specified rule # name, bypass token type, and label. # # @param ruleName The name of the parser rule this rule tag matches. # @param bypassTokenType The bypass token type assigned to the parser rule. # @param label The label associated with the rule tag, or {@code null} if # the rule tag is unlabeled. # # @exception IllegalArgumentException if {@code ruleName} is {@code null} # or empty. def __init__(self, ruleName:str, bypassTokenType:int, label:str=None): if ruleName is None or len(ruleName)==0: raise Exception("ruleName cannot be null or empty.") self.source = None self.type = bypassTokenType # token type of the token self.channel = Token.DEFAULT_CHANNEL # The parser ignores everything not on DEFAULT_CHANNEL self.start = -1 # optional; return -1 if not implemented. self.stop = -1 # optional; return -1 if not implemented. self.tokenIndex = -1 # from 0..n-1 of the token object in the input stream self.line = 0 # line=1..n of the 1st character self.column = -1 # beginning of the line at which it occurs, 0..n-1 self.label = label self._text = self.getText() # text of the token. self.ruleName = ruleName def getText(self): if self.label is None: return "<" + self.ruleName + ">" else: return "<" + self.label + ":" + self.ruleName + ">"
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