import unittest
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import textwrap
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import antlr3
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import antlr3.tree
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import stringtemplate3
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import testbase
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import sys
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import os
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from StringIO import StringIO
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# FIXME: port other tests from TestLexer.java
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class T(testbase.ANTLRTest):
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def execParser(self, grammar, grammarEntry, input):
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lexerCls, parserCls = self.compileInlineGrammar(grammar)
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cStream = antlr3.StringStream(input)
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lexer = lexerCls(cStream)
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tStream = antlr3.CommonTokenStream(lexer)
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parser = parserCls(tStream)
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result = getattr(parser, grammarEntry)()
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return result
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def testRefToRuleDoesNotSetChannel(self):
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# this must set channel of A to HIDDEN. $channel is local to rule
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# like $type.
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grammar = textwrap.dedent(
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r'''
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grammar P;
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options {
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language=Python;
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}
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a returns [foo]: A EOF { $foo = '\%s, channel=\%d' \% ($A.text, $A.channel); } ;
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A : '-' WS I ;
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I : '0'..'9'+ ;
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WS : (' '|'\n') {$channel=HIDDEN;} ;
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''')
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found = self.execParser(
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grammar, 'a',
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"- 34"
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)
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self.failUnlessEqual("- 34, channel=0", found)
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if __name__ == '__main__':
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unittest.main()
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