runtime/Cpp/tests/t044trace.g

grammar t044trace;
options {
  language =Cpp;
}

@lexer::includes
{
#include "UserTestTraits.hpp"
}
@lexer::namespace
{ Antlr3Test }

@parser::includes {
#include "UserTestTraits.hpp"
}
@parser::namespace
{ Antlr3Test }

@init {
    self._stack = None
}

a: '<' ((INT '+')=>b|c) '>';
b: c ('+' c)*;
c: INT 
    {
        if self._stack is None:
            self._stack = self.getRuleInvocationStack()
    }
    ;

INT: ('0'..'9')+;
WS: (' ' | '\n' | '\t')+ {$channel = HIDDEN;};