token and rule labels to be used in rewrite

input string example

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antlr grammar rewrite rules

grammar TreeConstruct;
options 
{
  output=AST;
}

prog 
: first=DIGIT other+=DIGIT*  -> ^($first $other*)
;

DIGIT: '0' .. '9' ;


WS: (' '|'\r'|'\n') {$channel=HIDDEN;};

output tree

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