Move GetText(), SetText(), and String() from CommonToken to BaseToken #4397
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This change means that BaseToken satisfies the Token interface. Signed-off-by: Jerry Berg <107155935+googleberg@users.noreply.github.com>
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This change means that BaseToken satisfies the Token interface.
The recent addition of the String() function to the Token interface means that any custom BaseToken derivatives no longer satisfy the Token interface. Rather than forcing them all to implement their own String() function, put the CommonToken String function (plus GetText and SetText) into the BaseToken.