private void RegisterToken(Int32 leftBindingPower, Func <Int32, Expression> nullDenotation, params TokenType[] tokens)
{
var denotation = new NullDenotation(leftBindingPower, nullDenotation);
foreach (TokenType tokenType in tokens)
{
_nullDenotations.Add(tokenType, denotation);
}
}
private Expression ParseExpression(Int32 leftBindingPower)
{
NullDenotation nullDenotation = _nullDenotations[_lookahead.Type];
Expression expression = nullDenotation.Invoke();
LeftDenotation leftDenotation = _leftDenotations[_lookahead.Type];
while (leftDenotation != null && leftDenotation.LeftBindingPower > leftBindingPower)
{
expression = leftDenotation.Invoke(expression);
leftDenotation = _leftDenotations[_lookahead.Type];
}
return(expression);
}
