internal Expression parseExpression(int precedence)
{
Token token = consume();
PrefixParselet prefix = null;
var type = token.getType();
if (!prefixParselets.TryGetValue(type, out prefix))
{
throw new Exception("Could not parse \"" + token.Text + "\".");
}
Expression left = prefix.parse(this, token);
while (precedence < getPrecedence())
{
token = consume();
InfixParselet infix = infixParselets[token.getType()];
left = infix.parse(this, left, token);
}
return(left);
}
protected void RegisterParselet(TokenType tokenType, InfixParselet parselet)
{
_infixParselets.Add(tokenType, parselet);
}