private static void parsePrecedence(Precedence precedence)
{
advance();
ParseFn prefixRule = getRule(parser.previous.type).prefix;
if (prefixRule == null)
{
error("Expect expression.");
return;
}
bool canAssign = precedence <= Precedence.PREC_ASSIGNMENT;
prefixRule(canAssign);
while (precedence <= getRule(parser.current.type).precedence)
{
advance();
ParseFn infixRule = getRule(parser.previous.type).infix;
infixRule(canAssign);
}
if (canAssign && match(TokenType.TOKEN_EQUAL))
{
error("Invalid assignment target.");
}
}
public Parser(string type, ParseFn fn)
{
Type = type;
Fn = fn;
}
public ParseRule(ParseFn prefix, ParseFn infix, Precedence precedence)
{
this.prefix = prefix; this.infix = infix; this.precedence = precedence;
}
public Rule(ParseFn prefix, ParseFn infix, Precedence precedence)
{
Prefix = prefix;
Infix = infix;
Precedence = precedence;
}
