AST Term()
{
AST node = Factor();
while (new[] { TokenKind.Mul, TokenKind.IntDiv, TokenKind.FloatDiv }.Contains(CurrentToken.Type))
{
Token operation = CurrentToken;
if (operation.Type == TokenKind.Mul)
{
Eat(TokenKind.Mul);
}
if (operation.Type == TokenKind.IntDiv)
{
Eat(TokenKind.IntDiv);
}
if (operation.Type == TokenKind.FloatDiv)
{
Eat(TokenKind.FloatDiv);
}
node = new BinaryOperation(node, operation, Factor());
}
return(node);
}
AST Expr()
{
AST node = Term();
while (new[] { TokenKind.Plus, TokenKind.Minus }.Contains(CurrentToken.Type))
{
Token operation = CurrentToken;
if (operation.Type == TokenKind.Plus)
{
Eat(TokenKind.Plus);
}
else if (operation.Type == TokenKind.Minus)
{
Eat(TokenKind.Minus);
}
node = new BinaryOperation(node, operation, Term());
}
return(node);
}