Expression Term()
{
var lhs = Group();
while (true)
{
var token = Peek();
if (token != null)
{
if (token.Type == TokenType.Operator && (string)token.Value == "*")
{
Next();
var rhs = Group();
var ret = new BinOpExpression();
ret.Line = token.Line;
ret.Lhs = lhs;
ret.Rhs = rhs;
ret.Operator = (string)token.Value;
lhs = ret;
}
else if (token.Type == TokenType.Operator && (string)token.Value == "/")
{
Next();
var rhs = Group();
var ret = new BinOpExpression();
ret.Line = token.Line;
ret.Lhs = lhs;
ret.Rhs = rhs;
ret.Operator = (string)token.Value;
lhs = ret;
}
else if (token.Type == TokenType.Operator)
{
break;
}
else if (token.Type == TokenType.RightParentheses)
{
break;
}
else if (token.Type == TokenType.Equal || token.Type == TokenType.NewLine)
{
break;
}
else
{
throw new CompileException(string.Format("Invalid token {0}", token.Type), token.Line);
}
}
else
{
return(lhs);
}
}
return(lhs);
}
Expression Term()
{
var lhs = Group();
while (true)
{
var token = Peek();
if (token != null)
{
if (token.Type == TokenType.Operator && ((string)token.Value == "*" || (string)token.Value == "/" || (string)token.Value == "%"))
{
Next();
var rhs = Group();
var ret = new BinOpExpression();
ret.Line = token.Line;
ret.Lhs = lhs;
ret.Rhs = rhs;
ret.Operator = (string)token.Value;
lhs = ret;
}
else if (token.Type == TokenType.Operator)
{
break;
}
else if (token.Type == TokenType.RightParentheses)
{
break;
}
else if (token.Type == TokenType.Equal || token.Type == TokenType.NewLine)
{
break;
}
else if (token.Type == TokenType.Comma)
{
break;
}
else
{
throw new InvalidTokenException(token.ToString(), token.Line);
}
}
else
{
return(lhs);
}
}
return(lhs);
}
