private IExpression ParseExprAdd()
{
var result = ParseExprMul();
while (true)
{
if (Accept(TokenType.OpAdd) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.Add, result, ParseExprMul());
}
else if (Accept(TokenType.OpAssAdd) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.AssAdd, result, ParseExprMul());
}
else if (Accept(TokenType.OpSub) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.Sub, result, ParseExprMul());
}
else if (Accept(TokenType.OpAssSub) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.AssSub, result, ParseExprMul());
}
else
{
break;
}
}
return(result);
}
private IExpression ParseExprMul()
{
var result = ParseExprPrimary();
/*while (Accept(TokenType.OpMul) != null || Accept(TokenType.OpDiv) != null || Accept(TokenType.OpMod) != null)
* result = new ExprBinaryArithmetic(ExprBinKind.Mul, result, ParseExprPrimary());*/
while (true)
{
if (Accept(TokenType.OpMul) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.Mul, result, ParseExprMul());
}
else if (Accept(TokenType.OpDiv) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.Div, result, ParseExprMul());
}
else if (Accept(TokenType.OpAssMul) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.AssMul, result, ParseExprMul());
}
else if (Accept(TokenType.OpAssDiv) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.AssDiv, result, ParseExprMul());
}
else if (Accept(TokenType.OpMod) != null)
{
result = new ExprBinaryArithmetic(ExprBinKind.Mod, result, ParseExprMul());
}
else
{
break;
}
}
return(result);
}
