public override string ToCode()
{
StringBuilder buf = new StringBuilder();
buf.Append(OpToken != null ? OpToken.ToCode() : "");
buf.Append(RightExp != null ? RightExp.ToString() : "");
return buf.ToString();
}
public override Exp Analy(AnalyExpContext context)
{
base.Analy(context);
var symbols = this.AnalyExpContext.Symbols;
OpKind = OpToken.Kind;
if (RightExp == null)
{
errorf(OpToken.Postion, "运算符'{0}'右边缺少运算元素", OpToken.GetText());
return(null);
}
else if (LeftExp == null && RightExp != null)
{
UnaryExp unexp = new UnaryExp(OpToken, RightExp);
var exp = unexp.Analy(context);
return(exp);
}
LeftExp = LeftExp.Analy(context); //LeftExp = AnalyExp(LeftExp);
RightExp = RightExp.Analy(context); //RightExp = AnalyExp(RightExp);
if (LeftExp == null || RightExp == null)
{
TrueAnalyed = false;
return(null);
}
Type ltype = LeftExp.RetType;
Type rtype = RightExp.RetType;
OpMethod = BinExpUtil.GetCalcMethod(OpKind, ltype, rtype);
if (OpMethod != null)
{
RetType = OpMethod.ReturnType;
}
if (RetType == null)
{
error("两种类型无法进行'" + OpToken.ToCode() + "'运算");
}
return(this);
}