public override Exp Analy( )
{
OpKind = OpToken.Kind;
if (OpKind != TokenKind.ADD && OpKind != TokenKind.SUB)
{
ErrorE(OpToken.Position, "运算符'{0}'缺少表达式", OpToken.GetText());
//return null;
}
RightExp = AnalySubExp(RightExp);// RightExp.Analy();
if (RightExp.AnalyCorrect)
{
this.RetType = RightExp.RetType;
Type stype = RetType.SharpType;
if (stype != typeof(int) && stype != typeof(float) && stype != typeof(double) && stype != typeof(decimal))
{
ErrorE(RightExp.Postion, "不能进行'{0}'运算", OpToken.GetText());
//return null;
}
}
if (OpKind == TokenKind.ADD)
{
return(RightExp);
}
else
{
return(this);
}
}
public override Exp Analy(AnalyExpContext context)
{
base.Analy(context);
var symbols = this.AnalyExpContext.Symbols;
OpKind = OpToken.Kind;
if(OpKind!= TokenKind.ADD && OpKind!= TokenKind.SUB)
{
errorf(OpToken.Postion, "运算符'{0}'缺少表达式", OpToken.GetText());
return null;
}
RightExp = RightExp.Analy(context);//RightExp = AnalyExp(RightExp);
if(RightExp==null)
{
TrueAnalyed = false;
return null;
}
Type rtype = RightExp.RetType;
RetType = rtype;
if(rtype!= typeof(int)&& rtype!= typeof(float) && rtype!= typeof(double) && rtype != typeof(decimal))
{
errorf(RightExp.Postion,"不能进行'{0}'运算",OpToken.GetText());
return null;
}
if (OpKind == TokenKind.ADD)
{
return RightExp;
}
return this;
}
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);
}