[Insight-users] Primary question: SmartPointer
Jiang
jiang@TI.Uni-Trier.DE
Wed May 5 11:12:36 EDT 2004
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Hi, ITK-users,
I have one question about how to transfer SmartPointer as return value.
The following is my part of code:
typedef .....ImageType
void ClassA::func()
{
ImageType::Pointer ResultImage = ImageType::New();
ResultImage=OneFilter();
}
ImageType* ClassA::OneFilter()
{
.......
Some filter process
.......
return filter->GetOutput();
}
The program stops at ResultImage=OneFilter();
I have debugged ClassA::OneFilter, it can work. If I don't use
ClassA::OneFilter() and ResultImage=OneFilter(),
and put
.......
Some filter process
.......
directly in ClassA::func(), then everything is ok. The filter->GetOutput
is correct.
I guess the problem is
ImageType::Pointer ResultImage = ImageType::New();
ResultImage= OneFilter();
Is it wrong way to return SmartPoiner from one function to another
function?
How should I do?
Thanks a lot!
Chunyan Jiang
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<body lang=3DZH-CN link=3Dblue vlink=3Dpurple =
style=3D'tab-interval:21.0pt;text-justify-trim:
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<div class=3DSection1 style=3D'layout-grid:15.6pt'>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>Hi,
ITK-users,<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>I
have one question about how to transfer <span =
class=3DSpellE>SmartPointer</span>
as return value.<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>The
following is my part of code:<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><span class=3DSpellE><span class=3DGramE><font =
size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>typedef</span></font></span></=
span><font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'> =
……………<span
class=3DSpellE>ImageType</span><o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><span class=3DGramE><font size=3D1 =
face=3DArial><span lang=3DEN-GB
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-=
ansi-language:
EN-GB'>void</span></font></span><font size=3D1 face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-=
ansi-language:
EN-GB'> <span =
class=3DSpellE>ClassA::func</span>()<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>{<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DSpellE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>ImageType::Pointer</span></fon=
t></span><font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'> <span =
class=3DSpellE>ResultImage</span>
=3D <span class=3DSpellE>ImageType::<span =
class=3DGramE>New</span></span><span
class=3DGramE>(</span>);<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DSpellE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>ResultImage</span></font></spa=
n><font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>=3D<span =
class=3DSpellE><span
class=3DGramE>OneFilter</span></span><span =
class=3DGramE>(</span>);<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>}<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><span class=3DSpellE><font size=3D1 =
face=3DArial><span lang=3DEN-GB
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-=
ansi-language:
EN-GB'>ImageType</span></font></span><font size=3D1 face=3DArial><span =
lang=3DEN-GB
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-=
ansi-language:
EN-GB'>* <span class=3DSpellE>ClassA::<span =
class=3DGramE>OneFilter</span></span><span
class=3DGramE>()</span><o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>{<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>……………….<o:p></o:p></span></font></p=
>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>Some
filter process<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>……………….<o:p></o:p></span></font></p=
>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><span
style=3D'mso-tab-count:1'>  =
; </span><span
class=3DGramE>return</span> filter-><span =
class=3DSpellE>GetOutput</span>();<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>}<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'>The program stops at <span =
class=3DSpellE>ResultImage</span>=3D<span
class=3DSpellE><span class=3DGramE>OneFilter</span></span><span =
class=3DGramE>(</span>);<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'><span
style=3D'mso-tab-count:1'>  =
; </span>I
have debugged <span class=3DSpellE>ClassA::OneFilter</span>, it can =
work. If I
don’t use <span class=3DSpellE>ClassA::<span =
class=3DGramE>OneFilter</span></span><span
class=3DGramE>(</span>) and <span =
class=3DSpellE>ResultImage</span>=3D<span
class=3DSpellE>OneFilter</span>(), <o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DGramE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>and</span></font></span><font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'> put =
<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>……………….<o:p></o:p></span></font></p=
>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>Some
filter process<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:
9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-ansi-language:EN-GB=
'>……………….<o:p></o:p></span></font></p=
>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DGramE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>directly</span></font></span><=
font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'> in <span =
class=3DSpellE>ClassA::func</span>(),
then everything is ok. The filter-><span =
class=3DSpellE>GetOutput</span> is
correct.<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'>I guess the problem is =
<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DSpellE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>ImageType::Pointer</span></fon=
t></span><font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'> <span =
class=3DSpellE>ResultImage</span>
=3D <span class=3DSpellE>ImageType::<span =
class=3DGramE>New</span></span><span
class=3DGramE>(</span>);<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DSpellE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>ResultImage</span></font></spa=
n><font
size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'>=3D <span =
class=3DSpellE><span
class=3DGramE>OneFilter</span></span><span =
class=3DGramE>(</span>);<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'>Is it wrong way to return <span =
class=3DSpellE>SmartPoiner</span>
from one function to another function?<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'>How should I do?<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'>Thanks a lot!<o:p></o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><font size=3D1 =
face=3DArial><span
lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;
mso-ansi-language:EN-GB'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span =
class=3DSpellE><font size=3D1
face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:10.0pt;
font-family:Arial;mso-ansi-language:EN-GB'>Chunyan</span></font></span><f=
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size=3D1 face=3DArial><span lang=3DEN-GB =
style=3D'font-size:9.0pt;mso-bidi-font-size:
10.0pt;font-family:Arial;mso-ansi-language:EN-GB'> =
Jiang<o:p></o:p></span></font></p>
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