Vector Iterator problem in VS2005
Author
Hi
I got some strange problem. I have code in visual c++ 6. and i upgrade it to VS 2005 compiler . Since this days STL changed lot of things i am getting some assert error. Here my code look like this.
// look for v1
vector<int>::iterator result = find(face.begin(),face.end(),v1);
vector<int>::iterator prev = result - 1; // <=== this point i am getting assert error.
Can anyone tell me why it gives me error ?
[Edited by - nareshn2008 on May 29, 2009 5:04:39 AM]
I don't see how that would compile, a vector<int>::iterator cannot be converted to a vector<BSP_VertexInd>::iterator (unless BSP_VertexInd is a typedef for int, but that would be confusing)
Author
Quote:Original post by Codeka
I don't see how that would compile, a vector<int>::iterator cannot be converted to a vector<BSP_VertexInd>::iterator (unless BSP_VertexInd is a typedef for int, but that would be confusing)
Sorry i was miss it. I just want to show simple example :)
Quote:Original post by Codeka
I don't see how that would compile, a vector<int>::iterator cannot be converted to a vector<BSP_VertexInd>::iterator (unless BSP_VertexInd is a typedef for int, but that would be confusing)
#include <vector>struct BSP_VertexInd {};namespace std { template <> struct vector<BSP_VertexInd> { struct iterator { template <typename T> iterator (T const &) {} }; };}using std::vector;vector<int>::iterator result;vector<BSP_VertexInd>::iterator prev = result - 1; // <=== this point i am getting assert error.int main () {}Compiles fine, no typedef harmed ;)
Quote:Original post by nareshn2008Quote:Original post by Codeka
I don't see how that would compile, a vector<int>::iterator cannot be converted to a vector<BSP_VertexInd>::iterator (unless BSP_VertexInd is a typedef for int, but that would be confusing)
Sorry i was miss it. I just want to show simple example :)
We will be able to help you if you post a real, preferably minimal, testcase :)
Author
Quote:Original post by phresnelQuote:Original post by nareshn2008Quote:Original post by Codeka
I don't see how that would compile, a vector<int>::iterator cannot be converted to a vector<BSP_VertexInd>::iterator (unless BSP_VertexInd is a typedef for int, but that would be confusing)
Sorry i was miss it. I just want to show simple example :)
We will be able to help you if you post a real, preferably minimal, testcase :)
Hi phresnel
Thanks for reply :)
This is real code.
vector<BSP_VertexInd>::iterator result =
find(face.m_verts.begin(),face.m_verts.end(),v1);
vector<BSP_VertexInd>::iterator prev = result - 1; // << here is error
BSP_VertexInd is some sort of structure .
Quote:Original post by nareshn2008Quote:Original post by phresnelQuote:Original post by nareshn2008Quote:Original post by Codeka
I don't see how that would compile, a vector<int>::iterator cannot be converted to a vector<BSP_VertexInd>::iterator (unless BSP_VertexInd is a typedef for int, but that would be confusing)
Sorry i was miss it. I just want to show simple example :)
We will be able to help you if you post a real, preferably minimal, testcase :)
Hi phresnel
Thanks for reply :)
This is real code.
vector<BSP_VertexInd>::iterator result =
find(face.m_verts.begin(),face.m_verts.end(),v1);
vector<BSP_VertexInd>::iterator prev = result - 1; // << here is error
BSP_VertexInd is some sort of structure .
Did you check what std::find returns?
Quote:Original post by nareshn2008
Hi
It is returns face.begin(). So what will be trick to reverse_iterator ?
But what do you expect? You can't get an element before the first one. That's an error.
This topic is closed to new replies.
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