Bug #410: Reading a field from one vector and writing it to a second vector fails - NemoMath - Open Source Collaboration Platform

Bug #410

Reading a field from one vector and writing it to a second vector fails

Added by Anonymous about 13 years ago. Updated almost 13 years ago.

Status:

Resolved

Start date:

07/11/2011

Priority:

High

Due date:

Assignee:

M. Rolf

% Done:

100%

Category:

Estimated time:

1.00 hour

Target version:

NemoMath 0.1

Description

Example code:

#include &lt;iostream&gt;
#include "Vector.h" 
int main() {
 nemo::RealVector values = nemo::RealVector(4); // 4-dim. vector
 unsigned int dim = values.dimension() / 2; // 2
 nemo::RealVector tmpA(dim), tmpB(dim); // 2-dim. vectors
 for (unsigned int index = 0; index < dim; ++index) {
  tmpA[index] = values[2 * index];
  tmpB[index] = values[2 * index + 1];
 }
 std::cout << tmpA << std::endl;
 std::cout << tmpB << std::endl;
}

Error is:

nemo/Vector.h: In member function ‘nemo::MathVector&lt;double&gt;::ReadWriteRef& nemo::MathVector&lt;double&gt;::ReadWriteRef::operator=(const nemo::MathVector&lt;double&gt;::ReadWriteRef&)’:
nemo/Vector.h:151: error: non-static reference member ‘nemo::IntrusiveCowSupport&lt;nemo::MathVector&lt;double&gt;::VectorData&lt;double&gt; >& nemo::MathVector&lt;double&gt;::ReadWriteRef::data’, can't use default assignment operator
examples/Crash.cpp: In function ‘int main()’:
examples/Crash.cpp:12: note: synthesized method ‘nemo::MathVector&lt;double&gt;::ReadWriteRef& nemo::MathVector&lt;double&gt;::ReadWriteRef::operator=(const nemo::MathVector&lt;double&gt;::ReadWriteRef&)’ first required here

History

#1 Updated by M. Rolf about 13 years ago

Status changed from New to In Progress

#2 Updated by M. Rolf about 13 years ago

Status changed from In Progress to Resolved
% Done changed from 0 to 100

New test code:

// non-const operator[]
    RealVector v1(2, 1.0);
    RealVector v1B(v1);
    RealVector v2(2, 2.0);
    RealVector v2B(v2);

v1[0] = v2[0];

// const operator[]
    const RealVector c1(2, 3.0);
    const RealVector c1B(c1);

v1[0] = c1[0];

// use non-const[] inside something else
    RealVector z(2, 0.0);
    double a = std::sin(z[0]);

double b = 2*v1[1] + v2[1];

#3 Updated by M. Rolf almost 13 years ago

Target version set to NemoMath 0.1

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