Hi Boost users!
Is there a way for boost.ublas to warn of type conversions with
ublas::bounded_vector's? I'm using this library for scientific
computations and I came across this problem, I have quite a large
code so I would be useful to know if this mistake occurs elsewhere.
Here is a code example:
int main()
{
double d = M_PI;
unsigned u = d;
cout << "d = " << d << endl;
cout << "u = " << u << endl;
bounded_vector dVec = ublas::scalar_vector<double>(3,M_PI);
bounded_vector uVec = dVec; // ATTENTION: type conversion!
cout << "dVec = " << dVec << endl;
cout << "uVec = " << uVec << endl;
return 0;
}
When I compile this using g++ 4.6.1:
g++ -g3 -Wall -Wextra -ansi -pedantic -Wconversion -std=c++0x test.cpp -o test
I get the following warnings:
test.cpp: In function ‘int main()’:
test.cpp:11:22: warning: conversion to ‘unsigned int’ from ‘double’
may alter its value [-Wconversion]
Program output:
$ ./test
d = 3.14159
u = 3
dVec = [3](3.14159,3.14159,3.14159)
uVec = [3](3,3,3)
The compiler produced a warning for the conversion of the scalars but there was
no warning for the ublas conversion, is there a way of having the compiler write
a warning in that case? -Wconversion or any of the other options don't do this.
Best,
Matija
