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vector_bool.cpp

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CppAD::vectorBool Class: Example and Test

# include <cppad/utility/vector_bool.hpp>
# include <cppad/utility/check_simple_vector.hpp>
# include <sstream> // sstream and string are used to test output operation
# include <string>

bool vectorBool(void)
{   bool ok = true;
    using CppAD::vectorBool;

    // is that boolvector is
    // a simple vector class with elements of type bool
    CppAD::CheckSimpleVector< bool, vectorBool >();

    vectorBool x;          // default constructor
    ok &= (x.size() == 0);

    // resize using size_t or int
    size_t two_s = 2;
    int    two_i = 2;
    x.resize( two_s );
    x.resize( two_i );
    ok &= (x.size() == 2);

    // set element values using size_t and int
    size_t zero_s = 0;
    int    one_i  = 1;
    x[zero_s]     = false;
    x[one_i]      = true;

    vectorBool y(2);       // sizing constructor
    ok &= (y.size() == 2);

    // swap, get element values using size_t and int
    y.swap(x);
    ok &= y[zero_s] == false;
    ok &= y[one_i]  == true;

    const vectorBool z(y); // copy constructor and const element access
    ok &= (z.size() == 2);
    ok &= ( (z[0] == false) && (z[1] == true) );

    x[0] = true;           // modify, assignment changes x
    ok &= (x[0] == true);

    // resize x to zero and check that vector assignment works for both
    // size zero and matching sizes
    x.resize(0);
    ok &= (x.size() == 0);
    ok &= (y.size() == z.size());
    //
    x = y = z;
    ok &= ( (x[0] == false) && (x[1] == true) );
    ok &= ( (y[0] == false) && (y[1] == true) );
    ok &= ( (z[0] == false) && (z[1] == true) );

    // test of push_vector
    y.push_vector(z);
    ok &= y.size() == 4;
    ok &= ( (y[0] == false) && (y[1] == true) );
    ok &= ( (y[2] == false) && (y[3] == true) );

    y[1] = false;           // element assignment to another element
    x[0] = y[1];
    ok &= (x[0] == false);

    // test of output
    std::string        correct= "01";
    std::string        str;
    std::ostringstream buf;
    buf << z;
    str = buf.str();
    ok &= (str == correct);

    // test resize(0), capacity, and clear
    size_t i = x.capacity();
    ok      &= i > 0;
    x.resize(0);
    ok      &= i == x.capacity();
    x.clear();
    ok      &= 0 == x.capacity();

    // test of push_back element
    for(i = 0; i < 100; i++)
        x.push_back( (i % 3) != 0 );
    ok &= (x.size() == 100);
    for(i = 0; i < 100; i++)
        ok &= ( x[i] == ((i % 3) != 0) );

    // initializer list constructor
    vectorBool w = { true, false, false, true };
    ok &= w.size() == 4;
    ok &= w[0] == true;
    ok &= w[1] == false;
    ok &= w[2] == false;
    ok &= w[3] == true;

    return ok;
}