CppAD::vector Template Class: Example and Test
Keywords: cppad::vector template class: example test vector Cppad

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CppAD::vector Template Class: Example and Test
`

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

    bool CppAD_vector(void)
    {	bool ok = true;
    	using CppAD::vector;     // so can use vector instead of CppAD::vector
    	typedef double Type;     // change double to test other types

    	// check Simple Vector specifications
    	CppAD::CheckSimpleVector< Type, vector<Type> >();

    	vector<Type> x;          // default constructor
    	ok &= (x.size() == 0);

    	x.resize(2);             // resize and set element assignment
    	ok &= (x.size() == 2);
    	x[0] = Type(1);
    	x[1] = Type(2);

    	vector<Type> y(2);       // sizing constructor
    	ok &= (y.size() == 2);

    	const vector<Type> z(x); // copy constructor and const element access
    	ok &= (z.size() == 2);
    	ok &= ( (z[0] == Type(1)) && (z[1] == Type(2)) );

    	x[0] = Type(2);          // modify, assignment changes x
    	ok &= (x[0] == Type(2));

    	x = y = z;               // vector assignment
    	ok &= ( (x[0] == Type(1)) && (x[1] == Type(2)) );
    	ok &= ( (y[0] == Type(1)) && (y[1] == Type(2)) );
    	ok &= ( (z[0] == Type(1)) && (z[1] == Type(2)) );

    	// test of output
    	std::string        correct= "{ 1, 2 }";
    	std::string        str;
    	std::ostringstream buf;
    	buf << z;
    	str = buf.str();
    	ok &= (str == correct);

    	// test resize(1), resize(0), capacity, and clear
    	size_t i = x.capacity();
    	ok      &= i >= 2;
    	x.resize(1);
    	ok      &= x[0] == Type(1);
    	ok      &= i == x.capacity();
    	x.resize(0);
    	ok      &= i == x.capacity();
    	x.clear();
    	ok      &= 0 == x.capacity();

    	// test of push_back scalar and capacity
    	size_t N = 100;
    	for(i = 0; i < N; i++)
    	{	size_t old_capacity = x.capacity();
    		x.push_back( Type(i) );
    		ok &= (i+1) == x.size();
    		ok &= i < x.capacity();
    		ok &= (i == old_capacity) || old_capacity == x.capacity();
    	}
    	for(i = 0; i < N; i++)
    		ok &= ( x[i] == Type(i) );

    	// test of data
    	Type* data = x.data();
    	for(i = 0; i < N; i++)
    	{	ok &= data[i] == Type(i);
    		data[i] = Type(N - i);
    		ok &= x[i] == Type(N - i);
    	}

    	// test of push_vector
    	x.push_vector(x);
    	ok &= (x.size() == 2 * N);
    	for(i = 0; i < N; i++)
    	{	ok &= x[i] == Type(N - i);
    		ok &= x[i+N] == Type(N - i);
    	}

    	return ok;
    }

`

Input File: example/cppad_vector.cpp