/*
I'm getting errors I don't understand with this code:
(never mind the linker errors, I guess they're the result of the above warnings, but I don't know why the warnings are occurring)

The compiler commandline is:
c++ test_point.cpp point.cpp -o test_point

Errors:
point.h:23: warning: inline function ‘float gfx::point::x() const’ used but never defined
point.h:26: warning: inline function ‘float gfx::point::y() const’ used but never defined
point.h:17: warning: inline function ‘gfx::point& gfx::point::x(float)’ used but never defined
point.h:20: warning: inline function ‘gfx::point& gfx::point::y(float)’ used but never defined
point.h:30: warning: inline function ‘bool gfx::point::operator!=(const gfx::point&) const’ used but never defined
point.h:29: warning: inline function ‘bool gfx::point::operator==(const gfx::point&) const’ used but never defined
/tmp/ccI5jwDk.o: In function `main':
test_point.cpp:(.text+0xa8): undefined reference to `gfx::point::x() const'
test_point.cpp:(.text+0x13c): undefined reference to `gfx::point::y() const'
test_point.cpp:(.text+0x1d5): undefined reference to `gfx::point::x(float)'
test_point.cpp:(.text+0x1dd): undefined reference to `gfx::point::x() const'
test_point.cpp:(.text+0x27a): undefined reference to `gfx::point::y(float)'
test_point.cpp:(.text+0x282): undefined reference to `gfx::point::y() const'
test_point.cpp:(.text+0x33a): undefined reference to `gfx::point::operator!=(gfx::point const&) const'
test_point.cpp:(.text+0x3c4): undefined reference to `gfx::point::x(float)'
test_point.cpp:(.text+0x3d7): undefined reference to `gfx::point::y(float)'
test_point.cpp:(.text+0x3e9): undefined reference to `gfx::point::operator==(gfx::point const&) const'
*/

// point.h
#include "point.h"
namespace gfx {
    point& point::x(float ax) {
        cx = ax;
        return *this;
    }
    point& point::y(float ay) {
        cy = ay;
        return *this;
    }
    float point::x() const {
        return cx;
    }
    float point::y() const {
        return cy;
    }
    bool point::operator==(const point& other) const {
        return ((other.x() == x()) && (other.y() == y()));
    }
    bool point::operator!=(const point& other) const {
        return ((other.x() != x()) || (other.y() != y()));
    }

}

// point.cpp
#ifndef POINT_H
#define POINT_H
namespace gfx {
    class point {
        protected:
            /* coordinate x */
            float cx;
            /* coordinate y */
            float cy;
        public:
            /** Constructor for the point.
             * @param ax the point x.
             * @param ay the point y.
             */
            point(float ax, float ay) :cx(ax), cy(ay) {}
            /* setter for x */
            inline point& x(float ax);

            /* setter for y */
            inline point& y(float ay);

            /* getter for x */
            inline float x() const;

            /* getter for y */
            inline float y() const;

            /* operators */
            inline bool operator==(const point& other) const;
            inline bool operator!=(const point& other) const;

            /* virtual destructor */
            virtual ~point(){}
    };
}
#endif

// test_point.cpp
#include "point.h"
#include "../test_macros.h"

int main(int argc, char** argv) {
    gfx::point a(2,1);
    TEST(a.x() == 2, "Testing x getter")
    TEST(a.y() == 1, "Testing y getter")
    TEST(a.x(3).x() == 3, "Testing x setter")
    TEST(a.y(4).y() == 4, "Testing y setter")
    gfx::point b(2,1);
    TEST(a != b, "Testing operator!=")
    a.x(2).y(1);
    TEST(a == b, "Testing operator==")
    return 0;
}