shared_ptr<Shape> circle(new Circle(Vec2f(0, 0), 0.1, Vec3f(1, 0, 0)));

shared_ptr<Shape> rect(new Rect2f(Vec2f(0, 0), 5.0f, 5.0f, 0,
                                  Vec3f(1.0f, 1.0f, 0))              );

I'm trying to understand why the above won't compile. For Whatever reason, when I try to create an instance of Rect2f (which DOES inherit from the Shape class specified the shared_ptr template argument, just like Circle), I get the following errors:

error: expected type-specifier before 'Rect2f'
error: expected ')' before 'Rect2f'

Everything about the Circle shared_ptr is perfectly fine. There are no problems with it; it's only the Rect2f which is causing issues.

Furthermore, the values passed into the constructor are valid.

So, what could the issue be with this one? I have Rect.h included for this. For brevity's sake (and incase I missed something in that file which may be affecting this), I'll post the following:

Rect.h

#pragma once

#include <QGLWidget>
#include <GL/glext.h>
#include <cmath>
#include <QDebug>
#include "Shape.h"
#include "Vec3f.h"
#include "rand.h"

const int DEFAULT_SQUARE_WIDTH = 5;
const int DEFAULT_SQUARE_HEIGHT = 5;

typedef enum {
    RC_TOPLEFT,
    RC_TOPRIGHT,
    RC_BOTTOMRIGHT,
    RC_BOTTOMLEFT
} RectangleCorner;

class Rect2f : public Shape
{
public:

    Rect2f(
        Vec2f center = Vec2f(),
        float width = 4,
        float height = 4,
        float radius = 0,
        Vec3f color = Vec3f()
    );

    ~Rect2f();

    inline const float GetWidth( void ) const {
        return mWidth;
    }

    inline const float GetHeight( void ) const {
        return mHeight;
    }

    inline const Vec2f* GetCorner( RectangleCorner rc ) const {
        switch( rc ) {
c++ shared-ptr pure-virtual
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