geometry::Shape Class Reference

Abstract base class for all 2D shapes. More...

#include <shapes.hpp>

Inheritance diagram for geometry::Shape:

Public Member Functions
virtual	~Shape ()=default
	Virtual destructor for safe polymorphic deletion.
virtual double	area () const =0
	Compute the area of the shape.
std::string	describe () const
	Pretty-print shape information.
virtual std::string	name () const =0
	Return the human-readable name of the shape.
virtual double	perimeter () const =0
	Compute the perimeter of the shape.

Static Public Member Functions
static int	instance_count ()
	Get the total count of Shape instances created.

Protected Member Functions
	Shape ()
	Increment the instance counter.

Detailed Description

Abstract base class for all 2D shapes.

Every shape must provide its area, perimeter, and a human-readable name. The Shape class also tracks the total number of shape instances created (demonstrating static member documentation).

Note

Shapes are non-copyable by design. Use std::unique_ptr<Shape> for polymorphic ownership.

See also

Circle, Rectangle, Triangle, Square

Definition at line 47 of file shapes.hpp.

Constructor & Destructor Documentation

~Shape()

virtual geometry::Shape::~Shape ( )

virtualdefault

Virtual destructor for safe polymorphic deletion.

Shape()

geometry::Shape::Shape ( )

inlineprotected

Increment the instance counter.

Definition at line 87 of file shapes.hpp.

{ ++instance_count_; }

Member Function Documentation

area()

virtual double geometry::Shape::area ( ) const

nodiscardpure virtual

Compute the area of the shape.

Returns

The area in square units.

Implemented in geometry::Circle, geometry::Rectangle, and geometry::Triangle.

Referenced by describe().

describe()

std::string geometry::Shape::describe ( ) const

inlinenodiscard

Pretty-print shape information.

Returns

A formatted string: "ShapeName(area=..., perimeter=...)".

Definition at line 74 of file shapes.hpp.

                                             {
        return name() + "(area=" + std::to_string(area())
               + ", perimeter=" + std::to_string(perimeter()) + ")";
    }

References area(), name(), and perimeter().

instance_count()

static int geometry::Shape::instance_count ( )

inlinestatic

Get the total count of Shape instances created.

Returns

The running total.

Definition at line 83 of file shapes.hpp.

{ return instance_count_; }

name()

virtual std::string geometry::Shape::name ( ) const

nodiscardpure virtual

Return the human-readable name of the shape.

Returns

A string like "Circle", "Rectangle", etc.

Implemented in geometry::Circle, geometry::Rectangle, geometry::Square, and geometry::Triangle.

Referenced by describe().

perimeter()

virtual double geometry::Shape::perimeter ( ) const

nodiscardpure virtual

Compute the perimeter of the shape.

Returns

The perimeter in linear units.

Implemented in geometry::Circle, geometry::Rectangle, and geometry::Triangle.

Referenced by describe().

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The documentation for this class was generated from the following file:

• demo/src/shapes.hpp