float constructors

// 4D Vector --------------------------------------------------------------------------
struct float4
{
public:
    // Variables
    float x, y, z, w;

    // Constructors
    float4();
    float4(float4*);
    float4(float);
    float4(float2, float2);
    float4(float3, float);
    float4(float, float3);
    float4(float, float, float2);
    float4(float, float2, float);
    float4(float2, float, float);
    float4(float, float, float, float);

    // Casting
    // Assignment operators
    // Unary operators
    // Binary operators
};