std_tools 0.1.4

Collection of general purpose tools for solving problems. Fundamentally extend the language without spoiling, so may be used solely or in conjunction with another module of such kind.
Documentation 
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/// Internal namespace.
pub( crate ) mod private
{
  use crate::*;

  /// Command to draw rectangle.
  #[ allow( dead_code ) ]
  #[ derive( Debug, Clone ) ]
  pub struct RectChanger
  {
    /// Id.
    pub( crate ) id : Id,
    /// Draw changer.
    pub( crate ) draw : DrawChanger,
  }

  impl RectChanger
  {

    /// Constructor.
    #[ inline ]
    pub fn _new( draw : DrawChanger ) -> Self
    {
      let id = Id::new::< Self >();
      let change = RectChange::new( id );
      let mut result = Self{ id, draw };
      change.add_to( &mut result );
      result
    }

    /// ChangeInterface region.
    #[ inline ]
    pub fn region( mut self, left_top : X2< f32 >, right_bottom : X2< f32 > ) -> Self
    {
      let change = RectChange::new( self.id() ).region( left_top, right_bottom );
      self.change_add( change );
      self
    }

    /// Get back to draw.
    #[ inline ]
    pub fn draw( self ) -> DrawChanger
    {
      self.draw
    }

    /// Get back to context.
    #[ inline ]
    pub fn context( self ) -> ContextChanger
    {
      self.draw.context_changer
    }

  }

  impl ChangerInterface for RectChanger
  {

    type Parent = DrawChanger;
    type Root = ContextChanger;

    fn context( self ) -> Self::Root
    {
      self.draw.context_changer
    }

    fn parent( &mut self ) -> &mut Self::Parent
    {
      &mut self.draw
    }

    fn end( self ) -> Self::Parent
    {
      self.draw
    }

  }

  impl HasIdInterface for RectChanger
  {
    #[ inline ]
    fn id( &self ) -> Id
    {
      self.draw.id()
    }
  }

}

/// Protected namespace of the module.
pub mod protected
{
  pub use super::orphan::*;
}

pub use protected::*;

/// Parented namespace of the module.
pub mod orphan
{
  pub use super::
  {
    exposed::*,
  };
}

/// Exposed namespace of the module.
pub mod exposed
{
  pub use super::
  {
    prelude::*,
    private::RectChanger,
  };
}

pub use exposed::*;

/// Prelude to use essentials: `use my_module::prelude::*`.
pub mod prelude
{
  pub use super::private::
  {
  };
}