use crate::error::TexError;
use crate::Element;
use crate::*;
pub trait Attach {
fn attach(&mut self, element: Element) -> Result<(), TexError>;
}
impl Attach for Part {
fn attach(&mut self, element: Element) -> Result<(), TexError> {
if element.rank() > 0 {
return Ok(self.1.push(element));
}
return Err(TexError::RankError);
}
}
impl Attach for Chapter {
fn attach(&mut self, element: Element) -> Result<(), TexError> {
if element.rank() > 1 {
return Ok(self.1.push(element));
}
return Err(TexError::RankError);
}
}
impl Attach for Section {
fn attach(&mut self, element: Element) -> Result<(), TexError> {
if element.rank() > 2 {
return Ok(self.1.push(element));
}
return Err(TexError::RankError);
}
}
impl Attach for Paragraph {
fn attach(&mut self, element: Element) -> Result<(), TexError> {
if element.rank() > 3 {
return Ok(self.1.as_mut().unwrap().push(element));
}
return Err(TexError::RankError);
}
}
impl Attach for Environment {
fn attach(&mut self, element: Element) -> Result<(), TexError> {
if element.rank() > 7 {
return Ok(self.1.push(String::from(element)));
}
return Err(TexError::RankError);
}
}