Enum Subject 

#[non_exhaustive]
pub enum Subject {
    Document,
    Catalog,
    Page(u32),
    Object(ObjRef),
    Resource {
        page: u32,
        name: String,
    },
}

What in the file broke a requirement.

Deliberately not a string. A converter that wants to repair a violation needs the ObjRef to reach the object; a caller that wants to tell a user which page to look at needs the index. Formatting either into a sentence throws that away and cannot be recovered.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Document

The document as a whole — the trailer, the header, or a property with no single object behind it.

Catalog

The document catalog.

Page(u32)

A page, by zero-based index.

Object(ObjRef)

A specific indirect object.

Resource

A named resource on a page: the page index and the resource’s name.

Fields

page: u32

The page the resource is reached from.

name: String

The name it has in that page’s resource dictionary.

Trait Implementations

impl Clone for Subject

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Subject

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Subject

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Subject

impl PartialEq for Subject

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Subject