warning: unused `std::result::Result` that must be used
   --> pdf/src/font.rs:669:17
    |
669 |                 writeln!(buf, "]");
    |                 ^^^^^^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: unused `std::result::Result` that must be used
   --> pdf/src/font.rs:652:21
    |
652 |                     writeln!(buf);
    |                     ^^^^^^^^^^^^^
    |
    = note: this `Result` may be an `Err` variant, which should be handled
    = note: this warning originates in the macro `$crate::write` which comes from the expansion of the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: unused `std::result::Result` that must be used
  --> pdf/src/backend.rs:95:17
   |
95 |                 refs.add_entries_from(section);
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled
   = note: `#[warn(unused_must_use)]` on by default
help: use `let _ = ...` to ignore the resulting value
   |
95 |                 let _ = refs.add_entries_from(section);
   |                 +++++++

warning: the borrowed expression implements the required traits
   --> pdf/src/crypt.rs:188:26
    |
188 |             hash.consume(&PADDING);
    |                          ^^^^^^^^ help: change this to: `PADDING`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow

warning: manual implementation of an assign operation
   --> pdf/src/enc.rs:421:13
    |
421 |             c = c + 2; // move cursor to next run
    |             ^^^^^^^^^ help: replace it with: `c += 2`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
    = note: `#[warn(clippy::assign_op_pattern)]` on by default

warning: the following explicit lifetimes could be elided: 'a
   --> pdf/src/build.rs:127:5
    |
127 |     pub fn new<'a>(fileoptions: FileOptions<'a, SC, OC, L>) -> Self {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
    = note: `#[warn(clippy::needless_lifetimes)]` on by default
help: elide the lifetimes
    |
127 -     pub fn new<'a>(fileoptions: FileOptions<'a, SC, OC, L>) -> Self {
127 +     pub fn new(fileoptions: FileOptions<'_, SC, OC, L>) -> Self {
    |

warning: redundant pattern matching, consider using `is_err()`
   --> pdf/src/font.rs:556:24
    |
556 |                 if let Err(_) = a {
    |                 -------^^^^^^---- help: try this: `if a.is_err()`
    |
    = note: this will change drop order of the result, as well as all temporaries
    = note: add `#[allow(clippy::redundant_pattern_matching)]` if this is important
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching

warning: redundant pattern matching, consider using `is_err()`
   --> pdf/src/font.rs:538:24
    |
538 |                 if let Err(_) = a {
    |                 -------^^^^^^---- help: try this: `if a.is_err()`
    |
    = note: this will change drop order of the result, as well as all temporaries
    = note: add `#[allow(clippy::redundant_pattern_matching)]` if this is important
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
    = note: `#[warn(clippy::redundant_pattern_matching)]` on by default

warning: struct `ToUnicodeMap` has a public `len` method, but no `is_empty` method
   --> pdf/src/font.rs:499:5
    |
499 |     pub fn len(&self) -> usize {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
    = note: `#[warn(clippy::len_without_is_empty)]` on by default

warning: you should consider adding a `Default` implementation for `ToUnicodeMap`
   --> pdf/src/font.rs:479:5
    |
479 | /     pub fn new() -> Self {
480 | |         ToUnicodeMap {
481 | |             inner: HashMap::new()
482 | |         }
483 | |     }
    | |_____^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
    = note: `#[warn(clippy::new_without_default)]` on by default
help: try adding this
    |
478 + impl Default for ToUnicodeMap {
479 +     fn default() -> Self {
480 +         Self::new()
481 +     }
482 + }
    |

warning: casting to the same type is unnecessary (`usize` -> `usize`)
   --> pdf/src/font.rs:300:38
    |
300 | ...                   for c in (c1 as usize) ..= (c2 as usize) {
    |                                ^^^^^^^^^^^^^ help: try: `c1`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast

warning: dereferencing a tuple pattern where every element takes a reference
   --> pdf/src/font.rs:281:30
    |
281 |                         Some(&Primitive::Array(ref array)) => {
    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrowed_reference
help: try removing the `&` and `ref` parts
    |
281 -                         Some(&Primitive::Array(ref array)) => {
281 +                         Some(Primitive::Array(array)) => {
    |

warning: deref which would be done by auto-deref
   --> pdf/src/parser/mod.rs:195:31
    |
195 |         let mut rest: &[u8] = &*first_lexeme.reslice(1..);
    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&first_lexeme.reslice(1..)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref

warning: casting to the same type is unnecessary (`usize` -> `usize`)
   --> pdf/src/parser/mod.rs:184:27
    |
184 |             lexer.set_pos(pos_bk as usize); // (roll back the lexer first)
    |                           ^^^^^^^^^^^^^^^ help: try: `pos_bk`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast

warning: casting to the same type is unnecessary (`usize` -> `usize`)
   --> pdf/src/parser/mod.rs:178:31
    |
178 |                 lexer.set_pos(pos_bk as usize); // (roll back the lexer first)
    |                               ^^^^^^^^^^^^^^^ help: try: `pos_bk`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast

warning: manual check for common ascii range
   --> pdf/src/parser/lexer/mod.rs:468:23
    |
468 |     b.iter().all(|&b| matches!(b, b'0'..=b'9'))
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b.is_ascii_digit()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_ascii_check

warning: manual check for common ascii range
   --> pdf/src/parser/lexer/mod.rs:429:56
    |
429 |         if let Some(len) = slice.iter().position(|&b| !matches!(b, b'0'..=b'9')) {
    |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b.is_ascii_digit()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_ascii_check
    = note: `#[warn(clippy::manual_is_ascii_check)]` on by default

warning: this expression creates a reference which is immediately dereferenced by the compiler
  --> pdf/src/content.rs:34:15
   |
34 |     ops.parse(&data, resolve)?;
   |               ^^^^^ help: change this to: `data`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow

warning: deref on an immutable reference
   --> pdf/src/primitive.rs:668:56
    |
668 |             Primitive::Name(ref s) => Ok(Cow::Borrowed(&*s)),
    |                                                        ^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrow_deref_ref
    = note: `#[warn(clippy::borrow_deref_ref)]` on by default
help: if you would like to reborrow, try removing `&*`
    |
668 |             Primitive::Name(ref s) => Ok(Cow::Borrowed(s)),
    |                                                        ~
help: if you would like to deref, try using `&**`
    |
668 |             Primitive::Name(ref s) => Ok(Cow::Borrowed(&**s)),
    |                                                        ~~~~

warning: dereferencing a tuple pattern where every element takes a reference
   --> pdf/src/primitive.rs:637:13
    |
637 |             &Primitive::Name(ref s) => Ok(Name(s.clone())),
    |             ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrowed_reference
    = note: `#[warn(clippy::needless_borrowed_reference)]` on by default
help: try removing the `&` and `ref` parts
    |
637 -             &Primitive::Name(ref s) => Ok(Name(s.clone())),
637 +             Primitive::Name(s) => Ok(Name(s.clone())),
    |

warning: this expression creates a reference which is immediately dereferenced by the compiler
   --> pdf/src/primitive.rs:268:31
    |
268 |                 out.write_all(&data)?;
    |                               ^^^^^ help: change this to: `data`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
    = note: `#[warn(clippy::needless_borrow)]` on by default

warning: casting to the same type is unnecessary (`u64` -> `u64`)
   --> pdf/src/xref.rs:138:58
    |
138 |                 XRef::Stream { stream_id, index } => (2, stream_id as u64, index as u64),
    |                                                          ^^^^^^^^^^^^^^^^ help: try: `stream_id`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast

warning: casting to the same type is unnecessary (`u64` -> `u64`)
   --> pdf/src/xref.rs:137:62
    |
137 |                 XRef::Raw { pos, gen_nr } => (1, pos as u64, gen_nr as u64),
    |                                                              ^^^^^^^^^^^^^ help: try: `gen_nr`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast

warning: casting to the same type is unnecessary (`u64` -> `u64`)
   --> pdf/src/xref.rs:136:72
    |
136 |                 XRef::Free { next_obj_nr, gen_nr } => (0, next_obj_nr, gen_nr as u64),
    |                                                                        ^^^^^^^^^^^^^ help: try: `gen_nr`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast

warning: casting to the same type is unnecessary (`u64` -> `u64`)
   --> pdf/src/xref.rs:100:55
    |
100 |                 XRef::Stream { stream_id, index } => (stream_id as u64, index as u64),
    |                                                       ^^^^^^^^^^^^^^^^ help: try: `stream_id`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast