warning: unused `std::result::Result` that must be used --> mfm_machine/src/state_machine/mod.rs:140:9 | 140 | / self.tracker.as_mut().track( 141 | | Index::new(next_state_index, state.label(), state.tags()), 142 | | context.clone(), 143 | | ); | |_________^ | = 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 | 140 | let _ = self.tracker.as_mut().track( | +++++++

warning: struct `TrackerHistory` has a public `len` method, but no `is_empty` method --> mfm_machine/src/state_machine/tracker.rs:36:5 | 36 | 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 `TrackerHistory` --> mfm_machine/src/state_machine/tracker.rs:32:5 | 32 | / pub fn new() -> Self { 33 | | TrackerHistory(Vec::new()) 34 | | } | |_____^ | = 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 | 31 + impl Default for TrackerHistory { 32 + fn default() -> Self { 33 + Self::new() 34 + } 35 + } |

warning: `.map().collect()` can be replaced with `.try_for_each()` --> mfm_machine/src/state_machine/tracker.rs:18:9 | 18 | / self.0 19 | | .iter() 20 | | .map(|(history_id, index, _)| { 21 | | writeln!( ... | 26 | | }) 27 | | .collect() | |______________________^ | = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_collect_result_unit = note: `#[warn(clippy::map_collect_result_unit)]` on by default help: try | 18 ~ self.0 19 + .iter().try_for_each(|(history_id, index, _)| { 20 + writeln!( 21 + f, 22 + "history_id ({}); index ({:?}); context (ptr)", 23 + history_id, index 24 + ) 25 + }) |