Skip to main content Module must_use Copy item path Source UnusedResults IsTyMustUse Must the type be used? MustUsePath A path through a type to a must_use source. Contains useful info for the lint. UNUSED_MUST_USE The unused_must_use lint detects unused result of a type flagged as
#[must_use]. UNUSED_RESULTS The unused_results lint checks for the unused result of an
expression in a statement. check_fn_must_use 🔒 Checks if expr is a [method] call expression marked as #[must_use] and emits a lint if so.
Returns true if the lint has been emitted. check_must_use_def 🔒 Returns whether further errors should be suppressed because a lint has been emitted. emit_must_use_untranslated 🔒 is_def_must_use 🔒 is_ty_must_use Returns Some(path) if ty should be considered as “must_use” in the context of expr
(expr is used to get the parent module, which can affect which types are considered uninhabited).