rename unchecked_duration_subtraction to unchecked_time_subtraction and check for Duration - Duration (rust-lang#13800)

fixes rust-lang/rust-clippy#13734

This PR renames `unchecked_duration_subtraction` lint to
`unchecked_time_subtraction` and extends it to include `Duration -
Duration` operations. Previously, it was only `Instant - Duration`.
`Duration - Duration` is a common operation which may panic in the same
way.

Note: This is my first clippy PR, feedback is appreciated.

changelog: [`unchecked_time_subtraction`]: renamed from
`unchecked_duration_subtraction`, extend lint to include subtraction of
a `Duration` with a `Duration`

Author: Jarcho

CHANGELOG.md

@@ -6704,6 +6704,7 @@ Released 2018-09-13
 [`type_repetition_in_bounds`]: https://rust-lang.github.io/rust-clippy/master/index.html#type_repetition_in_bounds
 [`unbuffered_bytes`]: https://rust-lang.github.io/rust-clippy/master/index.html#unbuffered_bytes
 [`unchecked_duration_subtraction`]: https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_duration_subtraction
+[`unchecked_time_subtraction`]: https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_time_subtraction
 [`unconditional_recursion`]: https://rust-lang.github.io/rust-clippy/master/index.html#unconditional_recursion
 [`undocumented_unsafe_blocks`]: https://rust-lang.github.io/rust-clippy/master/index.html#undocumented_unsafe_blocks
 [`undropped_manually_drops`]: https://rust-lang.github.io/rust-clippy/master/index.html#undropped_manually_drops

book/src/lint_configuration.md

@@ -895,7 +895,7 @@ The minimum rust version that the project supports. Defaults to the `rust-versio
 * [`transmute_ptr_to_ref`](https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ref)
 * [`tuple_array_conversions`](https://rust-lang.github.io/rust-clippy/master/index.html#tuple_array_conversions)
 * [`type_repetition_in_bounds`](https://rust-lang.github.io/rust-clippy/master/index.html#type_repetition_in_bounds)
-* [`unchecked_duration_subtraction`](https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_duration_subtraction)
+* [`unchecked_time_subtraction`](https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_time_subtraction)
 * [`uninlined_format_args`](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args)
 * [`unnecessary_lazy_evaluations`](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_lazy_evaluations)
 * [`unnested_or_patterns`](https://rust-lang.github.io/rust-clippy/master/index.html#unnested_or_patterns)

clippy_config/src/conf.rs

@@ -791,7 +791,7 @@ define_Conf! {
         transmute_ptr_to_ref,
         tuple_array_conversions,
         type_repetition_in_bounds,
-        unchecked_duration_subtraction,
+        unchecked_time_subtraction,
         uninlined_format_args,
         unnecessary_lazy_evaluations,
         unnested_or_patterns,

clippy_lints/src/declared_lints.rs

@@ -226,8 +226,6 @@ pub static LINTS: &[&::declare_clippy_lint::LintInfo] = &[
     crate::inherent_to_string::INHERENT_TO_STRING_SHADOW_DISPLAY_INFO,
     crate::init_numbered_fields::INIT_NUMBERED_FIELDS_INFO,
     crate::inline_fn_without_body::INLINE_FN_WITHOUT_BODY_INFO,
-    crate::instant_subtraction::MANUAL_INSTANT_ELAPSED_INFO,
-    crate::instant_subtraction::UNCHECKED_DURATION_SUBTRACTION_INFO,
     crate::int_plus_one::INT_PLUS_ONE_INFO,
     crate::integer_division_remainder_used::INTEGER_DIVISION_REMAINDER_USED_INFO,
     crate::invalid_upcast_comparisons::INVALID_UPCAST_COMPARISONS_INFO,
@@ -705,6 +703,8 @@ pub static LINTS: &[&::declare_clippy_lint::LintInfo] = &[
     crate::tabs_in_doc_comments::TABS_IN_DOC_COMMENTS_INFO,
     crate::temporary_assignment::TEMPORARY_ASSIGNMENT_INFO,
     crate::tests_outside_test_module::TESTS_OUTSIDE_TEST_MODULE_INFO,
+    crate::time_subtraction::MANUAL_INSTANT_ELAPSED_INFO,
+    crate::time_subtraction::UNCHECKED_TIME_SUBTRACTION_INFO,
     crate::to_digit_is_some::TO_DIGIT_IS_SOME_INFO,
     crate::to_string_trait_impl::TO_STRING_TRAIT_IMPL_INFO,
     crate::toplevel_ref_arg::TOPLEVEL_REF_ARG_INFO,

clippy_lints/src/deprecated_lints.rs

@@ -184,6 +184,8 @@ declare_with_version! { RENAMED(RENAMED_VERSION) = [
     ("clippy::transmute_int_to_float", "unnecessary_transmutes"),
     #[clippy::version = "1.88.0"]
     ("clippy::transmute_num_to_bytes", "unnecessary_transmutes"),
+    #[clippy::version = "1.90.0"]
+    ("clippy::unchecked_duration_subtraction", "clippy::unchecked_time_subtraction"),
     #[clippy::version = ""]
     ("clippy::undropped_manually_drops", "undropped_manually_drops"),
     #[clippy::version = ""]

clippy_lints/src/instant_subtraction.rs

@@ -176,7 +176,6 @@ mod inherent_impl;
 mod inherent_to_string;
 mod init_numbered_fields;
 mod inline_fn_without_body;
-mod instant_subtraction;
 mod int_plus_one;
 mod integer_division_remainder_used;
 mod invalid_upcast_comparisons;
@@ -357,6 +356,7 @@ mod swap_ptr_to_ref;
 mod tabs_in_doc_comments;
 mod temporary_assignment;
 mod tests_outside_test_module;
+mod time_subtraction;
 mod to_digit_is_some;
 mod to_string_trait_impl;
 mod toplevel_ref_arg;
@@ -718,7 +718,7 @@ pub fn register_lint_passes(store: &mut rustc_lint::LintStore, conf: &'static Co
     store.register_late_pass(move |_| Box::new(manual_rotate::ManualRotate));
     store.register_late_pass(move |_| Box::new(operators::Operators::new(conf)));
     store.register_late_pass(move |_| Box::new(std_instead_of_core::StdReexports::new(conf)));
-    store.register_late_pass(move |_| Box::new(instant_subtraction::InstantSubtraction::new(conf)));
+    store.register_late_pass(move |_| Box::new(time_subtraction::UncheckedTimeSubtraction::new(conf)));
     store.register_late_pass(|_| Box::new(partialeq_to_none::PartialeqToNone));
     store.register_late_pass(move |_| Box::new(manual_abs_diff::ManualAbsDiff::new(conf)));
     store.register_late_pass(move |_| Box::new(manual_clamp::ManualClamp::new(conf)));