Add todo and tests

Author: Licenser

CHANGELOG.md

@@ -1137,6 +1137,7 @@ Released 2018-09-13
 [`or_fun_call`]: https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
 [`out_of_bounds_indexing`]: https://rust-lang.github.io/rust-clippy/master/index.html#out_of_bounds_indexing
 [`overflow_check_conditional`]: https://rust-lang.github.io/rust-clippy/master/index.html#overflow_check_conditional
+[`panic`]: https://rust-lang.github.io/rust-clippy/master/index.html#panic
 [`panic_params`]: https://rust-lang.github.io/rust-clippy/master/index.html#panic_params
 [`panicking_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#panicking_unwrap
 [`partialeq_ne_impl`]: https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
@@ -1197,6 +1198,7 @@ Released 2018-09-13
 [`suspicious_unary_op_formatting`]: https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_unary_op_formatting
 [`temporary_assignment`]: https://rust-lang.github.io/rust-clippy/master/index.html#temporary_assignment
 [`temporary_cstring_as_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#temporary_cstring_as_ptr
+[`todo`]: https://rust-lang.github.io/rust-clippy/master/index.html#todo
 [`too_many_arguments`]: https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
 [`too_many_lines`]: https://rust-lang.github.io/rust-clippy/master/index.html#too_many_lines
 [`toplevel_ref_arg`]: https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
@@ -1226,6 +1228,7 @@ Released 2018-09-13
 [`unnecessary_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
 [`unneeded_field_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
 [`unneeded_wildcard_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_wildcard_pattern
+[`unreachable`]: https://rust-lang.github.io/rust-clippy/master/index.html#unreachable
 [`unreadable_literal`]: https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
 [`unsafe_removed_from_name`]: https://rust-lang.github.io/rust-clippy/master/index.html#unsafe_removed_from_name
 [`unsafe_vector_initialization`]: https://rust-lang.github.io/rust-clippy/master/index.html#unsafe_vector_initialization

README.md

@@ -6,7 +6,7 @@
 
 A collection of lints to catch common mistakes and improve your [Rust](https://github.com/rust-lang/rust) code.
 
-[There are 325 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html)
+[There are 328 lints included in this crate!](https://rust-lang.github.io/rust-clippy/master/index.html)
 
 We have a bunch of lint categories to allow you to choose how much Clippy is supposed to ~~annoy~~ help you:
 

clippy_lints/src/lib.rs

@@ -629,7 +629,10 @@ pub fn register_plugins(reg: &mut rustc_driver::plugin::Registry<'_>, conf: &Con
         misc::FLOAT_CMP_CONST,
         missing_doc::MISSING_DOCS_IN_PRIVATE_ITEMS,
         missing_inline::MISSING_INLINE_IN_PUBLIC_ITEMS,
+        panic_unimplemented::PANIC,
+        panic_unimplemented::TODO,
         panic_unimplemented::UNIMPLEMENTED,
+        panic_unimplemented::UNREACHABLE,
         shadow::SHADOW_REUSE,
         shadow::SHADOW_SAME,
         strings::STRING_ADD,

clippy_lints/src/panic_unimplemented.rs

@@ -57,6 +57,22 @@ declare_clippy_lint! {
     "`unimplemented!` should not be present in production code"
 }
 
+declare_clippy_lint! {
+    /// **What it does:** Checks for usage of `todo!`.
+    ///
+    /// **Why is this bad?** This macro should not be present in production code
+    ///
+    /// **Known problems:** None.
+    ///
+    /// **Example:**
+    /// ```no_run
+    /// todo!();
+    /// ```
+    pub TODO,
+    restriction,
+    "`todo!` should not be present in production code"
+}
+
 declare_clippy_lint! {
     /// **What it does:** Checks for usage of `unreachable!`.
     ///
@@ -73,7 +89,7 @@ declare_clippy_lint! {
     "`unreachable!` should not be present in production code"
 }
 
-declare_lint_pass!(PanicUnimplemented => [PANIC_PARAMS, UNIMPLEMENTED, UNREACHABLE]);
+declare_lint_pass!(PanicUnimplemented => [PANIC_PARAMS, UNIMPLEMENTED, UNREACHABLE, TODO, PANIC]);
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PanicUnimplemented {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
@@ -87,6 +103,10 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PanicUnimplemented {
                     let span = get_outer_span(expr);
                     span_lint(cx, UNIMPLEMENTED, span,
                               "`unimplemented` should not be present in production code");
+                } else if is_expn_of(expr.span, "todo").is_some() {
+                    let span = get_outer_span(expr);
+                    span_lint(cx, TODO, span,
+                              "`todo` should not be present in production code");
                 } else if is_expn_of(expr.span, "unreachable").is_some() {
                     let span = get_outer_span(expr);
                     span_lint(cx, UNREACHABLE, span,
@@ -95,7 +115,6 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PanicUnimplemented {
                     let span = get_outer_span(expr);
                     span_lint(cx, PANIC, span,
                               "`panic` should not be present in production code");
-                //} else {
                     match_panic(params, expr, cx);
                 }
             }

src/lintlist/mod.rs

@@ -6,7 +6,7 @@ pub use lint::Lint;
 pub use lint::LINT_LEVELS;
 
 // begin lint list, do not remove this comment, it’s used in `update_lints`
-pub const ALL_LINTS: [Lint; 325] = [
+pub const ALL_LINTS: [Lint; 328] = [
     Lint {
         name: "absurd_extreme_comparisons",
         group: "correctness",
@@ -1449,6 +1449,13 @@ pub const ALL_LINTS: [Lint; 325] = [
         deprecation: None,
         module: "overflow_check_conditional",
     },
+    Lint {
+        name: "panic",
+        group: "restriction",
+        desc: "missing parameters in `panic!` calls",
+        deprecation: None,
+        module: "panic_unimplemented",
+    },
     Lint {
         name: "panic_params",
         group: "style",
@@ -1841,6 +1848,13 @@ pub const ALL_LINTS: [Lint; 325] = [
         deprecation: None,
         module: "methods",
     },
+    Lint {
+        name: "todo",
+        group: "restriction",
+        desc: "`todo!` should not be present in production code",
+        deprecation: None,
+        module: "panic_unimplemented",
+    },
     Lint {
         name: "too_many_arguments",
         group: "complexity",
@@ -2044,6 +2058,13 @@ pub const ALL_LINTS: [Lint; 325] = [
         deprecation: None,
         module: "misc_early",
     },
+    Lint {
+        name: "unreachable",
+        group: "restriction",
+        desc: "`unreachable!` should not be present in production code",
+        deprecation: None,
+        module: "panic_unimplemented",
+    },
     Lint {
         name: "unreadable_literal",
         group: "style",

tests/ui/panic.rs

@@ -0,0 +1,12 @@
+#![warn(clippy::panic)]
+#![allow(clippy::assertions_on_constants)]
+
+fn panic() {
+    let a = 2;
+    panic!();
+    let b = a + 2;
+}
+
+fn main() {
+    panic();
+}

tests/ui/panic.stderr

@@ -0,0 +1,10 @@
+error: `panic` should not be present in production code
+  --> $DIR/panic.rs:6:5
+   |
+LL |     panic!();
+   |     ^^^^^^^^^
+   |
+   = note: `-D clippy::panic` implied by `-D warnings`
+
+error: aborting due to previous error
+

tests/ui/panic_unimplemented.rs

@@ -1,4 +1,4 @@
-#![warn(clippy::panic_params, clippy::unimplemented, clippy::unreachable)]
+#![warn(clippy::panic_params, clippy::unimplemented, clippy::unreachable, clippy::todo)]
 #![allow(clippy::assertions_on_constants)]
 fn missing() {
     if true {
@@ -62,6 +62,12 @@ fn unreachable() {
     let b = a + 2;
 }
 
+fn todo() {
+    let a = 2;
+    todo!();
+    let b = a + 2;
+}
+
 fn main() {
     missing();
     ok_single();
@@ -72,4 +78,5 @@ fn main() {
     ok_escaped();
     unimplemented();
     unreachable();
+    todo();
 }

tests/ui/panic_unimplemented.stderr

@@ -40,5 +40,13 @@ LL |     unreachable!();
    |
    = note: `-D clippy::unreachable` implied by `-D warnings`
 
-error: aborting due to 6 previous errors
+error: `todo` should not be present in production code
+  --> $DIR/panic_unimplemented.rs:67:5
+   |
+LL |     todo!();
+   |     ^^^^^^^^
+   |
+   = note: `-D clippy::todo` implied by `-D warnings`
+
+error: aborting due to 7 previous errors