Add allow-invalid configuration option for disallowed_* to the documentation

Author: alex-semenyuk

CHANGELOG.md

@@ -6386,6 +6386,7 @@ Released 2018-09-13
 [`allow-expect-in-consts`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-expect-in-consts
 [`allow-expect-in-tests`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-expect-in-tests
 [`allow-indexing-slicing-in-tests`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-indexing-slicing-in-tests
+[`allow-invalid`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-invalid
 [`allow-mixed-uninlined-format-args`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-mixed-uninlined-format-args
 [`allow-one-hash-in-raw-strings`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-one-hash-in-raw-strings
 [`allow-panic-in-tests`]: https://doc.rust-lang.org/clippy/lint_configuration.html#allow-panic-in-tests

book/src/lint_configuration.md

@@ -101,6 +101,35 @@ Whether `indexing_slicing` should be allowed in test functions or `#[cfg(test)]`
 * [`indexing_slicing`](https://rust-lang.github.io/rust-clippy/master/index.html#indexing_slicing)
 
 
+## `allow-invalid`
+Whether to allow invalid entries in disallowed_* settings
+
+When this option is set to `true`, Clippy will ignore invalid entries in
+`disallowed_methods`, `disallowed_types`, `disallowed_macros`, etc. instead of
+emitting a diagnostic error.
+
+#### Example
+
+```toml
+allow-invalid = true
+disallowed-methods = [
+  # This would normally error if the path is incorrect, but with allow-invalid = true,
+  # it will be silently ignored
+  { path = "std::fs::InvalidPath", reason = "use alternative instead" },
+]
+```
+
+**Default Value:** `false`
+
+---
+**Affected lints:**
+* [`disallowed_macros`](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_macros)
+* [`disallowed_methods`](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_methods)
+* [`disallowed_names`](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_names)
+* [`disallowed_types`](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_types)
+* [`disallowed_script_idents`](https://rust-lang.github.io/rust-clippy/master/index.html#disallowed_script_idents)
+
+
 ## `allow-mixed-uninlined-format-args`
 Whether to allow mixed uninlined format args, e.g. `format!("{} {}", a, foo.bar)`
 

clippy_config/src/conf.rs

@@ -227,6 +227,7 @@ macro_rules! define_Conf {
         $(#[default_text = $default_text:expr])?
         $(#[disallowed_paths_allow_replacements = $replacements_allowed:expr])?
         $(#[lints($($for_lints:ident),* $(,)?)])?
+        $(#[allow_invalid])?
         $name:ident: $ty:ty = $default:expr,
     )*) => {
         /// Clippy lint configuration
@@ -369,6 +370,24 @@ define_Conf! {
     /// Whether `indexing_slicing` should be allowed in test functions or `#[cfg(test)]`
     #[lints(indexing_slicing)]
     allow_indexing_slicing_in_tests: bool = false,
+    /// Whether to allow invalid entries in disallowed_* settings
+    ///
+    /// When this option is set to `true`, Clippy will ignore invalid entries in
+    /// `disallowed_methods`, `disallowed_types`, `disallowed_macros`, etc. instead of
+    /// emitting a diagnostic error.
+    ///
+    /// #### Example
+    ///
+    /// ```toml
+    /// allow-invalid = true
+    /// disallowed-methods = [
+    ///   # This would normally error if the path is incorrect, but with allow-invalid = true,
+    ///   # it will be silently ignored
+    ///   { path = "std::fs::InvalidPath", reason = "use alternative instead" },
+    /// ]
+    /// ```
+    #[lints(disallowed_macros, disallowed_methods, disallowed_names, disallowed_script_idents, disallowed_types)]
+    allow_invalid: bool = false,
     /// Whether to allow mixed uninlined format args, e.g. `format!("{} {}", a, foo.bar)`
     #[lints(uninlined_format_args)]
     allow_mixed_uninlined_format_args: bool = true,

tests/ui-toml/toml_unknown_key/conf_unknown_key.stderr

@@ -8,6 +8,7 @@ error: error reading Clippy's configuration file: unknown field `foobar`, expect
            allow-expect-in-consts
            allow-expect-in-tests
            allow-indexing-slicing-in-tests
+           allow-invalid
            allow-mixed-uninlined-format-args
            allow-one-hash-in-raw-strings
            allow-panic-in-tests
@@ -100,6 +101,7 @@ error: error reading Clippy's configuration file: unknown field `barfoo`, expect
            allow-expect-in-consts
            allow-expect-in-tests
            allow-indexing-slicing-in-tests
+           allow-invalid
            allow-mixed-uninlined-format-args
            allow-one-hash-in-raw-strings
            allow-panic-in-tests
@@ -192,6 +194,7 @@ error: error reading Clippy's configuration file: unknown field `allow_mixed_uni
            allow-expect-in-consts
            allow-expect-in-tests
            allow-indexing-slicing-in-tests
+           allow-invalid
            allow-mixed-uninlined-format-args
            allow-one-hash-in-raw-strings
            allow-panic-in-tests