Do not run lints that cannot emit

Before this change, adding a lint was a difficult matter
because it always had some overhead involved. This was
because all lints would run, no matter their default level,
or if the user had #![allow]ed them. This PR changes that

23 files changed, 5 insertions, 0 deletions

diff --git a/src/tools/clippy/tests/ui/author.rs b/src/tools/clippy/tests/ui-internal/author.rs
index 0a1be356896..eb1f3e3f870 100644
--- a/src/tools/clippy/tests/ui/author.rs
+++ b/src/tools/clippy/tests/ui-internal/author.rs
@@ -1,3 +1,5 @@
+#![warn(clippy::author)]
+
 fn main() {
     #[clippy::author]
     let x: char = 0x45 as char;
diff --git a/src/tools/clippy/tests/ui/author.stdout b/src/tools/clippy/tests/ui-internal/author.stdout
index eed704e82fe..eed704e82fe 100644
--- a/src/tools/clippy/tests/ui/author.stdout
+++ b/src/tools/clippy/tests/ui-internal/author.stdout
diff --git a/src/tools/clippy/tests/ui/author/blocks.rs b/src/tools/clippy/tests/ui-internal/author/blocks.rs
index 164f7d0d9d6..164f7d0d9d6 100644
--- a/src/tools/clippy/tests/ui/author/blocks.rs
+++ b/src/tools/clippy/tests/ui-internal/author/blocks.rs
diff --git a/src/tools/clippy/tests/ui/author/blocks.stdout b/src/tools/clippy/tests/ui-internal/author/blocks.stdout
index 6bf48d5ba4e..6bf48d5ba4e 100644
--- a/src/tools/clippy/tests/ui/author/blocks.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/blocks.stdout
diff --git a/src/tools/clippy/tests/ui/author/call.rs b/src/tools/clippy/tests/ui-internal/author/call.rs
index e99c3c41dc4..e99c3c41dc4 100644
--- a/src/tools/clippy/tests/ui/author/call.rs
+++ b/src/tools/clippy/tests/ui-internal/author/call.rs
diff --git a/src/tools/clippy/tests/ui/author/call.stdout b/src/tools/clippy/tests/ui-internal/author/call.stdout
index 59d4da490fe..59d4da490fe 100644
--- a/src/tools/clippy/tests/ui/author/call.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/call.stdout
diff --git a/src/tools/clippy/tests/ui/author/if.rs b/src/tools/clippy/tests/ui-internal/author/if.rs
index 946088ab346..946088ab346 100644
--- a/src/tools/clippy/tests/ui/author/if.rs
+++ b/src/tools/clippy/tests/ui-internal/author/if.rs
diff --git a/src/tools/clippy/tests/ui/author/if.stdout b/src/tools/clippy/tests/ui-internal/author/if.stdout
index a85dcddd331..a85dcddd331 100644
--- a/src/tools/clippy/tests/ui/author/if.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/if.stdout
diff --git a/src/tools/clippy/tests/ui/author/issue_3849.rs b/src/tools/clippy/tests/ui-internal/author/issue_3849.rs
index 5f65746d71f..5f65746d71f 100644
--- a/src/tools/clippy/tests/ui/author/issue_3849.rs
+++ b/src/tools/clippy/tests/ui-internal/author/issue_3849.rs
diff --git a/src/tools/clippy/tests/ui/author/issue_3849.stdout b/src/tools/clippy/tests/ui-internal/author/issue_3849.stdout
index a5a8c0304ee..a5a8c0304ee 100644
--- a/src/tools/clippy/tests/ui/author/issue_3849.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/issue_3849.stdout
diff --git a/src/tools/clippy/tests/ui/author/loop.rs b/src/tools/clippy/tests/ui-internal/author/loop.rs
index ff5b6100117..ff5b6100117 100644
--- a/src/tools/clippy/tests/ui/author/loop.rs
+++ b/src/tools/clippy/tests/ui-internal/author/loop.rs
diff --git a/src/tools/clippy/tests/ui/author/loop.stdout b/src/tools/clippy/tests/ui-internal/author/loop.stdout
index 609d2491061..609d2491061 100644
--- a/src/tools/clippy/tests/ui/author/loop.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/loop.stdout
diff --git a/src/tools/clippy/tests/ui/author/macro_in_closure.rs b/src/tools/clippy/tests/ui-internal/author/macro_in_closure.rs
index 444e6a12165..444e6a12165 100644
--- a/src/tools/clippy/tests/ui/author/macro_in_closure.rs
+++ b/src/tools/clippy/tests/ui-internal/author/macro_in_closure.rs
diff --git a/src/tools/clippy/tests/ui/author/macro_in_closure.stdout b/src/tools/clippy/tests/ui-internal/author/macro_in_closure.stdout
index 66caf382d89..66caf382d89 100644
--- a/src/tools/clippy/tests/ui/author/macro_in_closure.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/macro_in_closure.stdout
diff --git a/src/tools/clippy/tests/ui/author/macro_in_loop.rs b/src/tools/clippy/tests/ui-internal/author/macro_in_loop.rs
index 8a520501f8d..8a520501f8d 100644
--- a/src/tools/clippy/tests/ui/author/macro_in_loop.rs
+++ b/src/tools/clippy/tests/ui-internal/author/macro_in_loop.rs
diff --git a/src/tools/clippy/tests/ui/author/macro_in_loop.stdout b/src/tools/clippy/tests/ui-internal/author/macro_in_loop.stdout
index 3f9be297c33..3f9be297c33 100644
--- a/src/tools/clippy/tests/ui/author/macro_in_loop.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/macro_in_loop.stdout
diff --git a/src/tools/clippy/tests/ui/author/matches.rs b/src/tools/clippy/tests/ui-internal/author/matches.rs
index 674e07ec2d3..674e07ec2d3 100644
--- a/src/tools/clippy/tests/ui/author/matches.rs
+++ b/src/tools/clippy/tests/ui-internal/author/matches.rs
diff --git a/src/tools/clippy/tests/ui/author/matches.stdout b/src/tools/clippy/tests/ui-internal/author/matches.stdout
index 91b3b6f6877..91b3b6f6877 100644
--- a/src/tools/clippy/tests/ui/author/matches.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/matches.stdout
diff --git a/src/tools/clippy/tests/ui/author/repeat.rs b/src/tools/clippy/tests/ui-internal/author/repeat.rs
index d8e9d589e68..d8e9d589e68 100644
--- a/src/tools/clippy/tests/ui/author/repeat.rs
+++ b/src/tools/clippy/tests/ui-internal/author/repeat.rs
diff --git a/src/tools/clippy/tests/ui/author/repeat.stdout b/src/tools/clippy/tests/ui-internal/author/repeat.stdout
index d9e3f864f12..d9e3f864f12 100644
--- a/src/tools/clippy/tests/ui/author/repeat.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/repeat.stdout
diff --git a/src/tools/clippy/tests/ui/author/struct.rs b/src/tools/clippy/tests/ui-internal/author/struct.rs
index a99bdfc1313..a99bdfc1313 100644
--- a/src/tools/clippy/tests/ui/author/struct.rs
+++ b/src/tools/clippy/tests/ui-internal/author/struct.rs
diff --git a/src/tools/clippy/tests/ui/author/struct.stdout b/src/tools/clippy/tests/ui-internal/author/struct.stdout
index 0b332d5e7d0..0b332d5e7d0 100644
--- a/src/tools/clippy/tests/ui/author/struct.stdout
+++ b/src/tools/clippy/tests/ui-internal/author/struct.stdout
diff --git a/src/tools/clippy/tests/ui/no_lints.rs b/src/tools/clippy/tests/ui/no_lints.rs
new file mode 100644
index 00000000000..a8467bb6ef7
--- /dev/null
+++ b/src/tools/clippy/tests/ui/no_lints.rs
@@ -0,0 +1,3 @@
+#![deny(clippy::all)]
+
+fn main() {}
\ No newline at end of file