Add remaining skip UI tests

Author: daxpedda

non-msrv-tests/tests/ui/item_skip.rs

@@ -26,6 +26,12 @@ struct EmptySkipInner<T>(PhantomData<T>);
 #[derive_where(skip_inner(Debug))]
 struct OverridingSkipInner<T>(PhantomData<T>);
 
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+#[derive_where(skip_inner(Debug))]
+#[derive_where(skip_inner)]
+struct UnderridingSkipInner<T>(PhantomData<T>);
+
 #[derive(DeriveWhere)]
 #[derive_where(Clone; T)]
 #[derive_where(skip_inner)]

non-msrv-tests/tests/ui/item_skip.stderr

@@ -22,32 +22,38 @@ error: unexpected constraint on `skip` when unconstrained `skip` already used
 26 | #[derive_where(skip_inner(Debug))]
    |                ^^^^^^^^^^^^^^^^^
 
+error: duplicate `skip_inner` option
+  --> tests/ui/item_skip.rs:32:16
+   |
+32 | #[derive_where(skip_inner)]
+   |                ^^^^^^^^^^
+
 error: no trait that can be skipped is being implemented
-  --> tests/ui/item_skip.rs:31:16
+  --> tests/ui/item_skip.rs:37:16
    |
-31 | #[derive_where(skip_inner)]
+37 | #[derive_where(skip_inner)]
    |                ^^^^^^^^^^
 
 error: unsupported `Clone` constraint on `skip`
-  --> tests/ui/item_skip.rs:36:27
+  --> tests/ui/item_skip.rs:42:27
    |
-36 | #[derive_where(skip_inner(Clone))]
+42 | #[derive_where(skip_inner(Clone))]
    |                           ^^^^^
 
 error: duplicate `Debug` constraint on `skip`
-  --> tests/ui/item_skip.rs:41:34
+  --> tests/ui/item_skip.rs:47:34
    |
-41 | #[derive_where(skip_inner(Debug, Debug))]
+47 | #[derive_where(skip_inner(Debug, Debug))]
    |                                  ^^^^^
 
 error: duplicate `Debug` constraint on `skip`
-  --> tests/ui/item_skip.rs:47:27
+  --> tests/ui/item_skip.rs:53:27
    |
-47 | #[derive_where(skip_inner(Debug))]
+53 | #[derive_where(skip_inner(Debug))]
    |                           ^^^^^
 
 error: trait to be skipped isn't being implemented
-  --> tests/ui/item_skip.rs:52:27
+  --> tests/ui/item_skip.rs:58:27
    |
-52 | #[derive_where(skip_inner(Debug))]
+58 | #[derive_where(skip_inner(Debug))]
    |                           ^^^^^

non-msrv-tests/tests/ui/skip.rs

@@ -0,0 +1,61 @@
+use std::marker::PhantomData;
+
+use derive_where::DeriveWhere;
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct DuplicateSkipSame<T>(#[derive_where(skip, skip)] PhantomData<T>);
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct DuplicateSkipSeparate<T>(
+	#[derive_where(skip)]
+	#[derive_where(skip)]
+	PhantomData<T>,
+);
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct EmptySkip<T>(#[derive_where(skip())] PhantomData<T>);
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct OverridingSkip<T>(
+	#[derive_where(skip)]
+	#[derive_where(skip(Debug))]
+	PhantomData<T>,
+);
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct UnderridingSkip<T>(
+	#[derive_where(skip(Debug))]
+	#[derive_where(skip)]
+	PhantomData<T>,
+);
+
+#[derive(DeriveWhere)]
+#[derive_where(Clone; T)]
+struct NoSupportedTrait<T>(#[derive_where(skip)] PhantomData<T>);
+
+#[derive(DeriveWhere)]
+#[derive_where(Clone; T)]
+struct UnsupportedTrait<T>(#[derive_where(skip(Clone))] PhantomData<T>);
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct DuplicateTraitSame<T>(#[derive_where(skip(Debug, Debug))] PhantomData<T>);
+
+#[derive(DeriveWhere)]
+#[derive_where(Debug)]
+struct DuplicateTraitSeparate<T>(
+	#[derive_where(skip(Debug))]
+	#[derive_where(skip(Debug))]
+	PhantomData<T>,
+);
+
+#[derive(DeriveWhere)]
+#[derive_where(Clone; T)]
+struct MissingDeriveTrait<T>(#[derive_where(skip(Debug))] PhantomData<T>);
+
+fn main() {}

non-msrv-tests/tests/ui/skip.stderr

@@ -0,0 +1,59 @@
+error: duplicate `skip` option
+ --> tests/ui/skip.rs:7:50
+  |
+7 | struct DuplicateSkipSame<T>(#[derive_where(skip, skip)] PhantomData<T>);
+  |                                                  ^^^^
+
+error: duplicate `skip` option
+  --> tests/ui/skip.rs:13:17
+   |
+13 |     #[derive_where(skip)]
+   |                    ^^^^
+
+error: empty attribute option found
+  --> tests/ui/skip.rs:19:36
+   |
+19 | struct EmptySkip<T>(#[derive_where(skip())] PhantomData<T>);
+   |                                    ^^^^^^
+
+error: unexpected constraint on `skip` when unconstrained `skip` already used
+  --> tests/ui/skip.rs:25:17
+   |
+25 |     #[derive_where(skip(Debug))]
+   |                    ^^^^^^^^^^^
+
+error: duplicate `skip` option
+  --> tests/ui/skip.rs:33:17
+   |
+33 |     #[derive_where(skip)]
+   |                    ^^^^
+
+error: no trait that can be skipped is being implemented
+  --> tests/ui/skip.rs:39:43
+   |
+39 | struct NoSupportedTrait<T>(#[derive_where(skip)] PhantomData<T>);
+   |                                           ^^^^
+
+error: unsupported `Clone` constraint on `skip`
+  --> tests/ui/skip.rs:43:48
+   |
+43 | struct UnsupportedTrait<T>(#[derive_where(skip(Clone))] PhantomData<T>);
+   |                                                ^^^^^
+
+error: duplicate `Debug` constraint on `skip`
+  --> tests/ui/skip.rs:47:57
+   |
+47 | struct DuplicateTraitSame<T>(#[derive_where(skip(Debug, Debug))] PhantomData<T>);
+   |                                                         ^^^^^
+
+error: duplicate `Debug` constraint on `skip`
+  --> tests/ui/skip.rs:53:22
+   |
+53 |     #[derive_where(skip(Debug))]
+   |                         ^^^^^
+
+error: trait to be skipped isn't being implemented
+  --> tests/ui/skip.rs:59:50
+   |
+59 | struct MissingDeriveTrait<T>(#[derive_where(skip(Debug))] PhantomData<T>);
+   |                                                  ^^^^^