1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/conditional-compilation/cfg-generic-params.rs b/tests/ui/conditional-compilation/cfg-generic-params.rs
new file mode 100644
index 000000000..53aa35563
--- /dev/null
+++ b/tests/ui/conditional-compilation/cfg-generic-params.rs
@@ -0,0 +1,40 @@
+// compile-flags:--cfg yes
+
+fn f_lt<#[cfg(yes)] 'a: 'a, #[cfg(no)] T>() {}
+fn f_ty<#[cfg(no)] 'a: 'a, #[cfg(yes)] T>() {}
+
+type FnGood = for<#[cfg(yes)] 'a, #[cfg(no)] T> fn(); // OK
+type FnBad = for<#[cfg(no)] 'a, #[cfg(yes)] T> fn();
+//~^ ERROR only lifetime parameters can be used in this context
+
+type PolyGood = dyn for<#[cfg(yes)] 'a, #[cfg(no)] T> Copy; // OK
+type PolyBad = dyn for<#[cfg(no)] 'a, #[cfg(yes)] T> Copy;
+//~^ ERROR only lifetime parameters can be used in this context
+
+struct WhereGood where for<#[cfg(yes)] 'a, #[cfg(no)] T> u8: Copy; // OK
+struct WhereBad where for<#[cfg(no)] 'a, #[cfg(yes)] T> u8: Copy;
+//~^ ERROR only lifetime parameters can be used in this context
+
+fn f_lt_no<#[cfg_attr(no, unknown)] 'a>() {} // OK
+fn f_lt_yes<#[cfg_attr(yes, unknown)] 'a>() {}
+//~^ ERROR cannot find attribute `unknown` in this scope
+fn f_ty_no<#[cfg_attr(no, unknown)] T>() {} // OK
+fn f_ty_yes<#[cfg_attr(yes, unknown)] T>() {}
+//~^ ERROR cannot find attribute `unknown` in this scope
+
+type FnNo = for<#[cfg_attr(no, unknown)] 'a> fn(); // OK
+type FnYes = for<#[cfg_attr(yes, unknown)] 'a> fn();
+//~^ ERROR cannot find attribute `unknown` in this scope
+
+type PolyNo = dyn for<#[cfg_attr(no, unknown)] 'a> Copy; // OK
+type PolyYes = dyn for<#[cfg_attr(yes, unknown)] 'a> Copy;
+//~^ ERROR cannot find attribute `unknown` in this scope
+
+struct WhereNo where for<#[cfg_attr(no, unknown)] 'a> u8: Copy; // OK
+struct WhereYes where for<#[cfg_attr(yes, unknown)] 'a> u8: Copy;
+//~^ ERROR cannot find attribute `unknown` in this scope
+
+fn main() {
+    f_lt::<'static>();
+    f_ty::<u8>();
+}