Rollup merge of #77243 - Aaron1011:more-derive-test, r=petrochenkov

Test more attributes in test issue-75930-derive-cfg.rs

Split out from #76130

This tests our handling of combining derives, derive helper
attributes, attribute macros, and `cfg`/`cfg_attr`

Author: jonas-schievink

src/test/ui/proc-macro/issue-75930-derive-cfg.rs

@@ -1,29 +1,65 @@
 // check-pass
-// compile-flags: -Z span-debug
+// compile-flags: -Z span-debug --error-format human
 // aux-build:test-macros.rs
 
 // Regression test for issue #75930
 // Tests that we cfg-strip all targets before invoking
 // a derive macro
+// We need '--error-format human' to stop compiletest from
+// trying to interpret proc-macro output as JSON messages
+// (a pretty-printed struct may cause a line to start with '{' )
+// FIXME: We currently lose spans here (see issue #43081)
 
 #[macro_use]
 extern crate test_macros;
 
+#[print_helper(a)]
+#[cfg_attr(not(FALSE), allow(dead_code))]
+#[print_attr]
 #[derive(Print)]
+#[print_helper(b)]
 struct Foo<#[cfg(FALSE)] A, B> {
     #[cfg(FALSE)] first: String,
-    second: bool,
+    #[cfg_attr(FALSE, deny(warnings))] second: bool,
     third: [u8; {
         #[cfg(FALSE)] struct Bar;
         #[cfg(not(FALSE))] struct Inner;
         #[cfg(FALSE)] let a = 25;
         match true {
             #[cfg(FALSE)] true => {},
-            false => {},
+            #[cfg_attr(not(FALSE), allow(warnings))] false => {},
             _ => {}
         };
+
+        #[print_helper(should_be_removed)]
+        fn removed_fn() {
+            #![cfg(FALSE)]
+        }
+
+        #[print_helper(c)] #[cfg(not(FALSE))] fn kept_fn() {
+            #![cfg(not(FALSE))]
+            let my_val = true;
+        }
+
+        enum TupleEnum {
+            Foo(
+                #[cfg(FALSE)] u8,
+                #[cfg(FALSE)] bool,
+                #[cfg(not(FALSE))] i32,
+                #[cfg(FALSE)] String, u8
+            )
+        }
+
+        struct TupleStruct(
+            #[cfg(FALSE)] String,
+            #[cfg(not(FALSE))] i32,
+            #[cfg(FALSE)] bool,
+            u8
+        );
+
         0
     }],
+    #[print_helper(d)]
     fourth: B
 }