1 files changed, 74 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/auxiliary/proc_macro_suspicious_else_formatting.rs b/src/tools/clippy/tests/ui/auxiliary/proc_macro_suspicious_else_formatting.rs
new file mode 100644
index 000000000..a2ef0fe82
--- /dev/null
+++ b/src/tools/clippy/tests/ui/auxiliary/proc_macro_suspicious_else_formatting.rs
@@ -0,0 +1,74 @@
+// compile-flags: --emit=link
+// no-prefer-dynamic
+
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+use proc_macro::{token_stream, Delimiter, Group, Ident, Span, TokenStream, TokenTree};
+
+fn read_ident(iter: &mut token_stream::IntoIter) -> Ident {
+    match iter.next() {
+        Some(TokenTree::Ident(i)) => i,
+        _ => panic!("expected ident"),
+    }
+}
+
+#[proc_macro_derive(DeriveBadSpan)]
+pub fn derive_bad_span(input: TokenStream) -> TokenStream {
+    let mut input = input.into_iter();
+    assert_eq!(read_ident(&mut input).to_string(), "struct");
+    let ident = read_ident(&mut input);
+    let mut tys = match input.next() {
+        Some(TokenTree::Group(g)) if g.delimiter() == Delimiter::Parenthesis => g.stream().into_iter(),
+        _ => panic!(),
+    };
+    let field1 = read_ident(&mut tys);
+    tys.next();
+    let field2 = read_ident(&mut tys);
+
+    <TokenStream as FromIterator<TokenTree>>::from_iter(
+        [
+            Ident::new("impl", Span::call_site()).into(),
+            ident.into(),
+            Group::new(
+                Delimiter::Brace,
+                <TokenStream as FromIterator<TokenTree>>::from_iter(
+                    [
+                        Ident::new("fn", Span::call_site()).into(),
+                        Ident::new("_foo", Span::call_site()).into(),
+                        Group::new(Delimiter::Parenthesis, TokenStream::new()).into(),
+                        Group::new(
+                            Delimiter::Brace,
+                            <TokenStream as FromIterator<TokenTree>>::from_iter(
+                                [
+                                    Ident::new("if", field1.span()).into(),
+                                    Ident::new("true", field1.span()).into(),
+                                    {
+                                        let mut group = Group::new(Delimiter::Brace, TokenStream::new());
+                                        group.set_span(field1.span());
+                                        group.into()
+                                    },
+                                    Ident::new("if", field2.span()).into(),
+                                    Ident::new("true", field2.span()).into(),
+                                    {
+                                        let mut group = Group::new(Delimiter::Brace, TokenStream::new());
+                                        group.set_span(field2.span());
+                                        group.into()
+                                    },
+                                ]
+                                .iter()
+                                .cloned(),
+                            ),
+                        )
+                        .into(),
+                    ]
+                    .iter()
+                    .cloned(),
+                ),
+            )
+            .into(),
+        ]
+        .iter()
+        .cloned(),
+    )
+}