Add hack to keep `actix-web` and `actori-web` compiling

This extends the existing `ident_name_compatibility_hack` to handle the
`tuple_from_req` macro defined in `actix-web` (and its fork
`actori-web`).

8 files changed, 77 insertions, 5 deletions

diff --git a/compiler/rustc_ast/src/token.rs b/compiler/rustc_ast/src/token.rs
index d5b3e87adc3..9635750fb40 100644
--- a/compiler/rustc_ast/src/token.rs
+++ b/compiler/rustc_ast/src/token.rs
@@ -810,10 +810,10 @@ impl Nonterminal {
             if let ExpnKind::Macro(_, macro_name) = orig_span.ctxt().outer_expn_data().kind {
                 let filename = source_map.span_to_filename(orig_span);
                 if let FileName::Real(RealFileName::Named(path)) = filename {
-                    let matches_prefix = |prefix| {
-                        // Check for a path that ends with 'prefix*/src/lib.rs'
+                    let matches_prefix = |prefix, filename| {
+                        // Check for a path that ends with 'prefix*/src/<filename>'
                         let mut iter = path.components().rev();
-                        iter.next().and_then(|p| p.as_os_str().to_str()) == Some("lib.rs")
+                        iter.next().and_then(|p| p.as_os_str().to_str()) == Some(filename)
                             && iter.next().and_then(|p| p.as_os_str().to_str()) == Some("src")
                             && iter
                                 .next()
@@ -821,14 +821,25 @@ impl Nonterminal {
                                 .map_or(false, |p| p.starts_with(prefix))
                     };
 
-                    if (macro_name == sym::impl_macros && matches_prefix("time-macros-impl"))
-                        || (macro_name == sym::arrays && matches_prefix("js-sys"))
+                    if (macro_name == sym::impl_macros
+                        && matches_prefix("time-macros-impl", "lib.rs"))
+                        || (macro_name == sym::arrays && matches_prefix("js-sys", "lib.rs"))
                     {
                         let snippet = source_map.span_to_snippet(orig_span);
                         if snippet.as_deref() == Ok("$name") {
                             return Some((*ident, *is_raw));
                         }
                     }
+
+                    if macro_name == sym::tuple_from_req
+                        && (matches_prefix("actix-web", "extract.rs")
+                            || matches_prefix("actori-web", "extract.rs"))
+                    {
+                        let snippet = source_map.span_to_snippet(orig_span);
+                        if snippet.as_deref() == Ok("$T") {
+                            return Some((*ident, *is_raw));
+                        }
+                    }
                 }
             }
         }
diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs
index 223a0758f00..28fef65da07 100644
--- a/compiler/rustc_span/src/symbol.rs
+++ b/compiler/rustc_span/src/symbol.rs
@@ -1114,6 +1114,7 @@ symbols! {
         try_trait,
         tt,
         tuple,
+        tuple_from_req,
         tuple_indexing,
         two_phase,
         ty,
diff --git a/src/test/ui/proc-macro/group-compat-hack/actix-web-2.0.0/src/extract.rs b/src/test/ui/proc-macro/group-compat-hack/actix-web-2.0.0/src/extract.rs
new file mode 100644
index 00000000000..2d4f6010012
--- /dev/null
+++ b/src/test/ui/proc-macro/group-compat-hack/actix-web-2.0.0/src/extract.rs
@@ -0,0 +1,7 @@
+// ignore-test this is not a test
+
+macro_rules! tuple_from_req {
+    ($T:ident) => {
+        #[my_macro] struct Three($T);
+    }
+}
diff --git a/src/test/ui/proc-macro/group-compat-hack/actix-web/src/extract.rs b/src/test/ui/proc-macro/group-compat-hack/actix-web/src/extract.rs
new file mode 100644
index 00000000000..2d4f6010012
--- /dev/null
+++ b/src/test/ui/proc-macro/group-compat-hack/actix-web/src/extract.rs
@@ -0,0 +1,7 @@
+// ignore-test this is not a test
+
+macro_rules! tuple_from_req {
+    ($T:ident) => {
+        #[my_macro] struct Three($T);
+    }
+}
diff --git a/src/test/ui/proc-macro/group-compat-hack/actori-web-2.0.0/src/extract.rs b/src/test/ui/proc-macro/group-compat-hack/actori-web-2.0.0/src/extract.rs
new file mode 100644
index 00000000000..9ec6aba63f3
--- /dev/null
+++ b/src/test/ui/proc-macro/group-compat-hack/actori-web-2.0.0/src/extract.rs
@@ -0,0 +1,7 @@
+// ignore-test this is not a test
+
+macro_rules! tuple_from_req {
+    ($T:ident) => {
+        #[my_macro] struct Four($T);
+    }
+}
diff --git a/src/test/ui/proc-macro/group-compat-hack/actori-web/src/extract.rs b/src/test/ui/proc-macro/group-compat-hack/actori-web/src/extract.rs
new file mode 100644
index 00000000000..9ec6aba63f3
--- /dev/null
+++ b/src/test/ui/proc-macro/group-compat-hack/actori-web/src/extract.rs
@@ -0,0 +1,7 @@
+// ignore-test this is not a test
+
+macro_rules! tuple_from_req {
+    ($T:ident) => {
+        #[my_macro] struct Four($T);
+    }
+}
diff --git a/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.rs b/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.rs
index bc82a2ff196..652fabf34ac 100644
--- a/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.rs
+++ b/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.rs
@@ -45,5 +45,33 @@ mod with_version {
     other!(Foo);
 }
 
+mod actix_web_test {
+    include!("actix-web/src/extract.rs");
+
+    struct Foo;
+    tuple_from_req!(Foo);
+}
+
+mod actix_web_version_test {
+    include!("actix-web-2.0.0/src/extract.rs");
+
+    struct Foo;
+    tuple_from_req!(Foo);
+}
+
+mod actori_web_test {
+    include!("actori-web/src/extract.rs");
+
+    struct Foo;
+    tuple_from_req!(Foo);
+}
+
+mod actori_web_version_test {
+    include!("actori-web-2.0.0/src/extract.rs");
+
+    struct Foo;
+    tuple_from_req!(Foo);
+}
+
 
 fn main() {}
diff --git a/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.stdout b/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.stdout
index e83bc9f8fca..c6b18ab674b 100644
--- a/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.stdout
+++ b/src/test/ui/proc-macro/group-compat-hack/group-compat-hack.stdout
@@ -4,3 +4,7 @@ Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/gro
 Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/time-macros-impl-0.1.0/src/lib.rs:5:21: 5:27 (#20) }, Ident { ident: "One", span: $DIR/time-macros-impl-0.1.0/src/lib.rs:5:28: 5:31 (#20) }, Group { delimiter: Parenthesis, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:43:18: 43:21 (#0) }], span: $DIR/time-macros-impl-0.1.0/src/lib.rs:5:31: 5:38 (#20) }, Punct { ch: ';', spacing: Alone, span: $DIR/time-macros-impl-0.1.0/src/lib.rs:5:38: 5:39 (#20) }]
 Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/js-sys-0.3.17/src/lib.rs:5:21: 5:27 (#24) }, Ident { ident: "Two", span: $DIR/js-sys-0.3.17/src/lib.rs:5:28: 5:31 (#24) }, Group { delimiter: Parenthesis, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:44:13: 44:16 (#0) }], span: $DIR/js-sys-0.3.17/src/lib.rs:5:31: 5:38 (#24) }, Punct { ch: ';', spacing: Alone, span: $DIR/js-sys-0.3.17/src/lib.rs:5:38: 5:39 (#24) }]
 Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/group-compat-hack.rs:38:25: 38:31 (#28) }, Ident { ident: "Three", span: $DIR/group-compat-hack.rs:38:32: 38:37 (#28) }, Group { delimiter: Parenthesis, stream: TokenStream [Group { delimiter: None, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:45:12: 45:15 (#0) }], span: $DIR/group-compat-hack.rs:38:38: 38:43 (#28) }], span: $DIR/group-compat-hack.rs:38:37: 38:44 (#28) }, Punct { ch: ';', spacing: Alone, span: $DIR/group-compat-hack.rs:38:44: 38:45 (#28) }]
+Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/actix-web/src/extract.rs:5:21: 5:27 (#33) }, Ident { ident: "Three", span: $DIR/actix-web/src/extract.rs:5:28: 5:33 (#33) }, Group { delimiter: Parenthesis, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:52:21: 52:24 (#0) }], span: $DIR/actix-web/src/extract.rs:5:33: 5:37 (#33) }, Punct { ch: ';', spacing: Alone, span: $DIR/actix-web/src/extract.rs:5:37: 5:38 (#33) }]
+Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/actix-web-2.0.0/src/extract.rs:5:21: 5:27 (#38) }, Ident { ident: "Three", span: $DIR/actix-web-2.0.0/src/extract.rs:5:28: 5:33 (#38) }, Group { delimiter: Parenthesis, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:59:21: 59:24 (#0) }], span: $DIR/actix-web-2.0.0/src/extract.rs:5:33: 5:37 (#38) }, Punct { ch: ';', spacing: Alone, span: $DIR/actix-web-2.0.0/src/extract.rs:5:37: 5:38 (#38) }]
+Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/actori-web/src/extract.rs:5:21: 5:27 (#43) }, Ident { ident: "Four", span: $DIR/actori-web/src/extract.rs:5:28: 5:32 (#43) }, Group { delimiter: Parenthesis, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:66:21: 66:24 (#0) }], span: $DIR/actori-web/src/extract.rs:5:32: 5:36 (#43) }, Punct { ch: ';', spacing: Alone, span: $DIR/actori-web/src/extract.rs:5:36: 5:37 (#43) }]
+Called proc_macro_hack with TokenStream [Ident { ident: "struct", span: $DIR/actori-web-2.0.0/src/extract.rs:5:21: 5:27 (#48) }, Ident { ident: "Four", span: $DIR/actori-web-2.0.0/src/extract.rs:5:28: 5:32 (#48) }, Group { delimiter: Parenthesis, stream: TokenStream [Ident { ident: "Foo", span: $DIR/group-compat-hack.rs:73:21: 73:24 (#0) }], span: $DIR/actori-web-2.0.0/src/extract.rs:5:32: 5:36 (#48) }, Punct { ch: ';', spacing: Alone, span: $DIR/actori-web-2.0.0/src/extract.rs:5:36: 5:37 (#48) }]