From a0aa2307322cd47bbf416810ac0292925e03be87 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 19:39:49 +0200
Subject: Adding upstream version 1:7.0.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 rust/vendor/syn/src/gen_helper.rs | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 rust/vendor/syn/src/gen_helper.rs

(limited to 'rust/vendor/syn/src/gen_helper.rs')

diff --git a/rust/vendor/syn/src/gen_helper.rs b/rust/vendor/syn/src/gen_helper.rs
new file mode 100644
index 0000000..e433bac
--- /dev/null
+++ b/rust/vendor/syn/src/gen_helper.rs
@@ -0,0 +1,34 @@
+#[cfg(feature = "fold")]
+pub(crate) mod fold {
+    use crate::punctuated::{Pair, Punctuated};
+
+    pub(crate) trait FoldHelper {
+        type Item;
+        fn lift<F>(self, f: F) -> Self
+        where
+            F: FnMut(Self::Item) -> Self::Item;
+    }
+
+    impl<T> FoldHelper for Vec<T> {
+        type Item = T;
+        fn lift<F>(self, f: F) -> Self
+        where
+            F: FnMut(Self::Item) -> Self::Item,
+        {
+            self.into_iter().map(f).collect()
+        }
+    }
+
+    impl<T, U> FoldHelper for Punctuated<T, U> {
+        type Item = T;
+        fn lift<F>(self, mut f: F) -> Self
+        where
+            F: FnMut(Self::Item) -> Self::Item,
+        {
+            self.into_pairs()
+                .map(Pair::into_tuple)
+                .map(|(t, u)| Pair::new(f(t), u))
+                .collect()
+        }
+    }
+}
-- 
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