Stabilize impls for dynamically sized Rc / Arc

2026-06-13 09:01:01 +00:00 · 2018-05-26 10:05:57 -07:00
parent 8a596951bf
commit 320a059e4b
2 changed files with 12 additions and 5 deletions
@@ -39,6 +39,13 @@ fn main() {
        println!("cargo:rustc-cfg=de_boxed_c_str");
    }

+    // From<Box<T>> for Rc<T> / Arc<T> stabilized in Rust 1.21:
+    // https://doc.rust-lang.org/std/rc/struct.Rc.html#impl-From<Box<T>>
+    // https://doc.rust-lang.org/std/sync/struct.Arc.html#impl-From<Box<T>>
+    if minor >= 21 {
+        println!("cargo:rustc-cfg=de_rc_dst");
+    }
+
    // 128-bit integers stabilized in Rust 1.26:
    // https://blog.rust-lang.org/2018/05/10/Rust-1.26.html
    if minor >= 26 {