1 files changed, 32 insertions, 0 deletions
diff --git a/third_party/rust/minimal-lexical/tests/stackvec.rs b/third_party/rust/minimal-lexical/tests/stackvec.rs
new file mode 100644
index 0000000000..d5587f23f8
--- /dev/null
+++ b/third_party/rust/minimal-lexical/tests/stackvec.rs
@@ -0,0 +1,32 @@
+use minimal_lexical::bigint;
+#[cfg(feature = "alloc")]
+pub use minimal_lexical::heapvec::HeapVec as VecType;
+#[cfg(not(feature = "alloc"))]
+pub use minimal_lexical::stackvec::StackVec as VecType;
+
+pub fn vec_from_u32(x: &[u32]) -> VecType {
+    let mut vec = VecType::new();
+    #[cfg(not(all(target_pointer_width = "64", not(target_arch = "sparc"))))]
+    {
+        for &xi in x {
+            vec.try_push(xi as bigint::Limb).unwrap();
+        }
+    }
+
+    #[cfg(all(target_pointer_width = "64", not(target_arch = "sparc")))]
+    {
+        for xi in x.chunks(2) {
+            match xi.len() {
+                1 => vec.try_push(xi[0] as bigint::Limb).unwrap(),
+                2 => {
+                    let xi0 = xi[0] as bigint::Limb;
+                    let xi1 = xi[1] as bigint::Limb;
+                    vec.try_push((xi1 << 32) | xi0).unwrap()
+                },
+                _ => unreachable!(),
+            }
+        }
+    }
+
+    vec
+}