stdlib: Introduce an ivec module into the standard library; add a minimal test case

2 files changed, 11 insertions, 0 deletions

diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 2437a5c364d..892cdc0cb0b 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -606,6 +606,16 @@ ivec_reserve(rust_task *task, type_desc *ty, rust_ivec *v, size_t n_elems)
     v->alloc = new_alloc;
 }
 
+/**
+ * Returns true if the given vector is on the heap and false if it's on the
+ * stack.
+ */
+extern "C" bool
+ivec_on_heap(rust_task *task, type_desc *ty, rust_ivec *v)
+{
+    return !v->fill && v->payload.ptr;
+}
+
 
 //
 // Local Variables:
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index ef0d5878ad8..13ab62fb29d 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -9,6 +9,7 @@ debug_trap
 debug_tydesc
 do_gc
 get_time
+ivec_on_heap
 ivec_reserve
 last_os_error
 rand_free