Issue #379

Accept ``ffi.new("int[4]", p)`` if p is itself another cdata ``int[4]``.

1 files changed, 15 insertions, 0 deletions

diff --git a/testing/cffi0/backend_tests.py b/testing/cffi0/backend_tests.py
index 85fb0d4..b535108 100644
--- a/testing/cffi0/backend_tests.py
+++ b/testing/cffi0/backend_tests.py
@@ -1972,3 +1972,18 @@ class BackendTests:
         assert seen[1] == 101
         assert seen[2] == 202
         assert seen[3] == 303
+
+    def test_ffi_array_as_init(self):
+        ffi = FFI(backend=self.Backend())
+        p = ffi.new("int[4]", [10, 20, 30, 400])
+        q = ffi.new("int[4]", p)
+        assert list(q) == [10, 20, 30, 400]
+        py.test.raises(TypeError, ffi.new, "int[3]", p)
+        py.test.raises(TypeError, ffi.new, "int[5]", p)
+        py.test.raises(TypeError, ffi.new, "int16_t[4]", p)
+        s = ffi.new("struct {int i[4];}*", {'i': p})
+        assert list(s.i) == [10, 20, 30, 400]
+
+    def test_too_many_initializers(self):
+        ffi = FFI(backend=self.Backend())
+        py.test.raises(IndexError, ffi.new, "int[4]", [10, 20, 30, 40, 50])