[COMMITTED 060/145] gccrs: Add new test for box syntax

[arthur . cohen]

From: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>

Add a new test to prevent regressions on the box syntax as well as its
feature gate.

gcc/testsuite/ChangeLog:

        * rust/compile/box_syntax.rs: New test.
        * rust/compile/box_syntax_feature_gate.rs: New test.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>
---
 gcc/testsuite/rust/compile/box_syntax.rs              | 6 ++++++
 gcc/testsuite/rust/compile/box_syntax_feature_gate.rs | 5 +++++
 2 files changed, 11 insertions(+)
 create mode 100644 gcc/testsuite/rust/compile/box_syntax.rs
 create mode 100644 gcc/testsuite/rust/compile/box_syntax_feature_gate.rs

diff --git a/gcc/testsuite/rust/compile/box_syntax.rs 
b/gcc/testsuite/rust/compile/box_syntax.rs
new file mode 100644
index 00000000000..c63284b5163
--- /dev/null
+++ b/gcc/testsuite/rust/compile/box_syntax.rs
@@ -0,0 +1,6 @@
+// { dg-options "-fsyntax-only" }
+#![feature(box_syntax)]
+
+fn main() {
+    let x: Box<_> = box 1;
+}
diff --git a/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs 
b/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs
new file mode 100644
index 00000000000..8eb5503dde6
--- /dev/null
+++ b/gcc/testsuite/rust/compile/box_syntax_feature_gate.rs
@@ -0,0 +1,5 @@
+// { dg-options "-frust-compile-until=lowering" }
+
+fn main() {
+    let x: Box<_> = box 1; //{ dg-error "box expression syntax is 
experimental." "" { target *-*-* }  }
+}
-- 
2.45.2