Preserve struct field pattern shorthand in the prettyprinter.

Use the `is_shorthand` field introduced by #17813 (ead6c4b) to make the
prettyprinter output the shorthand form. Fixes a few places that set
`is_shorthand: true` when the pattern is not a PatIdent with the same
name as the field.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/test/pretty/struct-pattern.rs b/src/test/pretty/struct-pattern.rs
new file mode 100644
index 00000000000..b0795bb08f3
--- /dev/null
+++ b/src/test/pretty/struct-pattern.rs
@@ -0,0 +1,15 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// pp-exact
+// pretty-compare-only
+// Testing that shorthand struct patterns are preserved
+
+fn main() { let Foo { a, ref b, mut c, x: y, z: z } = foo; }