[src/trunk]: src/tests/usr.bin/xlint/lint1 tests/lint: test initializing an u...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/72e6801a5e9b
branches:  trunk
changeset: 377208:72e6801a5e9b
user:      rillig <rillig%NetBSD.org@localhost>
date:      Fri Jun 30 22:27:47 2023 +0000

description:
tests/lint: test initializing an unnamed union

diffstat:

 tests/usr.bin/xlint/lint1/init_braces.c |  37 ++++++++++++++++++++++++++++++++-
 1 files changed, 36 insertions(+), 1 deletions(-)

diffs (48 lines):

diff -r e5ac7acd76b7 -r 72e6801a5e9b tests/usr.bin/xlint/lint1/init_braces.c
--- a/tests/usr.bin/xlint/lint1/init_braces.c   Fri Jun 30 22:15:14 2023 +0000
+++ b/tests/usr.bin/xlint/lint1/init_braces.c   Fri Jun 30 22:27:47 2023 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: init_braces.c,v 1.5 2023/06/30 21:06:18 rillig Exp $   */
+/*     $NetBSD: init_braces.c,v 1.6 2023/06/30 22:27:47 rillig Exp $   */
 # 3 "init_braces.c"
 
 /*
@@ -96,3 +96,38 @@ init_anonymous_struct_and_union(void)
 
        return var.times.t0.ns;
 }
+
+// Minimized example taken from jemalloc.c, init_lock.
+unsigned char
+init_unnamed_union(void)
+{
+       struct init_unnamed_union {
+               union {
+                       struct {
+                               struct padded_union {
+                                       unsigned char pad1[3];
+                                       union {
+                                               unsigned char u1;
+                                               unsigned char u2;
+                                       };
+                                       unsigned char pad2[3];
+                               } padded_union;
+                       };
+               };
+       };
+
+       struct init_unnamed_union var = {
+               {
+                       {
+                               .padded_union = {
+                                       .pad1 = { 0, 0, 0 },
+/* FIXME: Allow access to unnamed struct/union members. */
+/* expect+1: error: type 'struct padded_union' does not have member 'u1' [101] */
+                                       .u1 = 0,
+                                       .pad2 = { 0, 0, 0 },
+                               },
+                       }
+               },
+       };
+       return var.padded_union.u1;
+}