[PATCH] libiberty: d-demangle: write distinguishable variadics on demangled symbol

[Luís Ferreira]

Currently _D8demangle4testFYv and _D8demangle4testFXv report the same demangled
symbol and they are not the same. The official demangler reports
"demangle.test(, ...)", which is the distinguishable way to do it.

Signed-off-by: Luís Ferreira <cont...@lsferreira.net>

libiberty/ChangeLog:

        * d-demangle.c (dlang_function_args): change Y variadic to always
          report ", ...".
        * testsuite/d-demangle-expected: change test for Y variadic and add a
          missing test for X variadic.
---
 libiberty/d-demangle.c                  | 4 +---
 libiberty/testsuite/d-demangle-expected | 4 ++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/libiberty/d-demangle.c b/libiberty/d-demangle.c
index 880f2ec85a4..4ec94316dad 100644
--- a/libiberty/d-demangle.c
+++ b/libiberty/d-demangle.c
@@ -690,9 +690,7 @@ dlang_function_args (string *decl, const char *mangled, 
struct dlang_info *info)
          return mangled;
        case 'Y': /* (variadic T t, ...) style.  */
          mangled++;
-         if (n != 0)
-           string_append (decl, ", ");
-         string_append (decl, "...");
+         string_append (decl, ", ...");
          return mangled;
        case 'Z': /* Normal function.  */
          mangled++;
diff --git a/libiberty/testsuite/d-demangle-expected 
b/libiberty/testsuite/d-demangle-expected
index 44a3649c429..ec481d27dbe 100644
--- a/libiberty/testsuite/d-demangle-expected
+++ b/libiberty/testsuite/d-demangle-expected
@@ -359,6 +359,10 @@ demangle.test(char, char, ...)
 #
 --format=dlang
 _D8demangle4testFYv
+demangle.test(, ...)
+#
+--format=dlang
+_D8demangle4testFXv
 demangle.test(...)
 #
 --format=dlang
-- 
2.33.0