[PATCH] libiberty: Add support for 'in' and 'in ref' storage classes.

[Iain Buclaw <ibuclaw@gdcproject.org>]

Hi,

This patch adds support for 'in' as a first-class storage class with its
own mangle symbol, of which also permits 'in ref'.  Previously, 'in' was
an alias to 'const [scope]', which is a type constructor.

The mangle symbol repurposed for this is 'I', which was originally used
by identifier types.  However, while TypeIdentifier is part of the
grammar, it must be resolved to some other entity during the semantic
passes, and so shouldn't appear anywhere in the mangled name.

OK for mainline?

Regards
Iain.

---
libiberty/ChangeLog:

	* d-demangle.c (dlang_function_args): Handle 'in' and 'in ref'
	parameter storage classes.
	(dlang_type): Remove identifier type.
	* testsuite/d-demangle-expected: Update tests.
---
 libiberty/d-demangle.c                  | 10 +++++++++-
 libiberty/testsuite/d-demangle-expected | 16 ++++++++--------
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/libiberty/d-demangle.c b/libiberty/d-demangle.c
index f2d6946ecad..2e52eff7617 100644
--- a/libiberty/d-demangle.c
+++ b/libiberty/d-demangle.c
@@ -699,6 +699,15 @@ dlang_function_args (string *decl, const char *mangled, struct dlang_info *info)
 
       switch (*mangled)
 	{
+	case 'I': /* in(T) */
+	  mangled++;
+	  string_append (decl, "in ");
+	  if (*mangled == 'K') /* in ref(T) */
+	    {
+	      mangled++;
+	      string_append (decl, "ref ");
+	    }
+	  break;
 	case 'J': /* out(T) */
 	  mangled++;
 	  string_append (decl, "out ");
@@ -826,7 +835,6 @@ dlang_type (string *decl, const char *mangled, struct dlang_info *info)
       mangled = dlang_function_type (decl, mangled, info);
       string_append (decl, "function");
       return mangled;
-    case 'I': /* ident T */
     case 'C': /* class T */
     case 'S': /* struct T */
     case 'E': /* enum T */
diff --git a/libiberty/testsuite/d-demangle-expected b/libiberty/testsuite/d-demangle-expected
index e3f32e31d7b..ffb317f23d4 100644
--- a/libiberty/testsuite/d-demangle-expected
+++ b/libiberty/testsuite/d-demangle-expected
@@ -274,14 +274,6 @@ _D8demangle4testFNhG4dZv
 demangle.test(__vector(double[4]))
 #
 --format=dlang
-_D8demangle4testFI5identZv
-demangle.test(ident)
-#
---format=dlang
-_D8demangle4testFI5ident4testZv
-demangle.test(ident.test)
-#
---format=dlang
 _D8demangle4testFC5classZv
 demangle.test(class)
 #
@@ -314,6 +306,14 @@ _D8demangle4testFT7typedef4testZv
 demangle.test(typedef.test)
 #
 --format=dlang
+_D8demangle4testFIaZv
+demangle.test(in char)
+#
+--format=dlang
+_D8demangle4testFIKaZv
+demangle.test(in ref char)
+#
+--format=dlang
 _D8demangle4testFJaZv
 demangle.test(out char)
 #
-- 
2.25.1