From 95b42490a89f98ef0b41b9445f71fcefab4ed4a7 Mon Sep 17 00:00:00 2001
From: Arnaud Charlet <charlet@adacore.com>
Date: Tue, 20 May 2008 14:02:20 +0000
Subject: [PATCH] gen_disp.ad[sb]: New test.

	* gnat.dg/gen_disp.ad[sb]: New test.
	* gnat.dg/specs/empty_variants.ads: Adjust.

From-SVN: r135658
---
 gcc/testsuite/ChangeLog                       |  2 +
 gcc/testsuite/gnat.dg/gen_disp.adb            | 45 +++++++++++++++++++
 gcc/testsuite/gnat.dg/gen_disp.ads            | 10 +++++
 .../gnat.dg/specs/empty_variants.ads          | 32 +++++++++++++
 4 files changed, 89 insertions(+)
 create mode 100644 gcc/testsuite/gnat.dg/gen_disp.adb
 create mode 100644 gcc/testsuite/gnat.dg/gen_disp.ads
 create mode 100644 gcc/testsuite/gnat.dg/specs/empty_variants.ads

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 22155ecab85..d26eee12f45 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -3,7 +3,9 @@
 	* gnat.dg/testint.adb: New test.
 	* gnat.dg/modular1.adb: New test.
 	* gnat.dg/test_iface_aggr.adb: New test.
+	* gnat.dg/gen_disp.ad[sb]: New test.
 	* gnat.dg/specs/tag2.ads: Adjust.
+	* gnat.dg/specs/empty_variants.ads: Adjust.
 
 2008-05-20  Richard Guenther  <rguenther@suse.de>
 
diff --git a/gcc/testsuite/gnat.dg/gen_disp.adb b/gcc/testsuite/gnat.dg/gen_disp.adb
new file mode 100644
index 00000000000..736b9cdc00f
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/gen_disp.adb
@@ -0,0 +1,45 @@
+--  { dg-do compile }
+with Ada.Containers.Ordered_Maps;
+with Ada.Tags.Generic_Dispatching_Constructor;
+package body gen_disp is
+   
+   use type Ada.Tags.Tag;
+   
+   function "<" (L, R : in Ada.Tags.Tag) return Boolean is
+   begin
+      return Ada.Tags.External_Tag (L) < Ada.Tags.External_Tag (R);
+   end "<";
+   
+   package Char_To_Tag_Map is new Ada.Containers.Ordered_Maps (
+      Key_Type => Character,
+      Element_Type => Ada.Tags.Tag,
+      "<" => "<",
+      "=" => Ada.Tags. "=");
+      
+   package Tag_To_Char_Map is new Ada.Containers.Ordered_Maps (
+      Key_Type => Ada.Tags.Tag,
+      Element_Type => Character,
+      "<" => "<",
+      "=" => "=");
+      
+   use type Char_To_Tag_Map.Cursor;
+   use type Tag_To_Char_Map.Cursor;
+   
+   Char_To_Tag : Char_To_Tag_Map.Map;
+   Tag_To_Char : Tag_To_Char_Map.Map;
+   
+   function Get_Object is new
+     Ada.Tags.Generic_Dispatching_Constructor
+        (Root_Type, Ada.Streams.Root_Stream_Type'Class, Root_Type'Input);
+        
+   function Root_Type_Class_Input
+     (S    : not null access Ada.Streams.Root_Stream_Type'Class)
+      return Root_Type'Class 
+   is 
+      External_Tag : constant Character := Character'Input (S);
+      C : constant Char_To_Tag_Map.Cursor := Char_To_Tag.Find (External_Tag);
+   begin
+
+      return Get_Object (Char_To_Tag_Map.Element (C), S);
+   end Root_Type_Class_Input;
+end gen_disp;
diff --git a/gcc/testsuite/gnat.dg/gen_disp.ads b/gcc/testsuite/gnat.dg/gen_disp.ads
new file mode 100644
index 00000000000..722c0c1b1a1
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/gen_disp.ads
@@ -0,0 +1,10 @@
+with Ada.Streams, Ada.Tags;
+package gen_disp is
+   type Root_Type is tagged null record;
+   
+   function Root_Type_Class_Input
+     (S    : not null access Ada.Streams.Root_Stream_Type'Class)
+      return Root_Type'Class;
+      
+   for Root_Type'Class'Input use Root_Type_Class_Input;
+end gen_disp;
diff --git a/gcc/testsuite/gnat.dg/specs/empty_variants.ads b/gcc/testsuite/gnat.dg/specs/empty_variants.ads
new file mode 100644
index 00000000000..079b64ac812
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/specs/empty_variants.ads
@@ -0,0 +1,32 @@
+--  { dg-do compile }
+--  { dg-options "-gnatdF" }
+
+package Empty_Variants is
+   
+   type Rec (D : Integer := 1) is record
+      case D is
+         when 1 =>
+            I : Integer;
+         when 2 .. 5 =>
+            J : Integer;
+            K : Integer;
+         when 6 =>
+            null;
+         when 7 .. 8 =>
+            null;
+         when others =>
+            L : Integer;
+            M : Integer;
+            N : Integer;
+      end case;
+   end record;
+   
+   R : Rec;
+   
+   I : Integer := R.I;
+   J : Integer := R.J;
+   K : Integer := R.K;
+   L : Integer := R.L;
+   M : Integer := R.L;
+
+end Empty_Variants;
-- 
2.30.2