[Ada] Add iterators over GNAT.Array_Split.Slice_Set

gcc/ada/

	* libgnat/g-arrspl.ads, libgnat/g-arrspl.adb (Create,
	First_Cursor, Advance, Has_Element): New.

2 files changed, 51 insertions, 11 deletions

diff --git a/gcc/ada/libgnat/g-arrspl.adb b/gcc/ada/libgnat/g-arrspl.adb
index e6f0d99..8770030 100644
--- a/gcc/ada/libgnat/g-arrspl.adb
+++ b/gcc/ada/libgnat/g-arrspl.adb
@@ -49,7 +49,7 @@ package body GNAT.Array_Split is
    -- Adjust --
    ------------
 
-   procedure Adjust (S : in out Slice_Set) is
+   overriding procedure Adjust (S : in out Slice_Set) is
    begin
       S.D.Ref_Counter := S.D.Ref_Counter + 1;
    end Adjust;
@@ -68,6 +68,16 @@ package body GNAT.Array_Split is
       Create (S, From, To_Set (Separators), Mode);
    end Create;
 
+   function Create
+     (From       : Element_Sequence;
+      Separators : Element_Sequence;
+      Mode       : Separator_Mode := Single) return Slice_Set is
+   begin
+      return Ret : Slice_Set do
+         Create (Ret, From, Separators, Mode);
+      end return;
+   end Create;
+
    ------------
    -- Create --
    ------------
@@ -85,6 +95,16 @@ package body GNAT.Array_Split is
       S := Result;
    end Create;
 
+   function Create
+     (From       : Element_Sequence;
+      Separators : Element_Set;
+      Mode       : Separator_Mode := Single) return Slice_Set is
+   begin
+      return Ret : Slice_Set do
+         Create (Ret, From, Separators, Mode);
+      end return;
+   end Create;
+
    -----------
    -- Count --
    -----------
@@ -108,7 +128,7 @@ package body GNAT.Array_Split is
    -- Finalize --
    --------------
 
-   procedure Finalize (S : in out Slice_Set) is
+   overriding procedure Finalize (S : in out Slice_Set) is
 
       procedure Free is
          new Ada.Unchecked_Deallocation (Element_Sequence, Element_Access);
@@ -139,7 +159,7 @@ package body GNAT.Array_Split is
    -- Initialize --
    ----------------
 
-   procedure Initialize (S : in out Slice_Set) is
+   overriding procedure Initialize (S : in out Slice_Set) is
    begin
       S.D := new Data'(1, null, 0, null, null);
    end Initialize;
diff --git a/gcc/ada/libgnat/g-arrspl.ads b/gcc/ada/libgnat/g-arrspl.ads
index 3383f40..099d499 100644
--- a/gcc/ada/libgnat/g-arrspl.ads
+++ b/gcc/ada/libgnat/g-arrspl.ads
@@ -72,7 +72,12 @@ package GNAT.Array_Split is
       --  separator and no empty slice is created.
      );
 
-   type Slice_Set is private;
+   type Slice_Set is private
+     with Iterable => (First        => First_Cursor,
+                       Next         => Advance,
+                       Has_Element  => Has_Element,
+                       Element      => Slice);
+
    --  This type uses by-reference semantics. This is a set of slices as
    --  returned by Create or Set routines below. The abstraction represents
    --  a set of items. Each item is a part of the original array named a
@@ -85,6 +90,10 @@ package GNAT.Array_Split is
       From       : Element_Sequence;
       Separators : Element_Sequence;
       Mode       : Separator_Mode := Single);
+   function Create
+     (From       : Element_Sequence;
+      Separators : Element_Sequence;
+      Mode       : Separator_Mode := Single) return Slice_Set;
    --  Create a cut array object. From is the source array, and Separators
    --  is a sequence of Element along which to split the array. The source
    --  array is sliced at separator boundaries. The separators are not
@@ -99,6 +108,10 @@ package GNAT.Array_Split is
       From       : Element_Sequence;
       Separators : Element_Set;
       Mode       : Separator_Mode := Single);
+   function Create
+     (From       : Element_Sequence;
+      Separators : Element_Set;
+      Mode       : Separator_Mode := Single) return Slice_Set;
    --  Same as above but using a Element_Set
 
    procedure Set
@@ -117,14 +130,21 @@ package GNAT.Array_Split is
    type Slice_Number is new Natural;
    --  Type used to count number of slices
 
-   function Slice_Count (S : Slice_Set) return Slice_Number;
-   pragma Inline (Slice_Count);
+   function Slice_Count (S : Slice_Set) return Slice_Number with Inline;
    --  Returns the number of slices (fields) in S
 
+   function First_Cursor (Unused : Slice_Set) return Slice_Number is (1);
+   function Advance
+     (Unused : Slice_Set; Position : Slice_Number) return Slice_Number
+   is (Position + 1);
+   function Has_Element
+     (Cont : Slice_Set; Position : Slice_Number) return Boolean
+   is (Position <= Slice_Count (Cont));
+   --  Functions used to iterate over a Slice_Set
+
    function Slice
      (S     : Slice_Set;
-      Index : Slice_Number) return Element_Sequence;
-   pragma Inline (Slice);
+      Index : Slice_Number) return Element_Sequence with Inline;
    --  Returns the slice at position Index. First slice is 1. If Index is 0
    --  the whole array is returned including the separators (this is the
    --  original source array).
@@ -184,8 +204,8 @@ private
       D : Data_Access;
    end record;
 
-   procedure Initialize (S : in out Slice_Set);
-   procedure Adjust     (S : in out Slice_Set);
-   procedure Finalize   (S : in out Slice_Set);
+   overriding procedure Initialize (S : in out Slice_Set);
+   overriding procedure Adjust     (S : in out Slice_Set);
+   overriding procedure Finalize   (S : in out Slice_Set);
 
 end GNAT.Array_Split;