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package body Rat_Tests.Lexers is


    function Join_Check
        return Test_Result
    is
        One    : Slexy.Combinator_Result :=
            Slebug.Create_Result (1, Packrat.Success);
        Two    : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Three  : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);

        Four   : Slexy.Combinator_Result :=
            Slebug.Create_Result (4, Packrat.Failure);
        Five   : Slexy.Combinator_Result :=
            Slebug.Create_Result (4, Packrat.Failure);

        Six    : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Needs_More);
        Seven  : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Needs_More);

        Eight  : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Failure);

        Nine   : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Optional_More);
        Ten    : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
        Eleven : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
    begin
        if  Slebug.Join (One, Two) /= Three or Slebug.Join (One, Four) /= Five or
            Slebug.Join (One, Six) /= Seven or Slebug.Join (Four, Six) /= Four or
            Slebug.Join (Five, Two) /= Five or Slebug.Join (Six, Three) /= Eight or
            Slebug.Join (Slebug.Empty_Fail, One) /= Slebug.Empty_Fail or
            Slebug.Join (Nine, Ten) /= Eleven
        then
            return Fail;
        end if;
        return Pass;
    end Join_Check;


    function Equals_Check
        return Test_Result
    is
        One : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Two : Slexy.Combinator_Result :=
            Slebug.Create_Result (0, Packrat.Failure);
    begin
        if One = Two or Two /= Slebug.Empty_Fail then
            return Fail;
        end if;
        return Pass;
    end Equals_Check;





    function Sequence_Check
        return Test_Result
    is
        function Match_A is new Slexy.Match ('a');
        function Match_B is new Slexy.Match ('b');
        function Match_C is new Slexy.Match ('c');
        function Seq_Abc is new Slexy.Sequence
          ((Match_A'Unrestricted_Access,
            Match_B'Unrestricted_Access,
            Match_C'Unrestricted_Access));

        Test_Str : String := "aababcabcab";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (1, Packrat.Failure);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (11, Packrat.Needs_More);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (6, Packrat.Success);
        Result4 : Slexy.Combinator_Result := Slebug.Empty_Fail;
        Result5 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Failure);
    begin
        if  Seq_Abc (Test_Str, 1) /= Result1 or Seq_Abc (Test_Str, 2) /= Result5 or
            Seq_Abc (Test_Str, 4) /= Result3 or Seq_Abc (Test_Str, 10) /= Result2 or
            Seq_Abc (Test_Str, 3) /= Result4 or
            Seq_Abc (Test_Str, Test_Str'Last + 5) /= Result4
        then
            return Fail;
        end if;
        return Pass;
    end Sequence_Check;


    function Count_Check
        return Test_Result
    is
        function Match_A is new Slexy.Match ('a');
        function Match_B is new Slexy.Match ('b');
        function Count_2A is new Slexy.Count (Match_A, 2);
        function Count_3B is new Slexy.Count (Match_B, 3);

        Test_Str : String := "abaabbaaabbbaaaabbbb";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (1, Packrat.Failure);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (4, Packrat.Success);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (2, Packrat.Failure);
        Result4 : Slexy.Combinator_Result :=
            Slebug.Create_Result (20, Packrat.Needs_More);
        Result5 : Slexy.Combinator_Result :=
            Slebug.Create_Result (12, Packrat.Success);
        Result6 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Count_2A (Test_Str, 1) /= Result1 or Count_2A (Test_Str, 3) /= Result2 or
            Count_3B (Test_Str, 2) /= Result3 or Count_3B (Test_Str, 19) /= Result4 or
            Count_3B (Test_Str, 10) /= Result5 or Count_3B (Test_Str, 1) /= Result6 or
            Count_2A (Test_Str, 2) /= Result6 or
            Count_2A (Test_Str, Test_Str'Last + 5) /= Result6
        then
            return Fail;
        end if;
        return Pass;
    end Count_Check;


    function Many_Check
        return Test_Result
    is
        function Match_A is new Slexy.Match ('a');
        function Many_0 is new Slexy.Many (Match_A);
        function Many_4 is new Slexy.Many (Match_A, 4);

        function Match_B is new Slexy.Match ('b');
        function Match_C is new Slexy.Match ('c');
        function Seq_Abc is new Slexy.Sequence
          ((Match_A'Unrestricted_Access,
            Match_B'Unrestricted_Access,
            Match_C'Unrestricted_Access));
        function Many_Seq_0 is new Slexy.Many (Seq_Abc);
        function Many_Seq_4 is new Slexy.Many (Seq_Abc, 4);

        Test_Str  : String := "aaabbaaaaabaa";
        Test_Str2 : String := "aababcabcab";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (13, Packrat.Optional_More);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (10, Packrat.Success);
        Result4 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Failure);
        Result5 : Slexy.Combinator_Result := Slebug.Empty_Fail;
        Result6 : Slexy.Combinator_Result :=
            Slebug.Create_Result (13, Packrat.Needs_More);
        Result7 : Slexy.Combinator_Result :=
            Slebug.Create_Result (0, Packrat.Success);
        Result8 : Slexy.Combinator_Result :=
            Slebug.Create_Result (9, Packrat.Optional_More);
        Result9 : Slexy.Combinator_Result :=
            Slebug.Create_Result (9, Packrat.Needs_More);
    begin
        if  Many_0 (Test_Str, 1) /= Result1 or Many_4 (Test_Str, 1) /= Result4 or
            Many_4 (Test_Str, 6) /= Result3 or Many_0 (Test_Str, 4) /= Result7 or
            Many_0 (Test_Str, 12) /= Result2 or Many_4 (Test_Str, 12) /= Result6 or
            Many_0 (Test_Str, Test_Str'Last + 5) /= Result5 or
            Many_Seq_0 (Test_Str2, 4) /= Result8 or Many_Seq_4 (Test_Str2, 4) /= Result9
        then
            return Fail;
        end if;
        return Pass;
    end Many_Check;


    function Many_Until_Check
        return Test_Result
    is
        function Match_A is new Slexy.Match ('a');
        function Many_Until_0 is new Slexy.Many_Until (Match_A, PU.Is_Digit);
        function Many_Until_3 is new Slexy.Many_Until (Match_A, PU.Is_Digit, 3);

        Test_Str : String := "aaaabbaaa123aaa";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (4, Packrat.Failure);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (9, Packrat.Success);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (15, Packrat.Needs_More);
        Result4 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Many_Until_0 (Test_Str, 1) /= Result1 or
            Many_Until_0 (Test_Str, 7) /= Result2 or
            Many_Until_3 (Test_Str, 7) /= Result2 or
            Many_Until_3 (Test_Str, 13) /= Result3 or
            Many_Until_0 (Test_Str, 5) /= Result4 or
            Many_Until_0 (Test_Str, Test_Str'Last + 5) /= Result4 or
            Many_Until_3 (Test_Str, Test_Str'Last + 5) /= Result4
        then
            return Fail;
        end if;
        return Pass;
    end Many_Until_Check;


    function Satisfy_Check
        return Test_Result
    is
        function Is_123
               (Char : in Character)
            return Boolean is
        begin
            return Char = '1' or Char = '2' or Char = '3';
        end Is_123;
        function Is_Abc
               (Char : in Character)
            return Boolean is
        begin
            return Char = 'a' or Char = 'b' or Char = 'c';
        end Is_Abc;

        function Satisfy_123 is new Slexy.Satisfy (Is_123);
        function Satisfy_Abc is new Slexy.Satisfy (Is_Abc);

        Test_Str : String := "abc123456def";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (2, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (6, Packrat.Success);
        Result3 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Satisfy_123 (Test_Str, 6) /= Result2 or
            Satisfy_Abc (Test_Str, 2) /= Result1 or
            Satisfy_Abc (Test_Str, 8) /= Result3 or
            Satisfy_123 (Test_Str, Test_Str'Last + 5) /= Result3
        then
            return Fail;
        end if;
        return Pass;
    end Satisfy_Check;


    function Satisfy_With_Check
        return Test_Result
    is
        function Is_Abc
               (Char : in Character)
            return Boolean is
        begin
            return Char = 'a' or Char = 'b' or Char = 'c';
        end Is_Abc;
        function Is_123
               (Char : in Character)
            return Boolean is
        begin
            return Char = '1' or Char = '2' or Char = '3';
        end Is_123;
        function Minus_One
               (Char : in Character)
            return Character is
        begin
            return Character'Val (Character'Pos (Char) - 1);
        end Minus_One;

        function Satisfy_Bcd is new Slexy.Satisfy_With (Is_Abc, Minus_One);
        function Satisfy_234 is new Slexy.Satisfy_With (Is_123, Minus_One);

        Test_Str : String := "abcde12345";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (7, Packrat.Success);
        Result3 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Satisfy_Bcd (Test_Str, 3) /= Result1 or
            Satisfy_234 (Test_Str, 7) /= Result2 or
            Satisfy_Bcd (Test_Str, 1) /= Result3 or
            Satisfy_234 (Test_Str, Test_Str'Last + 5) /= Result3
        then
            return Fail;
        end if;
        return Pass;
    end Satisfy_With_Check;


    function Match_Check
        return Test_Result
    is
        function Match_A is new Slexy.Match ('a');
        function Match_Slash is new Slexy.Match ('/');
        function Match_4 is new Slexy.Match ('4');

        Test_Str : String := "abc1234./5";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (1, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (9, Packrat.Success);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (7, Packrat.Success);
        Result4 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Match_A (Test_Str, 1) /= Result1 or
            Match_Slash (Test_Str, 9) /= Result2 or
            Match_4 (Test_Str, 7) /= Result3 or
            Match_A (Test_Str, 3) /= Result4 or
            Match_A (Test_Str, Test_Str'Last + 5) /= Result4
        then
            return Fail;
        end if;
        return Pass;
    end Match_Check;


    function Match_With_Check
        return Test_Result
    is
        function Plus_One
               (Char : in Character)
            return Character is
        begin
            return Character'Val (Character'Pos (Char) + 1);
        end Plus_One;

        function Match_A is new Slexy.Match_With ('b', Plus_One);
        function Match_6 is new Slexy.Match_With ('7', Plus_One);

        Test_Str : String := "abc5678";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (1, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
        Result3 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Match_A (Test_Str, 1) /= Result1 or
            Match_6 (Test_Str, 5) /= Result2 or
            Match_A (Test_Str, 2) /= Result3 or
            Match_A (Test_Str, Test_Str'Last + 5) /= Result3
        then
            return Fail;
        end if;
        return Pass;
    end Match_With_Check;


    function Multimatch_Check
        return Test_Result
    is
        function Match_String1 is new Slexy.Multimatch ("abc");
        function Match_String2 is new Slexy.Multimatch ("hello");

        Test_Str : String := "abcdefabhelloworldab";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (20, Packrat.Needs_More);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (13, Packrat.Success);
        Result4 : Slexy.Combinator_Result :=
            Slebug.Create_Result (8, Packrat.Failure);
        Result5 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Match_String1 (Test_Str, 1) /= Result1 or
            Match_String1 (Test_Str, 7) /= Result4 or
            Match_String2 (Test_Str, 9) /= Result3 or
            Match_String2 (Test_Str, 3) /= Result5 or
            Match_String1 (Test_Str, 19) /= Result2 or
            Match_String1 (Test_Str, Test_Str'Last + 5) /= Result5
        then
            return Fail;
        end if;
        return Pass;
    end Multimatch_Check;


    function Take_Check
        return Test_Result
    is
        function Take_1 is new Slexy.Take;
        function Take_5 is new Slexy.Take (5);

        Test_Str : String := "abcdefghi";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (2, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (9, Packrat.Needs_More);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (7, Packrat.Success);
        Result4 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Take_1 (Test_Str, 2) /= Result1 or Take_5 (Test_Str, 7) /= Result2 or
            Take_5 (Test_Str, 3) /= Result3 or
            Take_1 (Test_Str, Test_Str'Last + 5) /= Result4
        then
            return Fail;
        end if;
        return Pass;
    end Take_Check;


    function Take_While_Check
        return Test_Result
    is
        function Take_Letters is new Slexy.Take_While (PU.Is_Letter);
        function Take_Punch is new Slexy.Take_While (PU.Is_Punctuation);
        function Take_Digits is new Slexy.Take_While (PU.Is_Digit);

        Test_Str : String := "abcde,./;'fghi[]=-^563";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (14, Packrat.Success);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (10, Packrat.Success);
        Result4 : Slexy.Combinator_Result :=
            Slebug.Create_Result (19, Packrat.Success);
        Result5 : Slexy.Combinator_Result := Slebug.Empty_Fail;
        Result6 : Slexy.Combinator_Result :=
            Slebug.Create_Result (22, Packrat.Optional_More);
    begin
        if  Take_Letters (Test_Str, 2) /= Result1 or
            Take_Letters (Test_Str, 13) /= Result2 or
            Take_Punch (Test_Str, 6) /= Result3 or
            Take_Punch (Test_Str, 17) /= Result4 or
            Take_Letters (Test_Str, 7) /= Result5 or
            Take_Punch (Test_Str, Test_Str'Last + 5) /= Result5 or
            Take_Digits (Test_Str, 20) /= Result6
        then
            return Fail;
        end if;
        return Pass;
    end Take_While_Check;


    function Take_Until_Check
        return Test_Result
    is
        function Take_Till_Punch is new Slexy.Take_Until (PU.Is_Punctuation);
        function Take_Till_Digit is new Slexy.Take_Until (PU.Is_Digit);

        Test_Str : String := "abcde12345;;;fghi67";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (10, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (19, Packrat.Optional_More);
        Result3 : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
        Result4 : Slexy.Combinator_Result :=
            Slebug.Create_Result (17, Packrat.Success);
        Result5 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  Take_Till_Punch (Test_Str, 4) /= Result1 or
            Take_Till_Punch (Test_Str, 16) /= Result2 or
            Take_Till_Digit (Test_Str, 1) /= Result3 or
            Take_Till_Digit (Test_Str, 12) /= Result4 or
            Take_Till_Punch (Test_Str, 11) /= Result5 or
            Take_Till_Punch (Test_Str, Test_Str'Last + 5) /= Result5
        then
            return Fail;
        end if;
        return Pass;
    end Take_Until_Check;


    function Line_End_Check
        return Test_Result
    is
        function LF_End is new Slexy.Line_End (Latin.LF);
        function C_End is new Slexy.Line_End ('c');

        Test_Str : String := "abcd" & Latin.LF & "e";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Result3 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  LF_End (Test_Str, 5) /= Result1 or C_End (Test_Str, 3) /= Result2 or
            LF_End (Test_Str, Test_Str'Last + 5) /= Result3 or LF_End (Test_Str, 1) /= Result3
        then
            return Fail;
        end if;
        return Pass;
    end Line_End_Check;


    function Input_End_Check
        return Test_Result
    is
        function C_End is new Slexy.Input_End ('c');
        function E_End is new Slexy.Input_End ('e');

        Test_Str : String := "abcde";

        Result1 : Slexy.Combinator_Result :=
            Slebug.Create_Result (5, Packrat.Success);
        Result2 : Slexy.Combinator_Result :=
            Slebug.Create_Result (3, Packrat.Success);
        Result3 : Slexy.Combinator_Result := Slebug.Empty_Fail;
    begin
        if  C_End (Test_Str, 3) /= Result2 or E_End (Test_Str, 5) /= Result1 or
            C_End (Test_Str, 6) /= Result3 or E_End (Test_Str, 6) /= Result3 or
            C_End (Test_Str, 1) /= Result3 or E_End (Test_Str, Test_Str'Last + 5) /= Result3
        then
            return Fail;
        end if;
        return Pass;
    end Input_End_Check;





    function Stamp_Check
        return Test_Result
    is
        use type Slexy_Traits.Tokens.Token_Type;
        use type Packrat.Result_Status;
        use type Slexy.Component_Result;

        function Match_A is new Slexy.Match ('a');
        function Match_B is new Slexy.Match ('b');
        function Match_C is new Slexy.Match ('c');
        function Seq_Abc is new Slexy.Sequence
          ((Match_A'Unrestricted_Access,
            Match_B'Unrestricted_Access,
            Match_C'Unrestricted_Access));
        function My_Stamp is new Slexy.Stamp (One, Seq_Abc);

        Test_Str1 : String := "abcdefghi";
        Test_Str2 : String := "ab";

        Context1 : Slexy.Lexer_Context := Slebug.Empty_Context;
        Context2 : Slexy.Lexer_Context := Slebug.Empty_Context;

        Comp_Code : Slexy.Component_Result;
    begin
        Comp_Code := My_Stamp (Test_Str1, Context1);
        if (Slebug.So_Far (Context1).Length /= 1 or else
            Slebug.So_Far (Context1).Element (1) /= Slexy_Traits.Tokens.Create (One, 1, "abc")) or
            Slebug.Position (Context1) /= 4 or Slebug.Status (Context1) /= Packrat.Success or
            Slebug.Has_Pass (Context1)
        then
            return Fail;
        end if;
        Comp_Code := My_Stamp (Test_Str1, Context1);
        if (Slebug.So_Far (Context1).Length /= 1 or else
            Slebug.So_Far (Context1).Element (1) /= Slexy_Traits.Tokens.Create (One, 1, "abc")) or
            Slebug.Position (Context1) /= 4 or not Slebug.Is_Failure (Comp_Code) or
            Slebug.Has_Pass (Context1)
        then
            return Fail;
        end if;
        Comp_Code := My_Stamp (Test_Str2, Context2);
        if  Slebug.So_Far (Context2).Length /= 0 or
            Slebug.Position (Context2) /= 1 or
            Slebug.Status (Context2) /= Packrat.Needs_More or
           (not Slebug.Has_Pass (Context2) or else Slebug.Pass (Context2) /= "ab")
        then
            return Fail;
        end if;
        return Pass;
    end Stamp_Check;


    function Ignore_Check
        return Test_Result
    is
        use type Packrat.Result_Status;

        function Match_Abc is new Slexy.Multimatch ("abc");
        function My_Ignore is new Slexy.Ignore (Two, Match_Abc);

        Test_Str1 : String := "abcdefghi";
        Test_Str2 : String := "ab";

        Context1 : Slexy.Lexer_Context := Slebug.Empty_Context;
        Context2 : Slexy.Lexer_Context := Slebug.Empty_Context;

        Comp_Code : Slexy.Component_Result;
    begin
        Comp_Code := My_Ignore (Test_Str1, Context1);
        if  Slebug.So_Far (Context1).Length /= 0 or
            Slebug.Position (Context1) /= 4 or Slebug.Status (Context1) /= Packrat.Success or
            Slebug.Has_Pass (Context1)
        then
            return Fail;
        end if;
        Comp_Code := My_Ignore (Test_Str1, Context1);
        if  Slebug.So_Far (Context1).Length /= 0 or
            Slebug.Position (Context1) /= 4 or not Slebug.Is_Failure (Comp_Code) or
            Slebug.Has_Pass (Context1)
        then
            return Fail;
        end if;
        Comp_Code := My_Ignore (Test_Str2, Context2);
        if  Slebug.So_Far (Context2).Length /= 0 or
            Slebug.Position (Context2) /= 1 or Slebug.Status (Context2) /= Packrat.Needs_More or
           (not Slebug.Has_Pass (Context2) or else Slebug.Pass (Context2) /= "ab")
        then
            return Fail;
        end if;
        return Pass;
    end Ignore_Check;





    function Scan_Parts_Check
        return Test_Result
    is
        package My_Scanner is new Swordy.Scan_Parts
            ((Stamp_Word'Access, Ignore_Whitespace'Access));

        Test_Str : String := "one fine day";

        Intended_Result1 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 1, "one"),
            2 => Swordy_Traits.Tokens.Create (Word, 5, "fine"));
        Intended_Result2 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 10, "day"));

        Actual_Result1 : Swordy_Traits.Tokens.Token_Array :=
            My_Scanner.Scan (Test_Str);
        Actual_Result2 : Swordy_Traits.Tokens.Token_Array :=
            My_Scanner.Scan ("");
    begin
        if Actual_Result1 /= Intended_Result1 or Actual_Result2 /= Intended_Result2 then
            return Fail;
        end if;
        return Pass;
    end Scan_Parts_Check;


    function Scan_Once_Check
        return Test_Result
    is
        package My_Scanner is new Swordy.Scan_Once
            ((Stamp_Word'Access, Ignore_Whitespace'Access));

        Test_Str : String := "one fine day";

        Intended_Result : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 1, "one"),
            2 => Swordy_Traits.Tokens.Create (Word, 5, "fine"),
            3 => Swordy_Traits.Tokens.Create (Word, 10, "day"));

        Actual_Result : Swordy_Traits.Tokens.Token_Array :=
            My_Scanner.Scan (Test_Str);
    begin
        if Actual_Result /= Intended_Result then
            return Fail;
        end if;
        return Pass;
    end Scan_Once_Check;


    function Scan_With_Check
        return Test_Result
    is
        Sentinel : Natural := 2;
        function More_Input
            return String is
        begin
            if Sentinel > 1 then
                Sentinel := 1;
                return "it will happen  again";
            elsif Sentinel > 0 then
                Sentinel := 0;
                return " and again and again";
            else
                return "";
            end if;
        end More_Input;

        package My_Scanner is new Swordy.Scan_With
            ((Stamp_Word'Access, Ignore_Whitespace'Access));

        Intended_Result : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 1, "it"),
            2 => Swordy_Traits.Tokens.Create (Word, 4, "will"),
            3 => Swordy_Traits.Tokens.Create (Word, 9, "happen"),
            4 => Swordy_Traits.Tokens.Create (Word, 17, "again"),
            5 => Swordy_Traits.Tokens.Create (Word, 23, "and"),
            6 => Swordy_Traits.Tokens.Create (Word, 27, "again"),
            7 => Swordy_Traits.Tokens.Create (Word, 33, "and"),
            8 => Swordy_Traits.Tokens.Create (Word, 37, "again"));

        Actual_Result : Swordy_Traits.Tokens.Token_Array :=
            My_Scanner.Scan (More_Input'Unrestricted_Access);
    begin
        if Actual_Result /= Intended_Result then
            return Fail;
        end if;
        return Pass;
    end Scan_With_Check;


    function Scan_Set_Check
        return Test_Result
    is
        package My_Scanner is new Swordy.Scan_Set
           ((Stamp_Word'Access, Ignore_Whitespace'Access),
            Latin.EOT, Swordy_Traits.Tokens.Create (Blank, 1, ""));

        Test_Str1 : String (1 .. 10) := "one     tw";
        Test_Str2 : String (1 .. 10) := "o    three";
        Test_Str3 : String (1 .. 10) := Latin.EOT & "         ";

        Intended_Result1 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 1, "one"),
            2 => Swordy_Traits.Tokens.Create (Blank, 1, ""),
            3 => Swordy_Traits.Tokens.Create (Blank, 1, ""));
        Intended_Result2 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 9, "two"),
            2 => Swordy_Traits.Tokens.Create (Blank, 1, ""),
            3 => Swordy_Traits.Tokens.Create (Blank, 1, ""));
        Intended_Result3 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 16, "three"),
            2 => Swordy_Traits.Tokens.Create (Blank, 1, ""),
            3 => Swordy_Traits.Tokens.Create (Blank, 1, ""));

        Actual_Result : Swordy_Traits.Tokens.Token_Array (1 .. 3);
    begin
        My_Scanner.Scan (Test_Str1, Actual_Result);
        if Actual_Result /= Intended_Result1 then
            return Fail;
        end if;
        My_Scanner.Scan (Test_Str2, Actual_Result);
        if Actual_Result /= Intended_Result2 then
            return Fail;
        end if;
        My_Scanner.Scan (Test_Str3, Actual_Result);
        if Actual_Result /= Intended_Result3 then
            return Fail;
        end if;
        return Pass;
    end Scan_Set_Check;


    function Scan_Set_With_Check
        return Test_Result
    is
        Sentinel : Natural := 2;
        function More_Input
            return String is
        begin
            if Sentinel > 1 then
                Sentinel := 1;
                return "it will happen again";
            elsif Sentinel > 0 then
                Sentinel := 0;
                return " and again and again";
            else
                return "";
            end if;
        end More_Input;

        package My_Scanner is new Swordy.Scan_Set_With
           ((Stamp_Word'Access, Ignore_Whitespace'Access),
            Latin.EOT, Swordy_Traits.Tokens.Create (Blank, 1, ""));

        Intended_Result1 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 1, "it"),
            2 => Swordy_Traits.Tokens.Create (Word, 4, "will"),
            3 => Swordy_Traits.Tokens.Create (Word, 9, "happen"),
            4 => Swordy_Traits.Tokens.Create (Word, 16, "again"),
            5 => Swordy_Traits.Tokens.Create (Word, 22, "and"));
        Intended_Result2 : Swordy_Traits.Tokens.Token_Array :=
           (1 => Swordy_Traits.Tokens.Create (Word, 26, "again"),
            2 => Swordy_Traits.Tokens.Create (Word, 32, "and"),
            3 => Swordy_Traits.Tokens.Create (Word, 36, "again"),
            4 => Swordy_Traits.Tokens.Create (Blank, 1, ""),
            5 => Swordy_Traits.Tokens.Create (Blank, 1, ""));

        Actual_Result : Swordy_Traits.Tokens.Token_Array (1 .. 5);
    begin
        My_Scanner.Scan (More_Input'Unrestricted_Access, Actual_Result);
        if Actual_Result /= Intended_Result1 then
            return Fail;
        end if;
        My_Scanner.Scan (More_Input'Unrestricted_Access, Actual_Result);
        if Actual_Result /= Intended_Result2 then
            return Fail;
        end if;
        return Pass;
    end Scan_Set_With_Check;


    function Scan_Parts_Error_Check
        return Test_Result
    is
        use type Packrat.Errors.Error_Info_Array;

        package My_Scanner is new Swordy.Scan_Parts
            ((Stamp_Word'Access, Ignore_Whitespace'Access));

        Test_Str : String := "()()";

        Expected_Errors : Packrat.Errors.Error_Info_Array :=
            ((+"WORD", 1), (+"WHITESPACE", 1));
    begin
        declare
            Result : Swordy_Traits.Tokens.Token_Array := My_Scanner.Scan (Test_Str);
        begin
            return Fail;
        end;
    exception
        when Msg : Packrat.Lexer_Error =>
            if Packrat.Errors.Decode (Except.Exception_Message (Msg)) /= Expected_Errors then
                return Fail;
            end if;
            return Pass;
    end Scan_Parts_Error_Check;


    function Scan_Once_Error_Check
        return Test_Result
    is
        use type Packrat.Errors.Error_Info_Array;

        package My_Scanner is new Swordy.Scan_Once
            ((Stamp_Word'Access, Ignore_Whitespace'Access));

        Test_Str : String := "()()";

        Expected_Errors : Packrat.Errors.Error_Info_Array :=
            ((+"WORD", 1), (+"WHITESPACE", 1));
    begin
        declare
            Result : Swordy_Traits.Tokens.Token_Array := My_Scanner.Scan (Test_Str);
        begin
            return Fail;
        end;
    exception
        when Msg : Packrat.Lexer_Error =>
            if Packrat.Errors.Decode (Except.Exception_Message (Msg)) /= Expected_Errors then
                return Fail;
            end if;
            return Pass;
    end Scan_Once_Error_Check;


    function Scan_With_Error_Check
        return Test_Result
    is
        use type Packrat.Errors.Error_Info_Array;

        Sentinel : Integer := 1;
        function Get_Input
            return String is
        begin
            if Sentinel > 0 then
                Sentinel := 0;
                return "()()";
            else
                return "";
            end if;
        end Get_Input;

        package My_Scanner is new Swordy.Scan_With
            ((Stamp_Word'Access, Ignore_Whitespace'Access));

        Expected_Errors : Packrat.Errors.Error_Info_Array :=
            ((+"WORD", 1), (+"WHITESPACE", 1));
    begin
        declare
            Result : Swordy_Traits.Tokens.Token_Array :=
                My_Scanner.Scan (Get_Input'Unrestricted_Access);
        begin
            return Fail;
        end;
    exception
        when Msg : Packrat.Lexer_Error =>
            if Packrat.Errors.Decode (Except.Exception_Message (Msg)) /= Expected_Errors then
                return Fail;
            end if;
            return Pass;
    end Scan_With_Error_Check;


    function Scan_Set_Error_Check
        return Test_Result
    is
        use type Packrat.Errors.Error_Info_Array;

        package My_Scanner is new Swordy.Scan_Set
           ((Stamp_Word'Access, Ignore_Whitespace'Access),
            Latin.EOT, Swordy_Traits.Tokens.Create (Blank, 1, ""));

        Test_Str : String := "()()";

        Result : Swordy_Traits.Tokens.Token_Array (1 .. 5);

        Expected_Errors : Packrat.Errors.Error_Info_Array :=
            ((+"WORD", 1), (+"WHITESPACE", 1));
    begin
        My_Scanner.Scan (Test_Str, Result);
        return Fail;
    exception
        when Msg : Packrat.Lexer_Error =>
            if Packrat.Errors.Decode (Except.Exception_Message (Msg)) /= Expected_Errors then
                return Fail;
            end if;
            return Pass;
    end Scan_Set_Error_Check;


    function Scan_Set_With_Error_Check
        return Test_Result
    is
        use type Packrat.Errors.Error_Info_Array;

        Sentinel : Integer := 1;
        function Get_Input
            return String is
        begin
            if Sentinel > 0 then
                Sentinel := 0;
                return "()()";
            else
                return "";
            end if;
        end Get_Input;

        package My_Scanner is new Swordy.Scan_Set_With
           ((Stamp_Word'Access, Ignore_Whitespace'Access),
            Latin.EOT, Swordy_Traits.Tokens.Create (Blank, 1, ""));

        Result : Swordy_Traits.Tokens.Token_Array (1 .. 5);

        Expected_Errors : Packrat.Errors.Error_Info_Array :=
            ((+"WORD", 1), (+"WHITESPACE", 1));
    begin
        My_Scanner.Scan (Get_Input'Unrestricted_Access, Result);
        return Fail;
    exception
        when Msg : Packrat.Lexer_Error =>
            if Packrat.Errors.Decode (Except.Exception_Message (Msg)) /= Expected_Errors then
                return Fail;
            end if;
            return Pass;
    end Scan_Set_With_Error_Check;


end Rat_Tests.Lexers;