summaryrefslogtreecommitdiff
path: root/src/packrat-errors.ads
blob: 57d7b9b37e939e6d80b29fb9b328d684d04ae197 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81


package Packrat.Errors is


    subtype Error_Message is String
        with Dynamic_Predicate => Valid_Message (Error_Message);

    type Error_Info is record
        Symbol   : Ada.Strings.Unbounded.Unbounded_String;
        Position : Natural;
    end record;

    type Error_Info_Array is array (Positive range <>) of Error_Info;


    --  Note: No consideration is given to ordering of Error_Info items
    --        encoded into an Error_Message string.

    --  Note: Using "&" to join two Valid Error_Messages together
    --        will result in an Error_Message that is also Valid,
    --        but for best results Join should be used instead to
    --        prevent duplication of Error_Info in the message.


    function Valid_Identifier
           (Check : in String)
        return Boolean;

    function Valid_Identifier
           (Check : in Ada.Strings.Unbounded.Unbounded_String)
        return Boolean;

    function Valid_Identifier_Array
           (Check : in Error_Info_Array)
        return Boolean;

    function Valid_Message
           (Check : in String)
        return Boolean;

    function Debug_String
           (This : in Error_Message)
        return String;


    function Join
           (Left, Right : in Error_Message)
        return Error_Message;


    function Encode
           (Name : in String;
            Pos  : in Natural)
        return Error_Message
    with Pre => Valid_Identifier (Name);

    function Encode
           (Name : in Ada.Strings.Unbounded.Unbounded_String;
            Pos  : in Natural)
        return Error_Message
    with Pre => Valid_Identifier (Name);

    function Encode
           (Info : in Error_Info)
        return Error_Message
    with Pre => Valid_Identifier (Info.Symbol);

    function Encode_Array
           (Info : in Error_Info_Array)
        return Error_Message
    with Pre => Valid_Identifier_Array (Info);

    function Decode
           (Msg : in Error_Message)
        return Error_Info_Array;


end Packrat.Errors;