1
The library package Text_IO has the following declaration:
2
with Ada.IO_Exceptions;
package Ada.Text_IO is
3
type File_Type is limited private;
4
type File_Mode is (In_File, Out_File, Append_File);
5
type Count is range 0 .. implementation−defined;
subtype Positive_Count is Count range 1 .. Count'Last;
Unbounded : constant Count := 0; −− line and page length
6
subtype Field is Integer range 0 .. implementation−defined;
subtype Number_Base is Integer range 2 .. 16;
7
type Type_Set is (Lower_Case, Upper_Case);
8
−− File Management
9
procedure Create (File : in out File_Type;
Mode : in File_Mode := Out_File;
Name : in String := "";
Form : in String := "");
10
procedure Open (File : in out File_Type;
Mode : in File_Mode;
Name : in String;
Form : in String := "");
11
procedure Close (File : in out File_Type);
procedure Delete (File : in out File_Type);
procedure Reset (File : in out File_Type; Mode : in File_Mode);
procedure Reset (File : in out File_Type);
12
function Mode (File : in File_Type) return File_Mode;
function Name (File : in File_Type) return String;
function Form (File : in File_Type) return String;
13
function Is_Open(File : in File_Type) return Boolean;
14
−− Control of default input and output files
15
procedure Set_Input (File : in File_Type);
procedure Set_Output(File : in File_Type);
procedure Set_Error (File : in File_Type);
16
function Standard_Input return File_Type;
function Standard_Output return File_Type;
function Standard_Error return File_Type;
17
function Current_Input return File_Type;
function Current_Output return File_Type;
function Current_Error return File_Type;
18
type File_Access is access constant File_Type;
19
function Standard_Input return File_Access;
function Standard_Output return File_Access;
function Standard_Error return File_Access;
20
function Current_Input return File_Access;
function Current_Output return File_Access;
function Current_Error return File_Access;
21/1
{8652/00518652/0051} {00057AI95−00057−01} −−Buffer control
procedure Flush (File : in File_Type);
procedure Flush;
22
−− Specification of line and page lengths
23
procedure Set_Line_Length(File : in File_Type; To : in Count);
procedure Set_Line_Length(To : in Count);
24
procedure Set_Page_Length(File : in File_Type; To : in Count);
procedure Set_Page_Length(To : in Count);
25
function Line_Length(File : in File_Type) return Count;
function Line_Length return Count;
26
function Page_Length(File : in File_Type) return Count;
function Page_Length return Count;
27
−− Column, Line, and Page Control
28
procedure New_Line (File : in File_Type;
Spacing : in Positive_Count := 1);
procedure New_Line (Spacing : in Positive_Count := 1);
29
procedure Skip_Line (File : in File_Type;
Spacing : in Positive_Count := 1);
procedure Skip_Line (Spacing : in Positive_Count := 1);
30
function End_Of_Line(File : in File_Type) return Boolean;
function End_Of_Line return Boolean;
31
procedure New_Page (File : in File_Type);
procedure New_Page;
32
procedure Skip_Page (File : in File_Type);
procedure Skip_Page;
33
function End_Of_Page(File : in File_Type) return Boolean;
function End_Of_Page return Boolean;
34
function End_Of_File(File : in File_Type) return Boolean;
function End_Of_File return Boolean;
35
procedure Set_Col (File : in File_Type; To : in Positive_Count);
procedure Set_Col (To : in Positive_Count);
36
procedure Set_Line(File : in File_Type; To : in Positive_Count);
procedure Set_Line(To : in Positive_Count);
37
function Col (File : in File_Type) return Positive_Count;
function Col return Positive_Count;
38
function Line(File : in File_Type) return Positive_Count;
function Line return Positive_Count;
39
function Page(File : in File_Type) return Positive_Count;
function Page return Positive_Count;
40
−− Character Input−Output
41
procedure Get(File : in File_Type; Item : out Character);
procedure Get(Item : out Character);
42
procedure Put(File : in File_Type; Item : in Character);
procedure Put(Item : in Character);
43
procedure Look_Ahead (File : in File_Type;
Item : out Character;
End_Of_Line : out Boolean);
procedure Look_Ahead (Item : out Character;
End_Of_Line : out Boolean);
44
procedure Get_Immediate(File : in File_Type;
Item : out Character);
procedure Get_Immediate(Item : out Character);
45
procedure Get_Immediate(File : in File_Type;
Item : out Character;
Available : out Boolean);
procedure Get_Immediate(Item : out Character;
Available : out Boolean);
46
−− String Input−Output
47
procedure Get(File : in File_Type; Item : out String);
procedure Get(Item : out String);
48
procedure Put(File : in File_Type; Item : in String);
procedure Put(Item : in String);
49
procedure Get_Line(File : in File_Type;
Item : out String;
Last : out Natural);
procedure Get_Line(Item : out String; Last : out Natural);
49.1/2
{00301AI95−00301−01} function Get_Line(File : in File_Type) return String;
function Get_Line return String;
50
procedure Put_Line(File : in File_Type; Item : in String);
procedure Put_Line(Item : in String);
51
−− Generic packages for Input−Output of Integer Types
52
generic
type Num is range <>;
package Integer_IO is
53
Default_Width : Field := Num'Width;
Default_Base : Number_Base := 10;
54
procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0);
procedure Get(Item : out Num;
Width : in Field := 0);
55
procedure Put(File : in File_Type;
Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base);
procedure Put(Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base);
procedure Get(From : in String;
Item : out Num;
Last : out Positive);
procedure Put(To : out String;
Item : in Num;
Base : in Number_Base := Default_Base);
56
end Integer_IO;
57
generic
type Num is mod <>;
package Modular_IO is
58
Default_Width : Field := Num'Width;
Default_Base : Number_Base := 10;
59
procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0);
procedure Get(Item : out Num;
Width : in Field := 0);
60
procedure Put(File : in File_Type;
Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base);
procedure Put(Item : in Num;
Width : in Field := Default_Width;
Base : in Number_Base := Default_Base);
procedure Get(From : in String;
Item : out Num;
Last : out Positive);
procedure Put(To : out String;
Item : in Num;
Base : in Number_Base := Default_Base);
61
end Modular_IO;
62
−− Generic packages for Input−Output of Real Types
63
generic
type Num is digits <>;
package Float_IO is
64
Default_Fore : Field := 2;
Default_Aft : Field := Num'Digits−1;
Default_Exp : Field := 3;
65
procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0);
procedure Get(Item : out Num;
Width : in Field := 0);
66
procedure Put(File : in File_Type;
Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
procedure Put(Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
67
procedure Get(From : in String;
Item : out Num;
Last : out Positive);
procedure Put(To : out String;
Item : in Num;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
end Float_IO;
68
generic
type Num is delta <>;
package Fixed_IO is
69
Default_Fore : Field := Num'Fore;
Default_Aft : Field := Num'Aft;
Default_Exp : Field := 0;
70
procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0);
procedure Get(Item : out Num;
Width : in Field := 0);
71
procedure Put(File : in File_Type;
Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
procedure Put(Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
72
procedure Get(From : in String;
Item : out Num;
Last : out Positive);
procedure Put(To : out String;
Item : in Num;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
end Fixed_IO;
73
generic
type Num is delta <> digits <>;
package Decimal_IO is
74
Default_Fore : Field := Num'Fore;
Default_Aft : Field := Num'Aft;
Default_Exp : Field := 0;
75
procedure Get(File : in File_Type;
Item : out Num;
Width : in Field := 0);
procedure Get(Item : out Num;
Width : in Field := 0);
76
procedure Put(File : in File_Type;
Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
procedure Put(Item : in Num;
Fore : in Field := Default_Fore;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
77
procedure Get(From : in String;
Item : out Num;
Last : out Positive);
procedure Put(To : out String;
Item : in Num;
Aft : in Field := Default_Aft;
Exp : in Field := Default_Exp);
end Decimal_IO;
78
−− Generic package for Input−Output of Enumeration Types
79
generic
type Enum is (<>);
package Enumeration_IO is
80
Default_Width : Field := 0;
Default_Setting : Type_Set := Upper_Case;
81
procedure Get(File : in File_Type;
Item : out Enum);
procedure Get(Item : out Enum);
82
procedure Put(File : in File_Type;
Item : in Enum;
Width : in Field := Default_Width;
Set : in Type_Set := Default_Setting);
procedure Put(Item : in Enum;
Width : in Field := Default_Width;
Set : in Type_Set := Default_Setting);
83
procedure Get(From : in String;
Item : out Enum;
Last : out Positive);
procedure Put(To : out String;
Item : in Enum;
Set : in Type_Set := Default_Setting);
end Enumeration_IO;
84
−− Exceptions
85
Status_Error : exception renames IO_Exceptions.Status_Error;
Mode_Error : exception renames IO_Exceptions.Mode_Error;
Name_Error : exception renames IO_Exceptions.Name_Error;
Use_Error : exception renames IO_Exceptions.Use_Error;
Device_Error : exception renames IO_Exceptions.Device_Error;
End_Error : exception renames IO_Exceptions.End_Error;
Data_Error : exception renames IO_Exceptions.Data_Error;
Layout_Error : exception renames IO_Exceptions.Layout_Error;
private
... −− not specified by the language
end Ada.Text_IO;
86/2
{00360AI95−00360−01} The type File_Type needs finalization (see 7.6).
86.a
{incompatibilities with Ada 83} Append_File is a new element of enumeration type File_Mode.
86.b
{extensions to Ada 83} Get_Immediate, Look_Ahead, the subprograms for dealing with standard error, the type File_Access and its associated subprograms, and the generic packages Modular_IO and Decimal_IO are new in Ada 95.
86.c/2
{00360AI95−00360−01} {incompatibilities with Ada 95} Amendment Correction: Text_IO.File_Type is defined to need finalization. If the restriction No_Nested_Finalization (see D.7) applies to the partition, and File_Type does not have a controlled part, it will not be allowed in local objects in Ada 2005 whereas it would be allowed in original Ada 95. Such code is not portable, as another Ada compiler may have a controlled part in File_Type, and thus would be illegal.
86.d/2
{8652/00518652/0051} {00057AI95−00057−01} Corrigendum: Corrected the parameter mode of Flush; otherwise it could not be used on Standard_Output.
86.e/2
{00301AI95−00301−01} The Text_IO.Get_Line functions are new; they are described in A.10.7, "A.10.7 Input-Output of Characters and Strings".