A.6 Input-Output
1/2
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AI95-00285-01}
[
Input-output is provided through
language-defined packages, each of which is a child of the root package
Ada. The generic packages Sequential_IO and Direct_IO define input-output
operations applicable to files containing elements of a given type. The
generic package Storage_IO supports reading from and writing to an in-memory
buffer. Additional operations for text input-output are supplied in the
packages Text_IO
, and Wide_Text_IO
, and Wide_Wide_Text_IO.
Heterogeneous input-output is provided through the child packages Streams.Stream_IO
and Text_IO.Text_Streams (see also
13.13).
The package IO_Exceptions defines the exceptions needed by the predefined
input-output packages.]
Inconsistencies With Ada 83
1.a
The introduction of Append_File
as a new element of the enumeration type File_Mode in Sequential_IO and
Text_IO, and the introduction of several new declarations in Text_IO,
may result in name clashes in the presence of
use clauses.
Extensions to Ada 83
1.b
Text_IO enhancements (Get_Immediate,
Look_Ahead, Standard_Error, Modular_IO, Decimal_IO), Wide_Text_IO, and
the stream input-output facilities are new in Ada 95.
Wording Changes from Ada 83
1.c
RM83-14.6, "Low Level Input-Output,"
is removed. This has no semantic effect, since the package was entirely
implementation defined, nobody actually implemented it, and if they did,
they can always provide it as a vendor-supplied package.
Wording Changes from Ada 95
1.d/2
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AI95-00285-01}
Included package Wide_Wide_Text_IO in this description.
Ada 2005 and 2012 Editions sponsored in part by Ada-Europe
