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A.6 Input-Output
1
[
{input} {output}
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. 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
{inconsistencies with Ada 83}
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
{extensions to Ada 83}
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.
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