A.6 Input-Output
{
AI95-00285-01}
[
{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,
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
{
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
{
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
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
{
AI95-00285-01}
Included package Wide_Wide_Text_IO in this description.
Sponsored by Ada-Europe