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2.9 Reserved Words
Syntax
1/1
This
paragraph was deleted.
2
{reserved word}
The following are the
reserved words (ignoring
upper/lower case distinctions):
2.a
Discussion: Reserved words
have special meaning in the syntax. In addition, certain reserved words
are used as attribute names.
2.b
The syntactic category identifier
no longer allows reserved words. We have added the few reserved words
that are legal explicitly to the syntax for attribute_reference.
Allowing identifier to include reserved words has been a source of confusion
for some users, and differs from the way they are treated in the C and
Pascal language definitions.
| abort | else | new | return |
|
| abs | elsif | not | reverse |
|
| abstract | end | null | |
|
| accept | entry | | select |
|
| access | exception | of | separate |
|
| aliased | exit | or | subtype |
|
| all | | others | |
|
| and | for | out | tagged |
|
| array | function | | task |
|
| at | | package | terminate |
|
| | generic | pragma | then |
|
| begin | goto | private | type |
|
| body | | procedure | |
|
| | if | protected | until |
|
| case | in | | use |
|
| constant | is | raise | |
|
| | | range | when |
|
| declare | limited | record | while |
|
| delay | loop | rem | with |
|
| delta | | renames | |
|
| digits | mod | requeue | xor |
|
| do | | | |
|
3
6 The reserved words appear in lower
case boldface in this International Standard, except when used in the designator
of an attribute (see 4.1.4). Lower case boldface
is also used for a reserved word in a string_literal
used as an operator_symbol. This is merely
a convention -- programs may be written in whatever typeface is desired and
available.
Incompatibilities With Ada 83
3.a
{incompatibilities with Ada
83} The following words are not reserved in Ada
83, but are reserved in Ada 95: abstract, aliased, protected,
requeue, tagged, until.
Wording Changes from Ada 83
3.b
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