The Ada language allows
for certain machine dependences in a controlled manner. Each
Ada implementation must document all implementation-defined characteristics:
2/2
Whether or not each recommendation
given in Implementation Advice is followed — see M.3,
“Implementation Advice” for a listing.
See 1.1.2(37).
3
Capacity limitations of the implementation.
See 1.1.3(3).
4
Variations from the standard that
are impractical to avoid given the implementation's execution environment.
See 1.1.3(6).
5
Which code_statements
cause external interactions. See 1.1.3(10).
5.1/2
The semantics of an Ada program whose
text is not in Normalization Form KC. See 2.1(4.1/2).
6
The coded representation for the text
of an Ada program. See 2.1(4/2).
7/2
This paragraph
was deleted.
8
The representation for an end of line.
See 2.2(2/2).
9
Maximum supported line length and
lexical element length. See 2.2(14).
The sequence of characters of the
value returned by S'Wide_Image when some of the graphic characters of
S'Wide_Wide_Image are not defined in Wide_Character. See 3.5(30/2).
12/2
The sequence of characters of the
value returned by S'Image when some of the graphic characters of S'Wide_Wide_Image
are not defined in Character. See 3.5(37/2).
13
The predefined integer types declared
in Standard. See 3.5.4(25).
14
Any nonstandard integer types and
the operators defined for them. See 3.5.4(26).
15
Any nonstandard real types and the
operators defined for them. See 3.5.6(8).
16
What combinations of requested decimal
precision and range are supported for floating point types. See 3.5.7(7).
17
The predefined floating point types
declared in Standard. See 3.5.7(16).
18
The small of an ordinary fixed
point type. See 3.5.9(8/2).
19
What combinations of small,
range, and digits are supported for fixed point types. See 3.5.9(10).
19.1/2
The sequence of characters of the
value returned by Tags.Expanded_Name (respectively, Tags.Wide_Expanded_Name)
when some of the graphic characters of Tags.Wide_Wide_Expanded_Name are
not defined in Character (respectively, Wide_Character). See 3.9(10.1/2).
20/2
The result of Tags.Wide_Wide_Expanded_Name
for types declared within an unnamed block_statement.
See 3.9(10).
21
Implementation-defined attributes.
See 4.1.4(12/1).
21.1/2
Rounding of real static expressions
which are exactly half-way between two machine numbers. See 4.9(38/2).
22
Any implementation-defined time types.
See 9.6(6).
23
The time base associated with relative
delays. See 9.6(20).
24
The time base of the type Calendar.Time.
See 9.6(23).
25/2
The time zone used for package Calendar
operations. See 9.6(24/2).
26
Any limit on delay_until_statements
of select_statements. See 9.6(29).
26.1/2
The result of Calendar.Formating.Image
if its argument represents more than 100 hours. See 9.6.1(86/2).
27
Whether or not two nonoverlapping
parts of a composite object are independently addressable, in the case
where packing, record layout, or Component_Size is specified for the
object. See 9.10(1).
28
The representation for a compilation.
See 10.1(2).
29
Any restrictions on compilations
that contain multiple compilation_units.
See 10.1(4).
29.1/2
The mechanisms for adding a unit mentioned
in a limited_with_clause to an environment.
See 10.1.4(3/2).
30
The mechanisms for creating an environment
and for adding and replacing compilation units. See 10.1.4(3/2).
31
The implementation-defined means,
if any, of specifying which compilation units are needed by a given compilation
unit. See 10.2(2).
32
The manner of explicitly assigning
library units to a partition. See 10.2(2).
33
The manner of designating the main
subprogram of a partition. See 10.2(7).
34
The order of elaboration of library_items.
See 10.2(18).
35
Parameter passing and function return
for the main subprogram. See 10.2(21).
36
The mechanisms for building and running
partitions. See 10.2(24).
37
The details of program execution,
including program termination. See 10.2(25).
38
The semantics of any nonactive partitions
supported by the implementation. See 10.2(28).
39
The information returned by Exception_Message.
See 11.4.1(10.1/2).
39.1/2
The sequence of characters of the
value returned by Exceptions.Exception_Name (respectively, Exceptions.Wide_Exception_Name)
when some of the graphic characters of Exceptions.Wide_Wide_Exception_Name
are not defined in Character (respectively, Wide_Character). See 11.4.1(12.1/2).
40/2
The result of Exceptions.Wide_Wide_Exception_Name
for exceptions declared within an unnamed block_statement.
See 11.4.1(12).
41
The information returned by Exception_Information.
See 11.4.1(13/2).
41.1/2
Implementation-defined policy_identifiers
allowed in a pragma Assertion_Policy.
See 11.4.2(9/2).
The meaning of Size for indefinite
subtypes. See 13.3(49).
46
The default external representation
for a type tag. See 13.3(76/1).
47
What determines whether a compilation
unit is the same in two different partitions. See 13.3(77).
48
Implementation-defined components.
See 13.5.1(15).
49
If Word_Size = Storage_Unit, the default
bit ordering. See 13.5.3(5).
50/2
The contents of the visible part of
package System. See 13.7(2).
50.1/2
The range of Storage_Elements.Storage_Offset,
the modulus of Storage_Elements.Storage_Element, and the declaration
of Storage_Elements.Integer_Address.. See 13.7.1(11).
51
The contents of the visible part of
package System.Machine_Code, and the meaning of code_statements.
See 13.8(7).
52/2
The effect of unchecked conversion
for instances with nonscalar result types whose effect is not defined
by the language. See 13.9(11).
52.1/2
The result of unchecked conversion
for instances with scalar result types whose result is not defined by
the language. See 13.9(11).
53
Whether or not the implementation
provides user-accessible names for the standard pool type(s). See 13.11(17).
54/2
This paragraph
was deleted.
55/2
The meaning of Storage_Size when neither
the Storage_Size nor the Storage_Pool is specified for an access type.
See 13.11(18).
56/2
This paragraph
was deleted.
57
The set of restrictions
allowed in a pragma Restrictions.
See 13.12(7).
58
The consequences of violating limitations
on Restrictions pragmas. See 13.12(9).
59/2
The contents of the stream elements
read and written by the Read and Write attributes of elementary types.
See 13.13.2(9).
60
The names and characteristics of the
numeric subtypes declared in the visible part of package Standard. See
A.1(3).
60.1/2
The values returned by Strings.Hash.
See A.4.9(3/2).
61
The accuracy actually achieved by
the elementary functions. See A.5.1(1).
62
The sign of a zero result from some
of the operators or functions in Numerics.Generic_Elementary_Functions,
when Float_Type'Signed_Zeros is True. See A.5.1(46).
63
The value of Numerics.Discrete_Random.Max_Image_Width.
See A.5.2(27).
64
The value of Numerics.Float_Random.Max_Image_Width.
See A.5.2(27).
65/2
This paragraph
was deleted.
66
The string representation of a random
number generator's state. See A.5.2(38).
67/2
This paragraph
was deleted.
68
The values of the Model_Mantissa,
Model_Emin, Model_Epsilon, Model, Safe_First, and Safe_Last attributes,
if the Numerics Annex is not supported. See A.5.3(72).
69/2
This paragraph
was deleted.
70
The value of Buffer_Size in Storage_IO.
See A.9(10).
71/2
The external files associated with
the standard input, standard output, and standard error files. See A.10(5).
72
The accuracy of the value produced
by Put. See A.10.9(36).
72.1/1
Current size for a stream file for
which positioning is not supported. See A.12.1(1.1/1).
73/2
The meaning of Argument_Count, Argument,
and Command_Name for package Command_Line. The bounds of type Command_Line.Exit_Status.
See A.15(1).
73.1/2
The interpretation of file names and
directory names. See A.16(46/2).
73.2/2
The maximum value for a file size
in Directories. See A.16(87/2).
73.3/2
The result for Directories.Size for
a directory or special file See A.16(93/2).
73.4/2
The result for Directories.Modification_Time
for a directory or special file. See A.16(95/2).
73.5/2
The interpretation of a non-null search
pattern in Directories. See A.16(104/2).
73.6/2
The results of a Directories search
if the contents of the directory are altered while a search is in progress.
See A.16(110/2).
73.7/2
The definition and meaning of an environment
variable. See A.17(1/2).
73.8/2
The circumstances where an environment
variable cannot be defined. See A.17(16/2).
73.9/2
Environment names for which Set has
the effect of Clear. See A.17(17/2).
73.10/2
The value of Containers.Hash_Type'Modulus.
The value of Containers.Count_Type'Last. See A.18.1(7/2).
74
Implementation-defined convention
names. See B.1(11).
75
The manner of choosing link names
when neither the link name nor the address of an imported or exported
entity is specified. See B.1(36).
The contents of the visible part of
package Interfaces and its language-defined descendants. See B.2(1).
79/2
Implementation-defined children of
package Interfaces. See B.2(11).
79.1/2
The definitions of certain types and
constants in Interfaces.C. See B.3(41).
80/1
The types Floating, Long_Floating,
Binary, Long_Binary, Decimal_Element, and COBOL_Character; and the initializations
of the variables Ada_To_COBOL and COBOL_To_Ada, in Interfaces.COBOL.
See B.4(50).
80.1/1
The types Fortran_Integer, Real, Double_Precision,
and Character_Set in Interfaces.Fortran. See B.5(17).
81/2
Implementation-defined intrinsic subprograms.
See C.1(1).
82/2
This paragraph
was deleted.
83/2
This paragraph
was deleted.
83.1/2
Any restrictions on a protected procedure
or its containing type when a pragma
Attach_handler or Interrupt_Handler applies. See C.3.1(17).
83.2/2
Any other forms of interrupt handler
supported by the Attach_Handler and Interrupt_Handler pragmas. See C.3.1(19).
84/2
This paragraph
was deleted.
85
The semantics of pragma Discard_Names.
See C.5(7).
86
The result of the Task_Identification.Image
attribute. See C.7.1(7).
87/2
The value of Current_Task when in
a protected entry, interrupt handler, or finalization of a task attribute.
See C.7.1(17/2).
88/2
This paragraph
was deleted.
88.1/1
Granularity of locking for Task_Attributes.
See C.7.2(16/1).
89/2
This paragraph
was deleted.
90/2
This paragraph
was deleted.
91
The declarations of Any_Priority and
Priority. See D.1(11).
92
Implementation-defined execution resources.
See D.1(15).
93
Whether, on a multiprocessor, a task
that is waiting for access to a protected object keeps its processor
busy. See D.2.1(3).
94
The affect of implementation defined
execution resources on task dispatching. See D.2.1(9/2).
95/2
This paragraph
was deleted.
96/2
This paragraph
was deleted.
97/2
Implementation defined task dispatching
policies. See D.2.2(18).
98
Implementation defined task dispatching.
See D.2.2(18).
98.1/2
The value of Default_Quantum in Dispatching.Round_Robin.
See D.2.5(4).
99
Implementation-defined policy_identifiers
allowed in a pragma Locking_Policy.
See D.3(4).
The ceiling of any protected object
used internally by the implementation. See D.3(16).
102
Implementation-defined queuing policies.
See D.4(1/1).
103/2
This paragraph
was deleted.
104
Any operations that implicitly require
heap storage allocation. See D.7(8).
104.1/2
When restriction No_Task_Termination
applies to a partition, what happens when a task terminates. See D.7(15.1/2).
104.2/2
The behavior when restriction Max_Storage_At_Blocking
is violated. See D.7(17/1).
104.3/2
The behavior when restriction Max_Asynchronous_Select_Nesting
is violated. See D.7(18/1).
104.4/2
The behavior when restriction Max_Tasks
is violated. See D.7(19).
105/2
Whether the use of pragma Restrictions
results in a reduction in program code or data size or execution time.
See D.7(20).
106/2
This paragraph
was deleted.
107/2
This paragraph
was deleted.
108/2
This paragraph
was deleted.
109
The means for creating and executing
distributed programs. See E(5).
110
Any events that can result in a partition
becoming inaccessible. See E.1(7).
111
The scheduling policies, treatment
of priorities, and management of shared resources between partitions
in certain cases. See E.1(11).
112/1
This paragraph
was deleted.
113
Whether the execution of the remote
subprogram is immediately aborted as a result of cancellation. See E.4(13).
113.1/2
The range of type System.RPC.Partition_Id.
See E.5(14).
114/2
This paragraph
was deleted.
115
Implementation-defined interfaces
in the PCS. See E.5(26).
116
The values of named numbers in the
package Decimal. See F.2(7).
117
The value of Max_Picture_Length in
the package Text_IO.Editing See F.3.3(16).
118
The value of Max_Picture_Length in
the package Wide_Text_IO.Editing See F.3.4(5).
118.1/2
The value of Max_Picture_Length in
the package Wide_Wide_Text_IO.Editing See F.3.5(5).
119
The accuracy actually achieved by
the complex elementary functions and by other complex arithmetic operations.
See G.1(1).
120
The sign of a zero result (or a component
thereof) from any operator or function in Numerics.Generic_Complex_Types,
when Real'Signed_Zeros is True. See G.1.1(53).
121
The sign of a zero result (or a component
thereof) from any operator or function in Numerics.Generic_Complex_Elementary_Functions,
when Complex_Types.Real'Signed_Zeros is True. See G.1.2(45).
122
Whether the strict mode or the relaxed
mode is the default. See G.2(2).
123
The result interval in certain cases
of fixed-to-float conversion. See G.2.1(10).
124
The result of a floating point arithmetic
operation in overflow situations, when the Machine_Overflows attribute
of the result type is False. See G.2.1(13).
125
The result interval for division (or
exponentiation by a negative exponent), when the floating point hardware
implements division as multiplication by a reciprocal. See G.2.1(16).
126
The definition of close result
set, which determines the accuracy of certain fixed point multiplications
and divisions. See G.2.3(5).
127
Conditions on a universal_real
operand of a fixed point multiplication or division for which the result
shall be in the perfect result set. See G.2.3(22).
128
The result of a fixed point arithmetic
operation in overflow situations, when the Machine_Overflows attribute
of the result type is False. See G.2.3(27).
129
The result of an elementary function
reference in overflow situations, when the Machine_Overflows attribute
of the result type is False. See G.2.4(4).
130
The accuracy of certain elementary
functions for parameters beyond the angle threshold. See G.2.4(10).
131
The value of the angle threshold,
within which certain elementary functions, complex arithmetic operations,
and complex elementary functions yield results conforming to a maximum
relative error bound. See G.2.4(10).
132
The result of a complex arithmetic
operation or complex elementary function reference in overflow situations,
when the Machine_Overflows attribute of the corresponding real type is
False. See G.2.6(5).
133
The accuracy of certain complex arithmetic
operations and certain complex elementary functions for parameters (or
components thereof) beyond the angle threshold. See G.2.6(8).
133.1/2
The accuracy requirements for the
subprograms Solve, Inverse, Determinant, Eigenvalues and Eigensystem
for type Real_Matrix. See G.3.1(81/2).
133.2/2
The accuracy requirements for the
subprograms Solve, Inverse, Determinant, Eigenvalues and Eigensystem
for type Complex_Matrix. See G.3.2(149/2).
134/2
This paragraph
was deleted.
135/2
This paragraph
was deleted.
136/2
This paragraph
was deleted.
137/2
This paragraph
was deleted.
137.1/2
Implementation-defined policy_identifiers
allowed in a pragma Partition_Elaboration_Policy.
See H.6(4/2).