Ada Programming/Ada 95
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Ada 95 is the second revision of the language, preceded by Ada 83. It was standardized by the ISO in 1995. The Technical Corrigendum 1 was published in June 2001.[1]
New language features
Main additions:[2]
Character set
- Latin-1 (8-bit) character set for identifiers
- Type Character expanded to the 256 values of Latin-1 (8 bits)
- New type Wide_Character (16-bit character type, UCS-2 encoding) and Wide_String
Specialized Needs Annexes
- Annex C, "Systems Programming"
- Annex D, "Real-Time Systems"
- Annex E, "Distributed Systems"
- Annex F, "Information Systems"
- Annex G, "Numerics"
- Annex H, "Safety and Security" (in Ada 2005 renamed to "High Integrity Systems")
Other language additions
Summary of what's new
New keywords
Ada 95 has 6 new keywords with respect to Ada 83 (69 keywords in total):
New pragmas
Added 29 pragmas, removed 5 (38 total):
- pragma All_Calls_Remote
- pragma Asynchronous
- pragma Atomic
- pragma Atomic_Components
- pragma Attach_Handler
- pragma Convention
- pragma Discard_Names
- pragma Elaborate_All
- pragma Elaborate_Body
- pragma Export
- pragma Import
- pragma Inspection_Point
- pragma Interrupt_Handler
- pragma Interrupt_Priority
- pragma Linker_Options
- pragma Locking_Policy
- pragma Normalize_Scalars
- pragma Preelaborate
- pragma Pure
- pragma Queueing_Policy
- pragma Remote_Call_Interface
- pragma Remote_Types
- pragma Restrictions
- pragma Reviewable
- pragma Shared_Passive
- pragma Storage_Size
- pragma Task_Dispatching_Policy
- pragma Volatile
- pragma Volatile_Components
New attributes
Added 52 attributes, removed 7 (85 total):
- Access
- Adjacent
- Alignment
- Bit_Order
- Body_Version
- Caller
- Ceiling
- Class
- Component_Size
- Compose
- Copy_Sign
- Definite
- Denorm
- Exponent
- External_Tag
- Floor
- Fraction
- Identity
- Input
- Leading_Part
- Machine
- Max
- Max_Size_In_Storage_Elements
- Min
- Model
- Model_Emin
- Model_Epsilon
- Model_Mantissa
- Model_Small
- Modulus
- Output
- Partition_ID
- Read
- Remainder
- Round
- Rounding
- Safe_First
- Safe_Last
- Scale
- Scaling
- Signed_Zeros
- Storage_Pool
- Tag
- Truncation
- Unbiased_Rounding
- Unchecked_Access
- Valid
- Version
- Wide_Image
- Wide_Value
- Wide_Width
- Write
New library units
- Ada.Real_Time
- ...
See also
Wikibook
- Ada Programming/Ada 83
- Ada Programming/Ada 2005
- Ada Programming/Ada 2012
- Ada Programming/Keywords
- Ada Programming/Attributes
- Ada Programming/Pragmas
References
- Ada Reference Manual, ISO/IEC 8652:1995(E) with COR.1:2000 (June 2001)
- Annotated Ada Reference Manual, ISO/IEC 8652:1995(E) with COR.1:2000 (June 2001)
- The Ada 95 Rationale: The Language, The Standard (January 1995)
- Ada 95 Quality and Style Guide: Guidelines for Professional Programmers (October 1995)
References
- ↑ "WG9 Standards and Projects". http://www.open-std.org/jtc1/sc22/wg9/projects.htm. Retrieved 2008-06-09. "The Corrigendum is approved and was published in June 2001."
- ↑ Naomi Hamilton. "The A-Z of Programming Languages: Ada". Computerworld. http://www.techworld.com.au/article/223388/-z_programming_languages_ada?pp=1. Retrieved 2008-06-09. "The "big three" Ada 95 language revisions were Hierarchical Libraries, Protected Objects, and Object-Oriented Programming."
External links
- Tucker Taft (1994). "Ada 9X for Embedded Systems Development". http://archive.adaic.com/docs/reports/taft/eet-940606.html. Retrieved 2008-06-04.
- David L. Moore (1995-10-01). "Object-Oriented Facilities in Ada 95". Dr. Dobb's Journal. http://www.ddj.com/184409641. Retrieved 2008-06-04.
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