ISAC: IR2090 analyzed

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VHDL Issue Number:        2090

Language_Version          VHDL-2002
Classification            LRM Terminology, Grammar and Typographical Errors
Summary                   Signature in alias declaration for "not" wrong
Relevant_LRM_Sections     4.3.3.2 Nonobject aliases, page 71
Related_Issues            
Key_Words_and_Phrases     implicit alias declaration
Authors_Name              Peter Ashenden
Authors_Phone_Number      +61 414 709 106
Authors_Fax_Number        
Authors_Email_Address     peter@ashenden.com.au
Authors_Affiliation       Ashenden Designs
Authors_Address1          
Authors_Address2          
Authors_Address3          

Current Status:           Analyzed

Superseded By:

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Date Submitted:           1 April 2006
Date Analyzed:            05 April 2006
Author of Analysis:       Chuck Swart
Revision Number:          1
Date Last Revised:        05 April 2006

Description of Problem
----------------------

In 4.3.3.2 Nonobject aliases, page 71, there is a commented
description of an implicit alias declaration for the "not" operator:
    
    -- alias "not" is STD.STANDARD."not"
    --   [STD.STANDARD.BIT, STD.STANDARD.BIT
    --     return STD.STANDARD.BIT];
    
    It should be
    
    -- alias "not" is STD.STANDARD."not"
    --   [STD.STANDARD.BIT
    --     return STD.STANDARD.BIT];
    

Proposed Resolution
-------------------

Change the description to
    
    -- alias "not" is STD.STANDARD."not"
    --   [STD.STANDARD.BIT
    --     return STD.STANDARD.BIT];
    

VASG-ISAC Analysis & Rationale
------------------------------

The submitter is correct and the change he proposes should be adopted.

VASG-ISAC Recommendation for IEEE Std 1076-2002
-----------------------------------------------

Interpret the LRM as if the Recommendation for Future Revisions had
been adopted.

VASG-ISAC Recommendation for Future Revisions
---------------------------------------------

Change the commented description in 4.3.3.2 as suggested in the
proposed resolution.


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