Re: BTW:ASIS (Looking for Ada source browser

["Samuel T. Harris" <u61783@gsde.hou.us.ray.com>]

Florian Weimer wrote:
> 
> Peter Hermann <ica2ph@iris16.csv.ica.uni-stuttgart.de> writes:
> 
> > How far does ASIS support references to source code lines
> > and their original preservation?
> 
> ASIS provides interfaces to retrieve the source code for a given
> element, but I think their implementation is optional.  Whether
> comments are included is implementation-depend as well, I think.
> 
> In any case, the source code has been converted to Unicode from the
> original representation.


Yes. You will need to query the asis.environment as to the support.
Specifically ...

    function Is_Line_Number_Supported return Boolean;  
------------------------------------------------------------------------------
-- Returns True if the implementation can return valid line numbers for
-- Elements.
--
-- An implementation may choose to ignore line number values in which case
-- this function returns False.
------------------------------------------------------------------------------

    function Is_Span_Column_Position_Supported return Boolean;  
------------------------------------------------------------------------------
-- Returns True if the implementation can return valid character positions for
-- elements.
--
-- An implementation may choose to ignore column character position values
-- within spans in which case this function returns False.  This function will
-- be False if Is_Line_Number_Supported = False.
------------------------------------------------------------------------------

... Note that Is_Span_Column_Position_Supported is false if
Is_Line_Number_Supported is false so Is_Span_Column_Position_Supported
may be the only one you need to check if you need text spans.

As far as comments are concerned, you will also need to check ...

    function Is_Commentary_Supported return Boolean;  
------------------------------------------------------------------------------
-- Returns True if the implementation can return comments.
--
-- An implementation may choose to ignore comments in the text in which case
-- the function Is_Commentary_Supported returns False.
------------------------------------------------------------------------------

... in order to get the full functionality of a code browser.

-- 
Samuel T. Harris, Principal Engineer
Raytheon, Aerospace Engineering Services
"If you can make it, We can fake it!"