two Ada95 syntax questions

two Ada95 syntax questions

[bob]

Hi,

 

Does Ada95 support multi-line comments?  (i.e. /*�.*/)  Seems like I
remember some compilers do though I don't see this in the LRM.

Does it support multi-line extensions?  (i.e.:

Blah blah\
Blah  -- blahs all on same line

Re: two Ada95 syntax questions

[Pascal Obry]

robertfm@eforell.com (bob) writes:

> Does Ada95 support multi-line comments?  (i.e. /*О©╫.*/)  Seems like I
> remember some compilers do though I don't see this in the LRM.

No.

> Does it support multi-line extensions?  (i.e.:
> 
> Blah blah\
> Blah  -- blahs all on same line

No. This is not needed. For string it is posssible to use '&' operator which
is handled at compile time.

   Var : constant String := "This is a multi-line string value"
          & " which is analyzed at compile time, so operator '&'"
          & " has no runtime penalty";

Pascal.

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Re: two Ada95 syntax questions

[Dmitry A. Kazakov]

On 9 Mar 2005 10:21:27 -0800, bob wrote:

> Does Ada95 support multi-line comments?  (i.e. /*�.*/)  Seems like I
> remember some compilers do though I don't see this in the LRM.

No
 
> Does it support multi-line extensions?  (i.e.:

No. But there is no need in that. Except for keywords, identifiers,
comments and literals anything else may occupy as many lines you want. For
string literals one can use concatenation:

> Blah blah\
> Blah  -- blahs all on same line

   "Blah blah"
& "Blah"

results in "Blah blahBlah"

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de

Re: two Ada95 syntax questions

[Larry Kilgallen]

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In article <455a31fd.0503091021.7650206e@posting.google.com>, robertfm@eforell.com (bob) writes:

> Does Ada95 support multi-line comments?  (i.e. /*�.*/)  Seems like I
> remember some compilers do though I don't see this in the LRM.

No, it was explicitly _not_ included in the language because of the
hazard of a missing comment terminator.

> Does it support multi-line extensions?  (i.e.:
> 
> Blah blah\
> Blah  -- blahs all on same line

If I understand the question, yes.  Statements can span lines,
although literal strings cannot.  For that, one would say:

	Warning : constant STRING := "Danger, "
                       & "Will Robinson";

Re: two Ada95 syntax questions

[Keith Thompson]

robertfm@eforell.com (bob) writes:
> Does Ada95 support multi-line comments?  (i.e. /*О©╫.*/)  Seems like I
> remember some compilers do though I don't see this in the LRM.

Sure, Ada supports multi-line comments, but not with that syntax.
The syntax is:

    -- This is a
    -- mult-line
    -- comment.

Yes, I'm being facetious; that's really a series of single line comments.

One of the major justifications for multi-line comments is that they
make it easy to comment out a block of code.  With any decent text
editor, it's easy to add or remove a "-- " from each line in a range,
and the result is much more clearly commented out than if you had to
search for the opening and closing delimiters.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
San Diego Supercomputer Center             <*>  <http://users.sdsc.edu/~kst>
We must do something.  This is something.  Therefore, we must do this.