[Info-vax] OpenVMS Programming Languages, Features (was: Re: Oracle Database vs Oracle/Rdb)

[Stephen Hoffman]

On 2019-06-25 16:44:56 +0000, John Reagan said:

> On Tuesday, June 25, 2019 at 12:36:33 PM UTC-4, Neil Rieck wrote:
>> Question: I did not think that Pascal had builtin RMS support (as in 
>> directly opening/reading INDEXED files without resorting to system 
>> calls). At least this was the case back when I last used VAX Pascal. 
>> Was builtin RMS support added to Pascal during the Alpha days -or- are 
>> we using different definitions for "builtin"?
> 
> VAX Pascal V2.0 added the full set of indexed file support back in the 
> early 1980s.  It has a [KEY] attribute, FINDK, options on the OPEN 
> statement etc.  [Well, no support for segmented keys to be full 
> disclosure]

See page 93ff in 
https://vmssoftware.com/docs/VSI_OpenVMS_compilers_and_lpd/pascal/6140_Pascal_User.pdf 



On 2019-06-25 16:16:04 +0000, Neil Rieck said:

> I don't know why, but I often think printf() is built into "C" even 
> though everyone here knows you need to do an "#import <stdio.h>" to 
> pull it in. Sloppy thinking I suppose.

VSI/HPE/HP/Compaq/DEC C hasn't sprouted support for the (non-standard) 
#import nor for @import as yet, though that support may well arise as 
part of the port of the LLVM Clang and Clang++ bits.
https://vmssoftware.com/docs/VSI_OpenVMS_BaseOS/5492_c_users_gd.pdf
http://clang.llvm.org/docs/Modules.html

Akin to what #import provides the developer, the (undocumented, see the 
Freeware) SDL/C_DEV/VMS_DEV/LANG=C tool provides the 
#ifdef/#define/#endif guards that avoid the problems that would 
otherwise arise with multiple #include operations for the same file.

And semi-related and entirely FWIW, there's a pretty good programming 
book bundle available for cheap for a few more days at:
https://www.humblebundle.com/books/programming-packt-books
Includes books on C++, Java, Go, Python, C#, etc...


-- 
Pure Personal Opinion | HoffmanLabs LLC