[TUHS] Book Recommendation

[joe mcguckin]

In PL/I, language keywords are not reserved. Makes for interesting work when writing the lex scanner.


Joe McGuckin
ViaNet Communications

joe at via.net
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> On Nov 24, 2021, at 12:15 PM, Rob Pike <robpike at gmail.com> wrote:
> 
> I thought it was
> 
> TRY:PROC OPTIONS(MAIN);
>   DCL (IF,THEN,ELSE) FIXED BINARY (31);
> 
>   IF = 1;
>   THEN = 2;
>   ELSE = 3;
> 
>   IF IF = THEN THEN THEN = IF ; ELSE ELSE IF = THEN = ELSE;
> 
> END TRY;
> 
> But yeah.
> 
> Best to Barry.
> 
> -rob
> 
> On Thu, Nov 25, 2021 at 2:23 AM Richard Salz <rich.salz at gmail.com> wrote:
>> 
>> I asked my pal Barry Shein, who many of you know, if he had his PL/1 syntax horror lying around, and he did.  He said: "this was tested on the Iron Spring Software PL/1 compiler running on openSuSe Linux (http://www.iron-spring.com/)"
>> 
>> IBM still uses PL/1.  Remember, the main definition of "legacy" is "revenue-producing."
>> 
>> TRY:PROC OPTIONS(MAIN);
>>   DCL (IF,THEN,ELSE) FIXED BINARY (31);
>> 
>>   IF = 1;
>>   THEN = 2;
>>   ELSE = 3;
>> 
>>   IF IF = THEN THEN THEN = IF ; ELSE ELSE = THEN;
>> 
>> END TRY;
>> 

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