END-PERFORM scope terminator
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From: Roger While on 5 Jul 2008 07:35 Anybody know why the standard does not allow END-PERFORM on an out-of-line PERFORM? (It is, of course, mandated for inline) Roger
From: Anonymous on 5 Jul 2008 09:38 In article <g4nm9l$pqu$01$1(a)news.t-online.com>, Roger While <simrw(a)sim-basis.de> wrote: >Anybody know why the standard does not allow END-PERFORM >on an out-of-line PERFORM? (It is, of course, mandated for inline) I barely know why *I* allow things, let alone anyone else... but if I recall correctly and END-PERFORM terminates execution of statements which follow the preceding PERFORM while an 'undelimited' PERFORM directs execution to the statement following the specified paragraph or section named. The delimiter of an 'original' PERFORM, then, seems to be the period (full stop) which terminates the structure (or range) specified by the imperative. DD
From: Michael Mattias on 5 Jul 2008 09:37 "Roger While" <simrw(a)sim-basis.de> wrote in message news:g4nm9l$pqu$01$1(a)news.t-online.com... > Anybody know why the standard does not allow END-PERFORM > on an out-of-line PERFORM? (It is, of course, mandated for inline) ??? Several standards allow these syntax constructions; a 'standard' by definition is simply a statement of "what should work." However, your compiler (make, model and version not shown) apparently does not support the standard. (Which standard not shown). Or maybe it does but you have not coded it correctly. (Code not shown). MCM
From: Michael Mattias on 5 Jul 2008 10:06 <docdwarf(a)panix.com> wrote in message news:g4ntfq$eso$1(a)reader1.panix.com... > The delimiter of an 'original' PERFORM, then, seems to be the period (full > stop) which terminates the structure (or range) specified by the > imperative. Not quite DD, but close. The delimeter of the original ('out of line' ) PERFORM would be the end of the performed paragraph or section, or until the single imperative statement 'EXIT' is executed... . unless the 'range' option you mention (PERFORM THRU) is used, in which case I generally get lost unless that "THRU" is simply a paragraph containing only the single imperative statement EXIT. That is, a PERFORM'ed paragraph or section may contain one or more full stops which do NOT serve as a scope delimiter for the [out-of-line aka 'original'] PERFORM statement. MCM
From: Michael Mattias on 5 Jul 2008 10:15
>> The delimiter of an 'original' PERFORM, then, seems to be the period >> (full >> stop) which terminates the structure (or range) specified by the >> imperative. I may have misread this. I read it as.... "The delimiter of an 'original' PERFORM, then, seems to be the period (full stop), which terminates the structure (or range) specified by the imperative." ....instead of "The delimiter of an 'original' PERFORM, then, seems to be the period (full stop) which terminates the structure (or range) specified by the imperative." ... as written. The difference is the comma I mentally inserted after "(full stop)" which changes the entire meaning from "any full stop" to "the final full stop found in the named paragraph, section or range." EXIT would not longer figure in the second case, as an EXIT for out-of-line perform must be the entire paragraph of the named "THRU" range. Damn, one little comma changes a lot, huh? MCM |