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Date: Fri, 10 Mar 2023 18:50:06 +0100
Author: Steffen Nurpmeso <steffen@sdaoden.eu>
From: Steffen Nurpmeso <steffen@sdaoden.eu>
To: Phil Budne <phil@ultimate.com>
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Subject: [TUHS] Re: I can't drive 55: "GOTO considered harmful" 55th anniversary
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Phil Budne wrote in
 <202303101630.32AGU2OD008070@ultimate.com>:
 |ron@ronnatalie.com wrote:
 |> Multilevel breaks are as bad as goto with regard to structure violation.
 |
 |Back when I was in compilers (so long ago, that it was the DEC PDP-10
 |FORTRAN compiler(*)) my recall is that break/continue never generated
 |irreducible flow graphs, as goto can:
 |
 |https://en.wikipedia.org/wiki/Control-flow_graph#Reducibility
 |
 |I still remember the days when you could find C code written by PASCAL
 |programmers,[.]

 |littered[.]

I love this.

 |with condition variables on loops, and if
 |statements to not execute the tail of the loop body if the loop
 |condition was false.
 |
 |(*) The FORTRAN compiler was written in BLISS-10, which had labeled
 |statements, and a "leave <label>" construct which was only legal
 |inside the labeled statement:
 |
 |http://www.bitsavers.org/pdf/dec/pdp10/TOPS10/DEC-10-LBRMA-A-D_BLISS-10_\
 |Programmers_Manual_Ver_4_Feb74.pdf#page=42
 --End of <202303101630.32AGU2OD008070@ultimate.com>

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)