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[107.215.223.229]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2b6711661c0sm19081504a91.22.2024.05.19.20.55.10 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 19 May 2024 20:55:10 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_7DF97F23-1AA0-4210-9920-8337E45CBDDF" Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3774.600.62\)) Date: Sun, 19 May 2024 20:54:59 -0700 References: To: The Unix Heritage Society mailing list In-Reply-To: Message-Id: X-Mailer: Apple Mail (2.3774.600.62) Message-ID-Hash: BM4K67RE3KZVDBRTSJ5T6WRMD6TURY4I X-Message-ID-Hash: BM4K67RE3KZVDBRTSJ5T6WRMD6TURY4I X-MailFrom: bakul@iitbombay.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: The 'usage: ...' message. (Was: On Bloat...) List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Bakul Shah via TUHS Reply-To: Bakul Shah --Apple-Mail=_7DF97F23-1AA0-4210-9920-8337E45CBDDF Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 I remember helping newbie students at USC who were very confused that = even though they made the changes "PL/C USES", their program didn't = work!=20 > On May 19, 2024, at 5:58=E2=80=AFPM, Rob Pike = wrote: >=20 > The Cornell PL/I compiler, PL/C, ran on the IBM 360 so of course used = batch input. It tried automatically to keep things running after a = parsing error by inserting some token - semicolon, parenthesis, whatever = seemed best - and continuing to parse, in order to maximize the amount = of input that could be parsed before giving up. At least, that's what I = took the motivation to be. It rarely succeeded in fixing the actual = problem, despite PL/I being plastered with semicolons, but it did tend = to ferret out more errors per run. I found the tactic helpful. >=20 > -rob >=20 --Apple-Mail=_7DF97F23-1AA0-4210-9920-8337E45CBDDF Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 I remember = helping newbie students at USC who were very confused that even though = they made the changes "PL/C USES", their program didn't work! 

On May 19, 2024, at 5:58=E2=80=AFPM, Rob Pike = <robpike@gmail.com> wrote:

The = Cornell PL/I compiler, PL/C, ran on the IBM 360 so of course used batch = input. It tried automatically to keep things running after a parsing = error by inserting some token - semicolon, parenthesis, whatever seemed = best - and continuing to parse, in order to maximize the amount of input = that could be parsed before giving up. At least, that's what I took the = motivation to be. It rarely succeeded in fixing the actual problem, = despite PL/I being plastered with semicolons, but it did tend to ferret = out more errors per run. I found the tactic helpful.

-rob


= --Apple-Mail=_7DF97F23-1AA0-4210-9920-8337E45CBDDF--