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bug#52063: 28.0.60; Confusing presentation of lambda
From: |
Gregory Heytings |
Subject: |
bug#52063: 28.0.60; Confusing presentation of lambda |
Date: |
Wed, 24 Nov 2021 22:37:53 +0000 |
I'm annoyed by this misfeature. If it means nothing to you and others,
so be it.
I fully understand desire to see function values printed as much as
possible as their original source code, but it's hard to reconcile this
with the needs of clean semantics, efficient execution, good code
analysis, ...
AFAIU, the fundamental question here is: is "(closure (t) args body)"
different in any way from "(lambda args body)"? If not, is there a good
reason to use a "(closure (t)" instead of a "(lambda"?
FWIW, I'm running an Emacs with the following patch right now, which
apparently breaks a couple of edebug tests in make check. Apart from
that, it seems that it doesn't change anything in the way Emacs behaves.
diff --git a/src/eval.c b/src/eval.c
index 94ad060773..5d02cabaf4 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -564,6 +564,8 @@ DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED,
0,
xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args));
if (!NILP (Vinternal_interpreter_environment)
+ && !(EQ (Fcar (Vinternal_interpreter_environment), Qt) &&
+ NILP (Fcdr (Vinternal_interpreter_environment)))
&& CONSP (quoted)
&& EQ (XCAR (quoted), Qlambda))
{ /* This is a lambda expression within a lexical environment;
- bug#52063: 28.0.60; Confusing presentation of lambda, (continued)
- bug#52063: 28.0.60; Confusing presentation of lambda, Jim Porter, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Eduardo Ochs, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Filipp Gunbin, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Stefan Monnier, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Filipp Gunbin, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Stefan Monnier, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Eli Zaretskii, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Stefan Monnier, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Eli Zaretskii, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Stefan Monnier, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda,
Gregory Heytings <=
- bug#52063: 28.0.60; Confusing presentation of lambda, Filipp Gunbin, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Michael Heerdegen, 2021/11/25
- bug#52063: 28.0.60; Confusing presentation of lambda, Lars Ingebrigtsen, 2021/11/25
- bug#52063: 28.0.60; Confusing presentation of lambda, Michael Heerdegen, 2021/11/25
- bug#52063: 28.0.60; Confusing presentation of lambda, Gregory Heytings, 2021/11/25
- bug#52063: 28.0.60; Confusing presentation of lambda, Philipp Stephani, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Stefan Monnier, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Filipp Gunbin, 2021/11/24
- bug#52063: 28.0.60; Confusing presentation of lambda, Lars Ingebrigtsen, 2021/11/25
- bug#52063: 28.0.60; Confusing presentation of lambda, Stefan Monnier, 2021/11/25