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Date: Wed, 14 Apr 2021 16:22:56 +0100 (BST)
From: Peter Stephenson
To: Daniel Shahaf , zsh-workers@zsh.org
Message-ID: <994269365.178120.1618413776846@mail2.virginmedia.com>
In-Reply-To: <20210414150337.GA23748@tarpaulin.shahaf.local2>
References: <20210414150337.GA23748@tarpaulin.shahaf.local2>
Subject: Re: PM_TAGGED and PM_TAGGED_LOCAL being set simultaneously
(functions -T -t f)
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> On 14 April 2021 at 16:03 Daniel Shahaf wrote:
> As y'all recall, =C2=ABfunctions -T=C2=BB and =C2=AB-t=C2=BB set the XTRA=
CE option for calls
> to the named function.
>=20
> With that in mind, in the following code:
>=20
> [[[
> f() g
> g() :
> functions -T f
> functions -t f
> f
> ]]]
>=20
> Should XTRACE be on or off when g is run? Or should an error be raised
> before g is called?
>=20
> And if -t were set first and -T second?
The way the documentation is written:
The flag -t turns on execution tracing for this function;
the flag -T does the same, but turns off tracing for any named (not
anonymous) function called from the present one, unless that func=E2=80=
=90
tion also has the -t or -T flag.
makes it sound as if turning off for called functions is more powerful beha=
viour,
in which case -T should always be used if specified. But it doesn't actual=
ly
*say* that and could be rewritten anyway, so it's not much of a steer. Hav=
ing
one flag cause another to be ignored is pretty standard behaviour and relat=
ively
straightforward to implement, though.
pws