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Joris van der Hoeven
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From : Sam Liddicott <address@hidden>- To: TeXmacs user list <address@hidden>
- Subject: surprise of the day - with
- Date: Tue, 13 Feb 2024 12:01:48 +0000
Today I was surprised by how "with" will spring a variable into existence permanently (texmacs 2.1.2 pre-compiled deb for ubuntu focal).
dummy briefly exists temp-value
dummy finally exists ? <--- this line shouldn't exist
What do you think this will do?
<if|<provides|dummy>|dummy exists <value|dummy>>
<with|dummy|temp-value|<if|<provides|dummy>|dummy briefly exists <value|dummy>>>
<if|<provides|dummy>|dummy finally exists <value|dummy>>
<with|dummy|temp-value|<if|<provides|dummy>|dummy briefly exists <value|dummy>>>
<if|<provides|dummy>|dummy finally exists <value|dummy>>
dummy briefly exists temp-value
dummy finally exists ? <--- this line shouldn't exist
Yep - after using a <with|var|...
the var is now provided for globally -- with label uninit.
the var is now provided for globally -- with label uninit.
This means the <provides| test is weakened and existing macros can be broken by other macros.
Sam
- surprise of the day - with, Sam Liddicott, 02/13/2024
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