Process LaTeX code only if package is loaded Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)What do makeatletter and makeatother do?Why is the wrong version of a package being loaded?Did I install a package successfully?LaTeX Errors: “RequirePackage or LoadClass in Options Section.” AND “File 'article.cls' not found.”Unload a LaTeX packageKantlipsum installation processApplying options to already loaded packagePretending a package has been loadedPackage won't get loadedusetikzlibrarypositioning in an expl3 package but PGF Math Error: Unknown function `of'mcode package with java code
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Integration Help
Process LaTeX code only if package is loaded
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)What do makeatletter and makeatother do?Why is the wrong version of a package being loaded?Did I install a package successfully?LaTeX Errors: “RequirePackage or LoadClass in Options Section.” AND “File 'article.cls' not found.”Unload a LaTeX packageKantlipsum installation processApplying options to already loaded packagePretending a package has been loadedPackage won't get loadedusetikzlibrarypositioning in an expl3 package but PGF Math Error: Unknown function `of'mcode package with java code
I would like to create a document used to test diverse packages, and I was wondering if it was possible to use a command so that part of the code is read only if the corresponding package is loaded. I've come up with this but it throws an error which I don't know how to fix.
documentclassarticle
usepackage[utf8]inputenc
makeatletter
newcommandIfPackageLoaded[3]@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
I get this error:
! LaTeX Error: Can be used only in preamble.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.10 IfPackageLoadednatbibnatbib loaded
natbib not loaded
Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.
I also know that the command ltx@ifpackageloaded exists when loading the package ltxcmds but when I try to use it in
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
begindocument
ltx@ifpackageloadednatbibnatbib loadednatbib not loaded
enddocument
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloadednatbibnatbib loadednatbib not loaded
The control sequence at the end of the top line
of your error message was never def'ed. If you have
misspelled it (e.g., `hobx'), type `I' and the correct
spelling (e.g., `Ihbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Can someone please point out what I did wrong?
EDIT: changed documentclass from minimal to article.
packages
asked Apr 10 at 9:46
lashounlashoun
665
add a comment |
I would like to create a document used to test diverse packages, and I was wondering if it was possible to use a command so that part of the code is read only if the corresponding package is loaded. I've come up with this but it throws an error which I don't know how to fix.
documentclassarticle
usepackage[utf8]inputenc
makeatletter
newcommandIfPackageLoaded[3]@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
I get this error:
! LaTeX Error: Can be used only in preamble.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.10 IfPackageLoadednatbibnatbib loaded
natbib not loaded
Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.
I also know that the command ltx@ifpackageloaded exists when loading the package ltxcmds but when I try to use it in
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
begindocument
ltx@ifpackageloadednatbibnatbib loadednatbib not loaded
enddocument
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloadednatbibnatbib loadednatbib not loaded
The control sequence at the end of the top line
of your error message was never def'ed. If you have
misspelled it (e.g., `hobx'), type `I' and the correct
spelling (e.g., `Ihbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Can someone please point out what I did wrong?
EDIT: changed documentclass from minimal to article.
packages
asked Apr 10 at 9:46
lashounlashoun
665
3
You are missing themakeatletterin your second example. And don't use the minimal class, normally it is too minimal.
– Ulrike Fischer
Apr 10 at 9:52
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
Apr 10 at 9:53
It is said in theltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegindocumentthough.
– lashoun
Apr 10 at 9:58
But even then it can only be used if you wrap it inmakeatletter...makeatotherbecause it has an@in its name.
– moewe
Apr 10 at 9:59
Oooh, that's why! I'll try then.
– lashoun
Apr 10 at 10:00
add a comment |
I would like to create a document used to test diverse packages, and I was wondering if it was possible to use a command so that part of the code is read only if the corresponding package is loaded. I've come up with this but it throws an error which I don't know how to fix.
documentclassarticle
usepackage[utf8]inputenc
makeatletter
newcommandIfPackageLoaded[3]@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
I get this error:
! LaTeX Error: Can be used only in preamble.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.10 IfPackageLoadednatbibnatbib loaded
natbib not loaded
Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.
I also know that the command ltx@ifpackageloaded exists when loading the package ltxcmds but when I try to use it in
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
begindocument
ltx@ifpackageloadednatbibnatbib loadednatbib not loaded
enddocument
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloadednatbibnatbib loadednatbib not loaded
The control sequence at the end of the top line
of your error message was never def'ed. If you have
misspelled it (e.g., `hobx'), type `I' and the correct
spelling (e.g., `Ihbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Can someone please point out what I did wrong?
EDIT: changed documentclass from minimal to article.
packages
asked Apr 10 at 9:46
lashounlashoun
665
I would like to create a document used to test diverse packages, and I was wondering if it was possible to use a command so that part of the code is read only if the corresponding package is loaded. I've come up with this but it throws an error which I don't know how to fix.
documentclassarticle
usepackage[utf8]inputenc
makeatletter
newcommandIfPackageLoaded[3]@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
I get this error:
! LaTeX Error: Can be used only in preamble.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.10 IfPackageLoadednatbibnatbib loaded
natbib not loaded
Your command was ignored.
Type I <command> <return> to replace it with another command,
or <return> to continue without it.
I also know that the command ltx@ifpackageloaded exists when loading the package ltxcmds but when I try to use it in
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
begindocument
ltx@ifpackageloadednatbibnatbib loadednatbib not loaded
enddocument
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloadednatbibnatbib loadednatbib not loaded
The control sequence at the end of the top line
of your error message was never def'ed. If you have
misspelled it (e.g., `hobx'), type `I' and the correct
spelling (e.g., `Ihbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Can someone please point out what I did wrong?
EDIT: changed documentclass from minimal to article.
packages
packages
asked Apr 10 at 9:46
lashounlashoun
665
asked Apr 10 at 9:46
lashounlashoun
665
edited Apr 10 at 10:03
lashoun
asked Apr 10 at 9:46
lashounlashoun
665
asked Apr 10 at 9:46
lashounlashoun
665
asked Apr 10 at 9:46
lashounlashoun
665
665
3
You are missing themakeatletterin your second example. And don't use the minimal class, normally it is too minimal.
– Ulrike Fischer
Apr 10 at 9:52
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
Apr 10 at 9:53
It is said in theltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegindocumentthough.
– lashoun
Apr 10 at 9:58
But even then it can only be used if you wrap it inmakeatletter...makeatotherbecause it has an@in its name.
– moewe
Apr 10 at 9:59
Oooh, that's why! I'll try then.
– lashoun
Apr 10 at 10:00
add a comment |
3
You are missing themakeatletterin your second example. And don't use the minimal class, normally it is too minimal.
– Ulrike Fischer
Apr 10 at 9:52
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
Apr 10 at 9:53
It is said in theltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegindocumentthough.
– lashoun
Apr 10 at 9:58
But even then it can only be used if you wrap it inmakeatletter...makeatotherbecause it has an@in its name.
– moewe
Apr 10 at 9:59
Oooh, that's why! I'll try then.
– lashoun
Apr 10 at 10:00
3
3
You are missing the
makeatletter in your second example. And don't use the minimal class, normally it is too minimal.– Ulrike Fischer
Apr 10 at 9:52
You are missing the
makeatletter in your second example. And don't use the minimal class, normally it is too minimal.– Ulrike Fischer
Apr 10 at 9:52
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
Apr 10 at 9:53
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
Apr 10 at 9:53
It is said in the
ltxcmds documentation that ltx@ifpackageloaded can be used after begindocument though.– lashoun
Apr 10 at 9:58
It is said in the
ltxcmds documentation that ltx@ifpackageloaded can be used after begindocument though.– lashoun
Apr 10 at 9:58
But even then it can only be used if you wrap it in
makeatletter...makeatother because it has an @ in its name.– moewe
Apr 10 at 9:59
But even then it can only be used if you wrap it in
makeatletter...makeatother because it has an @ in its name.– moewe
Apr 10 at 9:59
Oooh, that's why! I'll try then.
– lashoun
Apr 10 at 10:00
Oooh, that's why! I'll try then.
– lashoun
Apr 10 at 10:00
add a comment |
1 Answer
1
active
oldest
votes
As users Ulrike Fischer and moewe pointed out, this works:
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
makeatletter
newcommandIfPackageLoaded[3]ltx@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
answered Apr 10 at 10:02
lashounlashoun
665
3
BTW: The[3]is not needed. You can simply usenewcommand*IfPackageLoadedltx@ifpackageloaded.
– Schweinebacke
Apr 10 at 10:08
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
Apr 10 at 10:43
1
@egreg Yes, becauseltx@ifpackageloadedis a simple macro. If it would be, e.g., robust, it could be better to useLetLtxMacrofrom packageletltxmacro. I didn't want to explain all this, so I've only noted about usingnewcommand*without arguments.
– Schweinebacke
Apr 10 at 10:47
Thanks for the precisions
– lashoun
Apr 10 at 12:10
add a comment |
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1 Answer
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oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
As users Ulrike Fischer and moewe pointed out, this works:
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
makeatletter
newcommandIfPackageLoaded[3]ltx@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
answered Apr 10 at 10:02
lashounlashoun
665
3
BTW: The[3]is not needed. You can simply usenewcommand*IfPackageLoadedltx@ifpackageloaded.
– Schweinebacke
Apr 10 at 10:08
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
Apr 10 at 10:43
1
@egreg Yes, becauseltx@ifpackageloadedis a simple macro. If it would be, e.g., robust, it could be better to useLetLtxMacrofrom packageletltxmacro. I didn't want to explain all this, so I've only noted about usingnewcommand*without arguments.
– Schweinebacke
Apr 10 at 10:47
Thanks for the precisions
– lashoun
Apr 10 at 12:10
add a comment |
As users Ulrike Fischer and moewe pointed out, this works:
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
makeatletter
newcommandIfPackageLoaded[3]ltx@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
answered Apr 10 at 10:02
lashounlashoun
665
3
BTW: The[3]is not needed. You can simply usenewcommand*IfPackageLoadedltx@ifpackageloaded.
– Schweinebacke
Apr 10 at 10:08
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
Apr 10 at 10:43
1
@egreg Yes, becauseltx@ifpackageloadedis a simple macro. If it would be, e.g., robust, it could be better to useLetLtxMacrofrom packageletltxmacro. I didn't want to explain all this, so I've only noted about usingnewcommand*without arguments.
– Schweinebacke
Apr 10 at 10:47
Thanks for the precisions
– lashoun
Apr 10 at 12:10
add a comment |
As users Ulrike Fischer and moewe pointed out, this works:
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
makeatletter
newcommandIfPackageLoaded[3]ltx@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
answered Apr 10 at 10:02
lashounlashoun
665
As users Ulrike Fischer and moewe pointed out, this works:
documentclassarticle
usepackage[utf8]inputenc
usepackageltxcmds
makeatletter
newcommandIfPackageLoaded[3]ltx@ifpackageloaded#1#2#3
makeatother
begindocument
IfPackageLoadednatbibnatbib loadednatbib not loaded
enddocument
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
answered Apr 10 at 10:02
lashounlashoun
665
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
edited Apr 10 at 10:06
Schweinebacke
22.8k4578
22.8k4578
answered Apr 10 at 10:02
lashounlashoun
665
answered Apr 10 at 10:02
lashounlashoun
665
answered Apr 10 at 10:02
lashounlashoun
665
665
3
BTW: The[3]is not needed. You can simply usenewcommand*IfPackageLoadedltx@ifpackageloaded.
– Schweinebacke
Apr 10 at 10:08
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
Apr 10 at 10:43
1
@egreg Yes, becauseltx@ifpackageloadedis a simple macro. If it would be, e.g., robust, it could be better to useLetLtxMacrofrom packageletltxmacro. I didn't want to explain all this, so I've only noted about usingnewcommand*without arguments.
– Schweinebacke
Apr 10 at 10:47
Thanks for the precisions
– lashoun
Apr 10 at 12:10
add a comment |
3
BTW: The[3]is not needed. You can simply usenewcommand*IfPackageLoadedltx@ifpackageloaded.
– Schweinebacke
Apr 10 at 10:08
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
Apr 10 at 10:43
1
@egreg Yes, becauseltx@ifpackageloadedis a simple macro. If it would be, e.g., robust, it could be better to useLetLtxMacrofrom packageletltxmacro. I didn't want to explain all this, so I've only noted about usingnewcommand*without arguments.
– Schweinebacke
Apr 10 at 10:47
Thanks for the precisions
– lashoun
Apr 10 at 12:10
3
3
BTW: The
[3] is not needed. You can simply use newcommand*IfPackageLoadedltx@ifpackageloaded.– Schweinebacke
Apr 10 at 10:08
BTW: The
[3] is not needed. You can simply use newcommand*IfPackageLoadedltx@ifpackageloaded.– Schweinebacke
Apr 10 at 10:08
@Schweinebacke RIght; also
letIfPackageLoadedltx@ifpackageloaded– egreg
Apr 10 at 10:43
@Schweinebacke RIght; also
letIfPackageLoadedltx@ifpackageloaded– egreg
Apr 10 at 10:43
1
1
@egreg Yes, because
ltx@ifpackageloaded is a simple macro. If it would be, e.g., robust, it could be better to use LetLtxMacro from package letltxmacro. I didn't want to explain all this, so I've only noted about using newcommand* without arguments.– Schweinebacke
Apr 10 at 10:47
@egreg Yes, because
ltx@ifpackageloaded is a simple macro. If it would be, e.g., robust, it could be better to use LetLtxMacro from package letltxmacro. I didn't want to explain all this, so I've only noted about using newcommand* without arguments.– Schweinebacke
Apr 10 at 10:47
Thanks for the precisions
– lashoun
Apr 10 at 12:10
Thanks for the precisions
– lashoun
Apr 10 at 12:10
add a comment |
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3
You are missing the
makeatletterin your second example. And don't use the minimal class, normally it is too minimal.– Ulrike Fischer
Apr 10 at 9:52
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
Apr 10 at 9:53
It is said in the
ltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegindocumentthough.– lashoun
Apr 10 at 9:58
But even then it can only be used if you wrap it in
makeatletter...makeatotherbecause it has an@in its name.– moewe
Apr 10 at 9:59
Oooh, that's why! I'll try then.
– lashoun
Apr 10 at 10:00