Process LaTeX code only if package is loaded
4
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.
documentclass{article}
usepackage[utf8]{inputenc}
makeatletter
newcommand{IfPackageLoaded}[3]{@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
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 IfPackageLoaded{natbib}{natbib 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
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
begin{document}
ltx@ifpackageloaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloaded{natbib}{natbib loaded}{natbib 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 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
4
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.
documentclass{article}
usepackage[utf8]{inputenc}
makeatletter
newcommand{IfPackageLoaded}[3]{@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
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 IfPackageLoaded{natbib}{natbib 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
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
begin{document}
ltx@ifpackageloaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloaded{natbib}{natbib loaded}{natbib 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 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
You are missing themakeatletterin your second example. And don't use the minimal class, normally it is too minimal.
– Ulrike Fischer
2 days ago
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
2 days ago
It is said in theltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegin{document}though.
– lashoun
2 days ago
But even then it can only be used if you wrap it inmakeatletter...makeatotherbecause it has an@in its name.
– moewe
2 days ago
Oooh, that's why! I'll try then.
– lashoun
2 days ago
add a comment |
4
4
4
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.
documentclass{article}
usepackage[utf8]{inputenc}
makeatletter
newcommand{IfPackageLoaded}[3]{@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
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 IfPackageLoaded{natbib}{natbib 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
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
begin{document}
ltx@ifpackageloaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloaded{natbib}{natbib loaded}{natbib 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 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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.
documentclass{article}
usepackage[utf8]{inputenc}
makeatletter
newcommand{IfPackageLoaded}[3]{@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
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 IfPackageLoaded{natbib}{natbib 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
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
begin{document}
ltx@ifpackageloaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
I get this error message:
! Undefined control sequence.
l.11 ltx
@ifpackageloaded{natbib}{natbib loaded}{natbib 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 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
lashoun
asked 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 days ago
lashounlashoun
615
asked 2 days ago
lashounlashoun
615
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
You are missing themakeatletterin your second example. And don't use the minimal class, normally it is too minimal.
– Ulrike Fischer
2 days ago
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
2 days ago
It is said in theltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegin{document}though.
– lashoun
2 days ago
But even then it can only be used if you wrap it inmakeatletter...makeatotherbecause it has an@in its name.
– moewe
2 days ago
Oooh, that's why! I'll try then.
– lashoun
2 days ago
add a comment |
2
You are missing themakeatletterin your second example. And don't use the minimal class, normally it is too minimal.
– Ulrike Fischer
2 days ago
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
2 days ago
It is said in theltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegin{document}though.
– lashoun
2 days ago
But even then it can only be used if you wrap it inmakeatletter...makeatotherbecause it has an@in its name.
– moewe
2 days ago
Oooh, that's why! I'll try then.
– lashoun
2 days ago
2
2
You are missing the
makeatletter in your second example. And don't use the minimal class, normally it is too minimal.– Ulrike Fischer
2 days ago
You are missing the
makeatletter in your second example. And don't use the minimal class, normally it is too minimal.– Ulrike Fischer
2 days ago
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
2 days ago
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
2 days ago
It is said in the
ltxcmds documentation that ltx@ifpackageloaded can be used after begin{document} though.– lashoun
2 days ago
It is said in the
ltxcmds documentation that ltx@ifpackageloaded can be used after begin{document} though.– lashoun
2 days ago
But even then it can only be used if you wrap it in
makeatletter...makeatother because it has an @ in its name.– moewe
2 days ago
But even then it can only be used if you wrap it in
makeatletter...makeatother because it has an @ in its name.– moewe
2 days ago
Oooh, that's why! I'll try then.
– lashoun
2 days ago
Oooh, that's why! I'll try then.
– lashoun
2 days ago
add a comment |
1 Answer
1
active
oldest
votes
4
As users Ulrike Fischer and moewe pointed out, this works:
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
makeatletter
newcommand{IfPackageLoaded}[3]{ltx@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
edited 2 days ago
Schweinebacke
22.6k4577
answered 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
BTW: The[3]is not needed. You can simply usenewcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.
– Schweinebacke
2 days ago
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
2 days ago
@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
2 days ago
Thanks for the precisions
– lashoun
2 days ago
add a comment |
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4
As users Ulrike Fischer and moewe pointed out, this works:
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
makeatletter
newcommand{IfPackageLoaded}[3]{ltx@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
edited 2 days ago
Schweinebacke
22.6k4577
answered 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
BTW: The[3]is not needed. You can simply usenewcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.
– Schweinebacke
2 days ago
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
2 days ago
@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
2 days ago
Thanks for the precisions
– lashoun
2 days ago
add a comment |
4
As users Ulrike Fischer and moewe pointed out, this works:
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
makeatletter
newcommand{IfPackageLoaded}[3]{ltx@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
edited 2 days ago
Schweinebacke
22.6k4577
answered 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
BTW: The[3]is not needed. You can simply usenewcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.
– Schweinebacke
2 days ago
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
2 days ago
@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
2 days ago
Thanks for the precisions
– lashoun
2 days ago
add a comment |
4
4
4
As users Ulrike Fischer and moewe pointed out, this works:
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
makeatletter
newcommand{IfPackageLoaded}[3]{ltx@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
edited 2 days ago
Schweinebacke
22.6k4577
answered 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
As users Ulrike Fischer and moewe pointed out, this works:
documentclass{article}
usepackage[utf8]{inputenc}
usepackage{ltxcmds}
makeatletter
newcommand{IfPackageLoaded}[3]{ltx@ifpackageloaded{#1}{#2}{#3}}
makeatother
begin{document}
IfPackageLoaded{natbib}{natbib loaded}{natbib not loaded}
end{document}
edited 2 days ago
Schweinebacke
22.6k4577
answered 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 days ago
Schweinebacke
22.6k4577
edited 2 days ago
Schweinebacke
22.6k4577
edited 2 days ago
Schweinebacke
22.6k4577
22.6k4577
answered 2 days ago
lashounlashoun
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 2 days ago
lashounlashoun
615
answered 2 days ago
lashounlashoun
615
615
New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
lashoun is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
BTW: The[3]is not needed. You can simply usenewcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.
– Schweinebacke
2 days ago
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
2 days ago
@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
2 days ago
Thanks for the precisions
– lashoun
2 days ago
add a comment |
2
BTW: The[3]is not needed. You can simply usenewcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.
– Schweinebacke
2 days ago
@Schweinebacke RIght; alsoletIfPackageLoadedltx@ifpackageloaded
– egreg
2 days ago
@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
2 days ago
Thanks for the precisions
– lashoun
2 days ago
2
2
BTW: The
[3] is not needed. You can simply use newcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.– Schweinebacke
2 days ago
BTW: The
[3] is not needed. You can simply use newcommand*{IfPackageLoaded}{ltx@ifpackageloaded}.– Schweinebacke
2 days ago
@Schweinebacke RIght; also
letIfPackageLoadedltx@ifpackageloaded– egreg
2 days ago
@Schweinebacke RIght; also
letIfPackageLoadedltx@ifpackageloaded– egreg
2 days ago
@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
2 days ago
@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
2 days ago
Thanks for the precisions
– lashoun
2 days ago
Thanks for the precisions
– lashoun
2 days ago
add a comment |
lashoun is a new contributor. Be nice, and check out our Code of Conduct.
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2
You are missing the
makeatletterin your second example. And don't use the minimal class, normally it is too minimal.– Ulrike Fischer
2 days ago
Read more: tex.stackexchange.com/q/8351/156344
– JouleV
2 days ago
It is said in the
ltxcmdsdocumentation thatltx@ifpackageloadedcan be used afterbegin{document}though.– lashoun
2 days ago
But even then it can only be used if you wrap it in
makeatletter...makeatotherbecause it has an@in its name.– moewe
2 days ago
Oooh, that's why! I'll try then.
– lashoun
2 days ago