Latex3 replacement for afterassigment in parsing code to grab integer
When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:
newcountmycount
defmycommand#1{mycommand@#1nil}
defmycommand@{afterassignmentmycommand@@mycount=}
defmycommand@@#1nil{integer: "themycount", rest: "#1"}
so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like
column 10 to 12 row 3 to 5
column 10 row 7
row 3 to 5
Is there a sanctioned latex3 approach to this?
latex3 parsing
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
add a comment |
When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:
newcountmycount
defmycommand#1{mycommand@#1nil}
defmycommand@{afterassignmentmycommand@@mycount=}
defmycommand@@#1nil{integer: "themycount", rest: "#1"}
so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like
column 10 to 12 row 3 to 5
column 10 row 7
row 3 to 5
Is there a sanctioned latex3 approach to this?
latex3 parsing
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
Why not just use delimited arguments?defgrab column#1to#2row#3to#4endgrab{...}
– Henri Menke
Jan 15 at 2:28
I edited it to include some cases where it the format isn't exactly the same, so that I don't know exactly what token follows the number.
– Hood Chatham
Jan 15 at 5:05
1
The answer is going to be 'no' or at least 'not at the moment': we've not come across a place where such an interface is required.
– Joseph Wright♦
Jan 15 at 9:07
add a comment |
When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:
newcountmycount
defmycommand#1{mycommand@#1nil}
defmycommand@{afterassignmentmycommand@@mycount=}
defmycommand@@#1nil{integer: "themycount", rest: "#1"}
so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like
column 10 to 12 row 3 to 5
column 10 row 7
row 3 to 5
Is there a sanctioned latex3 approach to this?
latex3 parsing
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and afterassignment. So the code looks like:
newcountmycount
defmycommand#1{mycommand@#1nil}
defmycommand@{afterassignmentmycommand@@mycount=}
defmycommand@@#1nil{integer: "themycount", rest: "#1"}
so then mycommand{12 and text} produces integer: "12", rest: "and text". For an example of why I would want to do this, see my answer here: https://tex.stackexchange.com/a/470171/23866. The asker wanted a command that takes as argument a specification like
column 10 to 12 row 3 to 5
column 10 row 7
row 3 to 5
Is there a sanctioned latex3 approach to this?
latex3 parsing
latex3 parsing
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
edited Jan 15 at 5:03
Hood Chatham
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
asked Jan 15 at 1:56
Hood ChathamHood Chatham
4,2841428
4,2841428
Why not just use delimited arguments?defgrab column#1to#2row#3to#4endgrab{...}
– Henri Menke
Jan 15 at 2:28
I edited it to include some cases where it the format isn't exactly the same, so that I don't know exactly what token follows the number.
– Hood Chatham
Jan 15 at 5:05
1
The answer is going to be 'no' or at least 'not at the moment': we've not come across a place where such an interface is required.
– Joseph Wright♦
Jan 15 at 9:07
add a comment |
Why not just use delimited arguments?defgrab column#1to#2row#3to#4endgrab{...}
– Henri Menke
Jan 15 at 2:28
I edited it to include some cases where it the format isn't exactly the same, so that I don't know exactly what token follows the number.
– Hood Chatham
Jan 15 at 5:05
1
The answer is going to be 'no' or at least 'not at the moment': we've not come across a place where such an interface is required.
– Joseph Wright♦
Jan 15 at 9:07
Why not just use delimited arguments?
defgrab column#1to#2row#3to#4endgrab{...}– Henri Menke
Jan 15 at 2:28
Why not just use delimited arguments?
defgrab column#1to#2row#3to#4endgrab{...}– Henri Menke
Jan 15 at 2:28
I edited it to include some cases where it the format isn't exactly the same, so that I don't know exactly what token follows the number.
– Hood Chatham
Jan 15 at 5:05
I edited it to include some cases where it the format isn't exactly the same, so that I don't know exactly what token follows the number.
– Hood Chatham
Jan 15 at 5:05
1
1
The answer is going to be 'no' or at least 'not at the moment': we've not come across a place where such an interface is required.
– Joseph Wright♦
Jan 15 at 9:07
The answer is going to be 'no' or at least 'not at the moment': we've not come across a place where such an interface is required.
– Joseph Wright♦
Jan 15 at 9:07
add a comment |
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Why not just use delimited arguments?
defgrab column#1to#2row#3to#4endgrab{...}– Henri Menke
Jan 15 at 2:28
I edited it to include some cases where it the format isn't exactly the same, so that I don't know exactly what token follows the number.
– Hood Chatham
Jan 15 at 5:05
1
The answer is going to be 'no' or at least 'not at the moment': we've not come across a place where such an interface is required.
– Joseph Wright♦
Jan 15 at 9:07