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Looping over characters in a string and applying a macro with an additional argument
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The following code was kindly provided for me in TeX Chat by @egreg.
This LaTeX 3 code loops over a list of characters, and puts a box around each character. It does not skip whitespace
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{m}
{
tl_set:Nn l_tmpa_tl { #1 }
tl_replace_all:Nnn l_tmpa_tl { ~ } { c_space_tl }
tl_map_function:NN l_tmpa_tl boxedchar
}
ExplSyntaxOff
NewDocumentCommand{boxedchar}{m}{%
framebox[2em]{strut#1}%
}
begin{document}
spacechars{ab c d}
end{document}
I'd like an enhancement of this code, with a variation of spacechars which allows one to include a width argument that can then be passed to framebox.
But it does not look like tl_map_function will do the job, unless there is some way to pass it a macro which is a version of boxedchar where the width argument has been applied (i.e. as in partial function application).
I looked at the functions in the LaTeX 3 interface document, (which is
/usr/share/texlive/texmf-dist/doc/latex/l3kernel/interface3.pdf on my system), but didn't see anything that looked like it fit the bill.
macros latex3
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
add a comment |
The following code was kindly provided for me in TeX Chat by @egreg.
This LaTeX 3 code loops over a list of characters, and puts a box around each character. It does not skip whitespace
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{m}
{
tl_set:Nn l_tmpa_tl { #1 }
tl_replace_all:Nnn l_tmpa_tl { ~ } { c_space_tl }
tl_map_function:NN l_tmpa_tl boxedchar
}
ExplSyntaxOff
NewDocumentCommand{boxedchar}{m}{%
framebox[2em]{strut#1}%
}
begin{document}
spacechars{ab c d}
end{document}
I'd like an enhancement of this code, with a variation of spacechars which allows one to include a width argument that can then be passed to framebox.
But it does not look like tl_map_function will do the job, unless there is some way to pass it a macro which is a version of boxedchar where the width argument has been applied (i.e. as in partial function application).
I looked at the functions in the LaTeX 3 interface document, (which is
/usr/share/texlive/texmf-dist/doc/latex/l3kernel/interface3.pdf on my system), but didn't see anything that looked like it fit the bill.
macros latex3
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
add a comment |
The following code was kindly provided for me in TeX Chat by @egreg.
This LaTeX 3 code loops over a list of characters, and puts a box around each character. It does not skip whitespace
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{m}
{
tl_set:Nn l_tmpa_tl { #1 }
tl_replace_all:Nnn l_tmpa_tl { ~ } { c_space_tl }
tl_map_function:NN l_tmpa_tl boxedchar
}
ExplSyntaxOff
NewDocumentCommand{boxedchar}{m}{%
framebox[2em]{strut#1}%
}
begin{document}
spacechars{ab c d}
end{document}
I'd like an enhancement of this code, with a variation of spacechars which allows one to include a width argument that can then be passed to framebox.
But it does not look like tl_map_function will do the job, unless there is some way to pass it a macro which is a version of boxedchar where the width argument has been applied (i.e. as in partial function application).
I looked at the functions in the LaTeX 3 interface document, (which is
/usr/share/texlive/texmf-dist/doc/latex/l3kernel/interface3.pdf on my system), but didn't see anything that looked like it fit the bill.
macros latex3
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
The following code was kindly provided for me in TeX Chat by @egreg.
This LaTeX 3 code loops over a list of characters, and puts a box around each character. It does not skip whitespace
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{m}
{
tl_set:Nn l_tmpa_tl { #1 }
tl_replace_all:Nnn l_tmpa_tl { ~ } { c_space_tl }
tl_map_function:NN l_tmpa_tl boxedchar
}
ExplSyntaxOff
NewDocumentCommand{boxedchar}{m}{%
framebox[2em]{strut#1}%
}
begin{document}
spacechars{ab c d}
end{document}
I'd like an enhancement of this code, with a variation of spacechars which allows one to include a width argument that can then be passed to framebox.
But it does not look like tl_map_function will do the job, unless there is some way to pass it a macro which is a version of boxedchar where the width argument has been applied (i.e. as in partial function application).
I looked at the functions in the LaTeX 3 interface document, (which is
/usr/share/texlive/texmf-dist/doc/latex/l3kernel/interface3.pdf on my system), but didn't see anything that looked like it fit the bill.
macros latex3
macros latex3
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
asked 1 hour ago
Faheem MithaFaheem Mitha
3,34153964
3,34153964
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You can do it easily. ;-)
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{O{1em}m}
{
faheem_spacechars:nn { #1 } { #2 }
}
NewDocumentCommand{boxedchar}{O{1em}m}
{
faheem_spacechars_box:nn { #1 } { #2 }
}
tl_new:N l__faheem_spacechars_tl
tl_new:N l__faheem_spacechars_char_tl
cs_new_protected:Nn faheem_spacechars:nn
{
tl_set:Nn l__faheem_spacechars_tl { #2 }
tl_replace_all:Nnn l__faheem_spacechars_tl { ~ } { c_space_tl }
tl_map_variable:NNn l__faheem_spacechars_tl l__faheem_spacechars_char_tl
{ faheem_spacechars_box:nV { #1 } l__faheem_spacechars_char_tl }
}
cs_new_protected:Nn faheem_spacechars_box:nn
{
framebox[#1]{strut #2}
}
cs_generate_variant:Nn faheem_spacechars_box:nn { nV }
ExplSyntaxOff
begin{document}
spacechars{ab c d}
spacechars[2em]{ab c d}
end{document}
The trick is tl_map_variable:NNn.
answered 58 mins ago
egregegreg
737k8919373265
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can do it easily. ;-)
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{O{1em}m}
{
faheem_spacechars:nn { #1 } { #2 }
}
NewDocumentCommand{boxedchar}{O{1em}m}
{
faheem_spacechars_box:nn { #1 } { #2 }
}
tl_new:N l__faheem_spacechars_tl
tl_new:N l__faheem_spacechars_char_tl
cs_new_protected:Nn faheem_spacechars:nn
{
tl_set:Nn l__faheem_spacechars_tl { #2 }
tl_replace_all:Nnn l__faheem_spacechars_tl { ~ } { c_space_tl }
tl_map_variable:NNn l__faheem_spacechars_tl l__faheem_spacechars_char_tl
{ faheem_spacechars_box:nV { #1 } l__faheem_spacechars_char_tl }
}
cs_new_protected:Nn faheem_spacechars_box:nn
{
framebox[#1]{strut #2}
}
cs_generate_variant:Nn faheem_spacechars_box:nn { nV }
ExplSyntaxOff
begin{document}
spacechars{ab c d}
spacechars[2em]{ab c d}
end{document}
The trick is tl_map_variable:NNn.
answered 58 mins ago
egregegreg
737k8919373265
add a comment |
You can do it easily. ;-)
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{O{1em}m}
{
faheem_spacechars:nn { #1 } { #2 }
}
NewDocumentCommand{boxedchar}{O{1em}m}
{
faheem_spacechars_box:nn { #1 } { #2 }
}
tl_new:N l__faheem_spacechars_tl
tl_new:N l__faheem_spacechars_char_tl
cs_new_protected:Nn faheem_spacechars:nn
{
tl_set:Nn l__faheem_spacechars_tl { #2 }
tl_replace_all:Nnn l__faheem_spacechars_tl { ~ } { c_space_tl }
tl_map_variable:NNn l__faheem_spacechars_tl l__faheem_spacechars_char_tl
{ faheem_spacechars_box:nV { #1 } l__faheem_spacechars_char_tl }
}
cs_new_protected:Nn faheem_spacechars_box:nn
{
framebox[#1]{strut #2}
}
cs_generate_variant:Nn faheem_spacechars_box:nn { nV }
ExplSyntaxOff
begin{document}
spacechars{ab c d}
spacechars[2em]{ab c d}
end{document}
The trick is tl_map_variable:NNn.
answered 58 mins ago
egregegreg
737k8919373265
add a comment |
You can do it easily. ;-)
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{O{1em}m}
{
faheem_spacechars:nn { #1 } { #2 }
}
NewDocumentCommand{boxedchar}{O{1em}m}
{
faheem_spacechars_box:nn { #1 } { #2 }
}
tl_new:N l__faheem_spacechars_tl
tl_new:N l__faheem_spacechars_char_tl
cs_new_protected:Nn faheem_spacechars:nn
{
tl_set:Nn l__faheem_spacechars_tl { #2 }
tl_replace_all:Nnn l__faheem_spacechars_tl { ~ } { c_space_tl }
tl_map_variable:NNn l__faheem_spacechars_tl l__faheem_spacechars_char_tl
{ faheem_spacechars_box:nV { #1 } l__faheem_spacechars_char_tl }
}
cs_new_protected:Nn faheem_spacechars_box:nn
{
framebox[#1]{strut #2}
}
cs_generate_variant:Nn faheem_spacechars_box:nn { nV }
ExplSyntaxOff
begin{document}
spacechars{ab c d}
spacechars[2em]{ab c d}
end{document}
The trick is tl_map_variable:NNn.
answered 58 mins ago
egregegreg
737k8919373265
You can do it easily. ;-)
documentclass[12pt]{article}
usepackage{xparse}
ExplSyntaxOn
NewDocumentCommand{spacechars}{O{1em}m}
{
faheem_spacechars:nn { #1 } { #2 }
}
NewDocumentCommand{boxedchar}{O{1em}m}
{
faheem_spacechars_box:nn { #1 } { #2 }
}
tl_new:N l__faheem_spacechars_tl
tl_new:N l__faheem_spacechars_char_tl
cs_new_protected:Nn faheem_spacechars:nn
{
tl_set:Nn l__faheem_spacechars_tl { #2 }
tl_replace_all:Nnn l__faheem_spacechars_tl { ~ } { c_space_tl }
tl_map_variable:NNn l__faheem_spacechars_tl l__faheem_spacechars_char_tl
{ faheem_spacechars_box:nV { #1 } l__faheem_spacechars_char_tl }
}
cs_new_protected:Nn faheem_spacechars_box:nn
{
framebox[#1]{strut #2}
}
cs_generate_variant:Nn faheem_spacechars_box:nn { nV }
ExplSyntaxOff
begin{document}
spacechars{ab c d}
spacechars[2em]{ab c d}
end{document}
The trick is tl_map_variable:NNn.
answered 58 mins ago
egregegreg
737k8919373265
answered 58 mins ago
egregegreg
737k8919373265
answered 58 mins ago
egregegreg
737k8919373265
answered 58 mins ago
egregegreg
737k8919373265
737k8919373265
add a comment |
add a comment |
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