To be or not to be - Optional arguments inside defination of macro
The version A part in the following example is to define header/footer by macros from package fancyhdr.
Though this version is workable, it's a awkward achievement because the same part of code(ifnum...) is written twice.
Except the optional argument #2, all other code is exactly the same. To improve it, I tried the version B below, but it does not work at all.
It will be awfull especially when the same part of code is large.
So, to sumarize, is there a better way of handling optional arguments (to be there or not) to avoid heavy duplicate code.
documentclass{article}
usepackage{geometry,fancyhdr,xparse}
geometry{showframe}
begin{document}
pagestyle{fancy}
fancyhf{}
%Version A: workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpage}{momm}{%
IfNoValueTF{#2}
{#1{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
{#1[#2]% the only diferrence between the two branches of IfNoValueTF is, whether introducing the optional argument #2
{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
}%firstpage
% Test
firstpage{fancyhead}[c]{only at the first page}{at rest pages}
firstpage{rhead}{r first}{r rest}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Version B: not workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpageA}{momm}{%
#1 IfNoValueTF{#2}{}{[#2]}
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}%firstpageA
% Test
firstpageA{fancyhead}[c]{only at the first page}{at rest pages}
firstpageA{rhead}{r first}{r rest}
fancyhdr xparse
asked 13 mins ago
lyllyl
64128
add a comment |
The version A part in the following example is to define header/footer by macros from package fancyhdr.
Though this version is workable, it's a awkward achievement because the same part of code(ifnum...) is written twice.
Except the optional argument #2, all other code is exactly the same. To improve it, I tried the version B below, but it does not work at all.
It will be awfull especially when the same part of code is large.
So, to sumarize, is there a better way of handling optional arguments (to be there or not) to avoid heavy duplicate code.
documentclass{article}
usepackage{geometry,fancyhdr,xparse}
geometry{showframe}
begin{document}
pagestyle{fancy}
fancyhf{}
%Version A: workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpage}{momm}{%
IfNoValueTF{#2}
{#1{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
{#1[#2]% the only diferrence between the two branches of IfNoValueTF is, whether introducing the optional argument #2
{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
}%firstpage
% Test
firstpage{fancyhead}[c]{only at the first page}{at rest pages}
firstpage{rhead}{r first}{r rest}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Version B: not workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpageA}{momm}{%
#1 IfNoValueTF{#2}{}{[#2]}
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}%firstpageA
% Test
firstpageA{fancyhead}[c]{only at the first page}{at rest pages}
firstpageA{rhead}{r first}{r rest}
fancyhdr xparse
asked 13 mins ago
lyllyl
64128
add a comment |
The version A part in the following example is to define header/footer by macros from package fancyhdr.
Though this version is workable, it's a awkward achievement because the same part of code(ifnum...) is written twice.
Except the optional argument #2, all other code is exactly the same. To improve it, I tried the version B below, but it does not work at all.
It will be awfull especially when the same part of code is large.
So, to sumarize, is there a better way of handling optional arguments (to be there or not) to avoid heavy duplicate code.
documentclass{article}
usepackage{geometry,fancyhdr,xparse}
geometry{showframe}
begin{document}
pagestyle{fancy}
fancyhf{}
%Version A: workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpage}{momm}{%
IfNoValueTF{#2}
{#1{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
{#1[#2]% the only diferrence between the two branches of IfNoValueTF is, whether introducing the optional argument #2
{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
}%firstpage
% Test
firstpage{fancyhead}[c]{only at the first page}{at rest pages}
firstpage{rhead}{r first}{r rest}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Version B: not workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpageA}{momm}{%
#1 IfNoValueTF{#2}{}{[#2]}
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}%firstpageA
% Test
firstpageA{fancyhead}[c]{only at the first page}{at rest pages}
firstpageA{rhead}{r first}{r rest}
fancyhdr xparse
asked 13 mins ago
lyllyl
64128
The version A part in the following example is to define header/footer by macros from package fancyhdr.
Though this version is workable, it's a awkward achievement because the same part of code(ifnum...) is written twice.
Except the optional argument #2, all other code is exactly the same. To improve it, I tried the version B below, but it does not work at all.
It will be awfull especially when the same part of code is large.
So, to sumarize, is there a better way of handling optional arguments (to be there or not) to avoid heavy duplicate code.
documentclass{article}
usepackage{geometry,fancyhdr,xparse}
geometry{showframe}
begin{document}
pagestyle{fancy}
fancyhf{}
%Version A: workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpage}{momm}{%
IfNoValueTF{#2}
{#1{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
{#1[#2]% the only diferrence between the two branches of IfNoValueTF is, whether introducing the optional argument #2
{%
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}
}
}%firstpage
% Test
firstpage{fancyhead}[c]{only at the first page}{at rest pages}
firstpage{rhead}{r first}{r rest}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Version B: not workable %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
NewDocumentCommand{firstpageA}{momm}{%
#1 IfNoValueTF{#2}{}{[#2]}
ifnumvalue{page}=1
#3% content of header/footer only at the first page
else
#4% content of header/footer at the rest pages
fi
}%firstpageA
% Test
firstpageA{fancyhead}[c]{only at the first page}{at rest pages}
firstpageA{rhead}{r first}{r rest}
fancyhdr xparse
fancyhdr xparse
asked 13 mins ago
lyllyl
64128
asked 13 mins ago
lyllyl
64128
edited 2 mins ago
lyl
asked 13 mins ago
lyllyl
64128
asked 13 mins ago
lyllyl
64128
asked 13 mins ago
lyllyl
64128
64128
add a comment |
add a comment |
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