https://github.com/gfngfn/expandparams

(La)TeX packages that makes you save the cost of writing thousands of \expandafter.
https://github.com/gfngfn/expandparams

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(La)TeX packages that makes you save the cost of writing thousands of \expandafter.

• Host: GitHub
• URL: https://github.com/gfngfn/expandparams
• Owner: gfngfn
• Created: 2014-10-05T12:05:41.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2014-10-17T09:32:34.000Z (about 10 years ago)
• Last Synced: 2024-10-19T01:05:50.335Z (2 months ago)
• Topics: latex, latex-package, tex
• Language: TeX
• Homepage:
• Size: 406 KB
• Stars: 4
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# expandparams

`expandparams` is a (La)TeX package that controls the expansion of token list with ease.

By using the commands `\expandparams` and `\prexp` in this package

you can save the cost of writing thousands of `\expandafter`. 

For example, let `\csone` and `\cstwo` be defined by below:

    \makeatletter

    \def\csone{GF}%

    \def\cstwo{\csone N}%

    \def\separatetokens#1#2#3{%

      \@tfor\ch:=#1\do{[\ch]}%

      \@tfor\ch:=#2\do{(\ch)}%

      \@tfor\ch:=#3\do{\{\ch\}%

    }%

Here, ordinary spec of `\separatetokens` is like

    \separatetokens{AB}{PQRS}{XYZ}\par

      % => [A][B](P)(Q)(R)(S){X}{Y}{Z}

    \separatetokens{AB}{\cstwo}{\csone}\par

      % => [A][B](GFN){GF}

However, sometimes we need to expand parameters before the main control sequence is expanded.

When you want to expand `\csone` once before `\separatetokens` is expanded,

you can write

    \expandparams{\separatetokens{AB}{\cstwo}\prexp{\cstwo}}\par

      % => [A][B](GFN){G}{F}

instead of writing

    \expandafter\separatetokens

      \expandafter{\expandafter A\expandafter B\expandafter}%

      \expandafter{\expandafter\cstwo\expandafter}%

      \expandafter{\csone}\par

by using enormous `\expandafter`s. Similarly, you can write

    \expandparams{\separatetokens{AB}\prexp{\cstwo}\prexp{\csone}}\par

      % => [A][B](GF)(N){G}{F}

instead of

    \expandafter\expandafter\expandafter\separatetokens

      \expandafter\expandafter\expandafter{%

        \expandafter\expandafter\expandafter A%

        \expandafter\expandafter\expandafter B%

      \expandafter\expandafter\expandafter}%

      \expandafter\expandafter\expandafter

      {\expandafter\cstwo\expandafter}\expandafter{\csone}\par

 

for expanding both `\csone` and `\cstwo` once. And you can also write

    \expandparams{\separatetokens{AB}\prexp\prexp{\cstwo}{\csone}}\par

      % => [A][B](G)(F)(N){GF}

instead of

    \expandafter\expandafter\expandafter\separatetokens

      \expandafter\expandafter\expandafter{%

      	\expandafter\expandafter\expandafter A%

      	\expandafter\expandafter\expandafter B%

      \expandafter\expandafter\expandafter}%

      \expandafter\expandafter\expandafter{\cstwo}{\csone}\par

for expanding `\cstwo` *twice*.