how to replace latex macros with their definitions (using latex)

Posted by RamyenHead on Stack Overflow See other posts from Stack Overflow or by RamyenHead
Published on 2009-10-02T14:17:38Z Indexed on 2010/04/27 14:23 UTC
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How can I replace all occurrence of user defined latex macros with their definitions?

For example, given this file

old.tex

\newcommand{\blah}[2]{#1 \to #2}
...
foo \blah{egg}{spam} bar
...

how to generate the file below in an automatic way

new.tex

...
foo egg \to spam bar
...

Instead of reimplementing latex macro logic with perl, can I use latex or tex engine itself to do this?

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