Consider the output
of this MWE:
\documentclass{book}\usepackage{amsthm}\usepackage{thmtools}\usepackage{suffix}\declaretheorem[numberwithin=chapter, style=plain,name=Theorem,refname={theorem,theorems},Refname={Theorem,Theorems}]{theorem}\begin{document}\chapter{Test Chapter}\begin{restatable}[Made-Up Theorem]{theorem}{MadeUpTheorem} This is a made-up theorem.\end{restatable}Now, let's repeat the restatable theorem:\MadeUpTheorem*Next, let's try to define a new command if it has not yet been defined.\WithSuffix\providecommand\MadeUpTheorem*{ABC}Let's see what happens:\MadeUpTheorem*\textbf{Why does this output ABC? Why not the original theorem?}I thought providecommand only defined a command if it had not already been defined.\end{document}- (Optional) Q: Why does this output ABC? Why does it not again output the original made-up theorem?
- Q: More importantly, how can I "redefine"
\MadeUpTheorem*only if it has not been defined previously?
It seems that \providecommand overwrites the original definition of \MadeUpTheorem* even if it's already defined.
In my use-case, the original restatable will be in a different file than the calling of \MadeUpTheorem*. It is compiled using \include, but during intermediate compilations it is not included, hence not defined. But during the final compilation, it is included, and so "ABC" should not be printed.