Comparing the "job name"

The token \jobname amusingly produces a sequence of characters whose category code is 12 (“other”), regardless of what the characters actually are. Since one inevitably has to compare a macro with the contents of another macro (using \ifx, somewhere) one needs to create a macro whose expansion looks the same as the expansion of \jobname. We find we can do this with \meaning, if we strip the “\show command” prefix.

The full command looks like: <!– {% raw %} –

>

snippet.latex

\def\StripPrefix#1>{}
\def\jobis#1{FF\fi
\def\predicate{#1}%
\edef\predicate{\expandafter\StripPrefix\meaning\predicate}%
\edef\job{\jobname}%
\ifx\job\predicate
}