Merge pull request #1028 from Skillmon/check-expanded

check whether expanded is a primitive
pgf-tikz · Jul 2, 2021 · afa8dcc · afa8dcc
2 parents e9c22dc + 1f6748b
commit afa8dcc
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/tex/generic/pgf/utilities/pgfkeys.code.tex b/tex/generic/pgf/utilities/pgfkeys.code.tex
@@ -55,6 +55,17 @@
   \let\pgfkeys@unexpanded \normalunexpanded
 \fi
 
+\begingroup
+  \edef\pgfkeys@tmpa{\string\expanded}
+  \edef\pgfkeys@tmpb{\meaning\pgfkeys@expanded}
+  \expandafter
+\endgroup
+\ifx\pgfkeys@tmpa\pgfkeys@tmpb
+\else
+  \pgfkeys@error{PGF requires the \noexpand\expanded primitive}
+  \csname @@end\expandafter\endcsname\expandafter\end%
+\fi
+
 
 % Set a key to a value
 %