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-rw-r--r--tex/context/base/core-var.tex13
1 files changed, 12 insertions, 1 deletions
diff --git a/tex/context/base/core-var.tex b/tex/context/base/core-var.tex
index eba38fdc5..4db5cb6e5 100644
--- a/tex/context/base/core-var.tex
+++ b/tex/context/base/core-var.tex
@@ -143,7 +143,7 @@
\def\dodopreventmode#1%
{\@EA\let\csname\@mode@#1\endcsname\preventedmode}
-\def\dodoenablemode#1%
+\def\dodoenablemode#1% mode can be relax
{\ifcase0\csname\@mode@#1\endcsname\relax
\@EA\let\csname\@mode@#1\endcsname\enabledmode
\fi}
@@ -153,6 +153,17 @@
\@EA\let\csname\@mode@#1\endcsname\disabledmode
\fi}
+% handy for mp
+
+\def\booleanmodevalue#1% can be \relax
+ {\expandafter\ifx\csname\@mode@#1\endcsname\relax
+ fals%
+ \else\ifnum0\csname\@mode@#1\endcsname=0
+ fals%
+ \else
+ tru%
+ \fi\fi e}
+
% check macros
\newif\ifcheckedmode