7 lines
146 B
TeX
7 lines
146 B
TeX
\def\addtomacro#1#2{\expandafter\def\expandafter#1\expandafter{#1#2}}
|
|
\def\foo{Hello}
|
|
Initial: \foo
|
|
|
|
\addtomacro\foo{ world!}
|
|
Appended: \foo
|
|
\bye
|