12 lines
305 B
TeX
12 lines
305 B
TeX
\def\prepend#1#2{% #1=string #2=macro containing a string
|
|
\def\tempstring{#1}%
|
|
\expandafter\expandafter\expandafter
|
|
\def\expandafter\expandafter\expandafter
|
|
#2\expandafter\expandafter\expandafter
|
|
{\expandafter\tempstring#2}%
|
|
}
|
|
\def\mystring{world!}
|
|
\prepend{Hello }\mystring
|
|
Result : \mystring
|
|
\bye
|