\input texinfo   @c -*-texinfo-*-
@comment %**start of header
@setfilename macro_in_ifset.info

@macro macro1 {arg}
@end ifset
@end macro

@node Top
@top Top

@ifset a
@macro1
in ifset
@end ifset
 
@ifset a
@macro1{
@end ifset
}
in ifset
@end ifset

24 text

@bye
