错误二:
error:must be after `@defmac' to use `@defmacx'
解决办法:
解决方法:
@macro ovar{varname}
@r{[}@var{\varname\}@r{]}@c
@end macro
@c @dvar(ARG, DEFAULT)
@c -------------------
@c The ARG is an optional argument, defaulting to DEFAULT. To be used
@c for macro arguments in their documentation (@defmac).
@macro dvar{varname, default}
@r{[}@var{\varname\} = @samp{\default\}@r{]}@c
@end macro
将红色行最后边的@c去掉