divert(-1) # foreach(x, (item_1, item_2, ..., item_n), stmt) define(`foreach', `pushdef(`$1', `')_foreach(`$1', `$2', `$3')popdef(`$1')') define(`_arg1', `$1') define(`_foreach', `ifelse(`$2', `()', , `define(`$1', _arg1$2)$3`'_foreach(`$1', (shift$2), `$3')')') # traceon(`define', `foreach', `_foreach', `ifelse') divert foreach(`x', `(foo, bar, foobar)', `Word was: x ') # Something more complex, from Pierre Gaumond <gaumondp@ere.umontreal.ca>. define(`case', ` $1) $2=" -$1";; ')dnl define(`_cat', `$1$2')dnl `case' "$1" in foreach(`x', ((a, vara), (b, varb), (c, varc)), `_cat(`case', x)')dnl esac