dnl ######################################################################
dnl Set operations using shell
dnl ######################################################################
dnl
dnl This implements a set of set operations ('set' in the sense of
dnl 'set theory') as shell code for use at configure time.  At m4 time
dnl (aka autoreconf time), there already exists a set of m4_set_*
dnl macros, but we cannot use those for user specified and
dnl autodetected changes at configure time.
dnl
dnl Not all set operations are implemented, but a few basic ones we
dnl need for gp-camlibs.m4 are.
dnl
dnl   * Basic definitions:
dnl
dnl       * GP_SET_DEFINE
dnl       * GP_SET_UNDEFINE
dnl
dnl   * Operations on sets:
dnl
dnl       * GP_SET_ADD
dnl       * GP_SET_ADD_ALL
dnl       * GP_SET_REMOVE
dnl
dnl       * GP_SET_CARDINALITY
dnl       * GP_SET_DIFFERENCE
dnl       * GP_SET_UNION
dnl
dnl       * GP_SET_FOREACH
dnl
dnl   * Conditionals:
dnl
dnl       * GP_SET_CONTAINS_IFELSE
dnl       * GP_SET_EMPTY_IFELSE
dnl       * GP_SET_EQUAL_IFELSE
dnl
dnl       * GP_SET_CLEAN_FILES
dnl
dnl   * Internals and debugging help:
dnl
dnl       * GP_SET_CANONICALIZE
dnl       * GP_SET_DUMP_ALL
dnl       * GP_SET_TESTSUITE
dnl
dnl   * Fill shell variables with set contents:
dnl
dnl       * GP_SET_DEBUG_VAR
dnl       * GP_SET_SPACE_VAR
dnl
dnl   * Output AC_MSG_* for GP_SET_* sets:
dnl
dnl       * GP_SET_DEBUG_MSG
dnl       * GP_SET_MSG_DEBUG_RESULT
dnl
dnl       * GP_SET_SPACE_MSG
dnl       * GP_SET_MSG_SPACE_RESULT
dnl
dnl ######################################################################
dnl Remarks on usage and implementation of GP_SET_*
dnl
dnl   * Sets are stored in text files, one element per line. An empty
dnl     file is an empty set, and empty lines mean empty elements.
dnl     Non-empty files not ending with a newline are undefined behaviour.
dnl
dnl   * At this time, GP_SET_* functions work with set elements
dnl     consisting of a limited set of characters, but the storage
dnl     format allows for a future code cleanup to allow for handling
dnl     more arbitrarily called elements.
dnl
dnl   * Set names given to GP_SET_ macros must be defined at m4
dnl     (autoreconf) time, not at sh (configure) time.
dnl
dnl   * Every set must be declared before use with GP_SET_DEFINE so we
dnl     can create an empty file for them and keep track of the name of
dnl     that file for cleaning up later.
dnl
dnl   * Use GP_SET_CLEAN_FILES after your last set operations to remove
dnl     all left over set files.
dnl
dnl   * Set text files may contain set elements in any order, and in
dnl     any number. There is no difference between a set text file
dnl     containing the same line seven times and one which only contains
dnl     it one time.
dnl
dnl   * Some set operations work better or require on sorted files, so
dnl     sometimes the implementation sorts the set text files. If you
dnl     need a set text file sorted for some another reason, use
dnl     GP_SET_CANONICALIZE([set-name]).
dnl
dnl
dnl ######################################################################
dnl
dnl FIXME: Do we need to test ${COMM} works before using it?
dnl FIXME: Do we need a sh-based replacement for ${COMM} if it is not present?
dnl FIXME: Abort if _DIFFERENCE is called with ${COMM} not found/not working.
dnl FIXME: Do we need to stop using shell functions?
dnl
dnl
dnl ######################################################################
dnl Try catching unexpanded macros in the output.
dnl ######################################################################
m4_pattern_forbid([GP_SET_])dnl
m4_pattern_forbid([_GP_SET_])dnl
m4_pattern_allow([GP_SET_EOF])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_INIT
dnl   Called internally before any set operation.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_INIT], [dnl
AC_REQUIRE([AC_PROG_GREP])dnl
AC_REQUIRE([GP_PROG_COMM])dnl
AC_REQUIRE([GP_PROG_SORT])dnl
AC_REQUIRE([GP_PROG_UNIQ])dnl
m4_set_empty([gp_set_all_sets], [], [dnl
  m4_set_foreach([gp_set_all_sets], [elt], [dnl
    m4_errprintn(__file__: __line__:[ Set gp_set_all_sets contains element ]elt)dnl
  ])dnl
  m4_errprintn(__file__:__line__:[ Error: gp_set_all_sets already defined])dnl
  dnl m4_exit(1)dnl
])dnl
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_FILENAME([set_name])
dnl _GP_SET_FILENAME([set_name], [extra-extension])
dnl   Convert set name to set file name. If present, add the given
dnl   extra-extension to the file name in some position.
dnl ######################################################################
AC_DEFUN([_GP_SET_FILENAME], [dnl
[gp-set-file--][$1]m4_if([$2],[],[],[.$2])])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_CHECK_INIT
dnl   Implement the gp_set_shfn_check() shell function which checks that the
dnl   given set exists and is in general working order.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_CHECK_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
gp_set_shfn_check ()
{
  if test -f "[$]1"; then :; else
    AC_MSG_ERROR(["Error: set [$]1 has not been defined yet"])
  fi
} # gp_set_shfn_check
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_CHECK([set_name])
dnl   Check that the given set exists and is in general working order.
dnl   Works by calling the gp_set_shfn_check() shell function.
dnl ######################################################################
AC_DEFUN([_GP_SET_CHECK], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_CHECK_INIT])dnl
gp_set_shfn_check "_GP_SET_FILENAME([$1])"
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_DUMP_ALL
dnl   Dump all sets to stdout. Intended for helping with debugging.
dnl ######################################################################
AC_DEFUN([GP_SET_DUMP_ALL], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
for setfile in gp-set-file--*
do
  AS_ECHO(["Set file: ${setfile}"])
  ${SED} 's/^/  * <</; s/$/>>/' "${setfile}"
done
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_DEFINE([set_name])
dnl   Declare a set of given name, initializing it to an empty set.
dnl   Not a shell function, as the emitted shell code is shorter than
dnl   calling a shell function.
dnl ######################################################################
AC_DEFUN([GP_SET_DEFINE], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
m4_set_add([gp_set_all_sets], [$1])dnl
: > "_GP_SET_FILENAME([$1])"
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_UNDEFINE([set_name])
dnl   Undefine a set of given name, removing its file.
dnl   Not a shell function, as the emitted shell code is shorter than
dnl   calling a shell function.
dnl ######################################################################
AC_DEFUN([GP_SET_UNDEFINE], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
_GP_SET_CHECK([$1])dnl
rm -f "_GP_SET_FILENAME([$1])"
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_ADD_INIT
dnl   Implement the gp_set_shfn_set_add() shell function which adds a given
dnl   element to a given set.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_ADD_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_CHECK_INIT])dnl
gp_set_shfn_set_add ()
{
  gp_set_shfn_check "[$]1"
  AS_ECHO(["[$]2"]) >> "[$]1"
} # gp_set_shfn_set_add
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_ADD([set_name], [element])
dnl   Add the given element to the given set. Implemented by calling the
dnl   gp_set_shfn_set_add() shell function.
dnl   Note: Unlike m4_set_add, this does not handle IF-UNIQ and IF-DUP
dnl   macro parameters.
dnl ######################################################################
AC_DEFUN([GP_SET_ADD], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_ADD_INIT])dnl
gp_set_shfn_set_add "_GP_SET_FILENAME([$1])" "$2"
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_ADD_ALL([set_name], [element]...)
dnl   Add the given elements to the given set, similar to m4_set_add_all.
dnl   This can be very useful for initializing a GP_SET_* set from a
dnl   m4_set_* in one go.
dnl   Not a shell function, as the emitted shell code is shorter than
dnl   calling a shell function.
dnl ######################################################################
AC_DEFUN([GP_SET_ADD_ALL], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
_GP_SET_CHECK([$1])dnl
cat>>"_GP_SET_FILENAME([$1])"<<_GP_EOF
m4_foreach([myvar], [m4_shift($@)], [dnl
myvar
])dnl
_GP_EOF
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_REMOVE_INIT
dnl   Implement the gp_set_shfn_remove() shell function removing a given
dnl   element from a given set.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_REMOVE_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
gp_set_shfn_remove ()
{
  gp_set_shfn_check "[$]1"
  ${GREP} -v "^[$]2$" < "[$]1" > "[$]1.tmp"
  mv -f "[$]1.tmp" "[$]1"
} # gp_set_shfn_remove
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_REMOVE([set_name], [element])
dnl   Remove a given element from a given set.
dnl   Calls the gp_set_shfn_remove() shell function for the actual work.
dnl ######################################################################
AC_DEFUN([GP_SET_REMOVE], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_REMOVE_INIT])dnl
gp_set_shfn_remove "_GP_SET_FILENAME([$1])" "$2"
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_UNION_INIT
dnl   Define the gp_set_shfn_union() shell function which defines a
dnl   result set as the union of 0 or more sets.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_UNION_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
dnl This functions uses the shell builtin 'shift', so it needs to store
dnl the original $1 in a local variable.
gp_set_shfn_union ()
{
  local result_fname="[$]1"
  gp_set_shfn_check "[$]result_fname"
  if shift; then
    cat "[$]@" > "[$]{result_fname}.tmp"
    mv -f "[$]{result_fname}.tmp" "[$]{result_fname}"
  fi
} # gp_set_shfn_union
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_UNION([result_set], [setname]...)
dnl   Define result_set as the union of 0 or more setnames.
dnl   Calls the gp_set_shfn_union() shell function for the actual work.
dnl ######################################################################
AC_DEFUN([GP_SET_UNION], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_UNION_INIT])dnl
m4_set_add([gp_set_all_sets], [$1])dnl
gp_set_shfn_union m4_foreach([setname], [$@], [ "_GP_SET_FILENAME(setname)"])
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_DIFFERENCE_INIT([result_set_fname], [set_fname]...)
dnl   This uses comm(1), which is a POSIX command. We can always
dnl   re-implement comm(1) with a lot of speed penalties in a bunch
dnl   of nested sh loops if we run into a system which does not have
dnl   comm(1) installed.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_DIFFERENCE_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_CHECK_INIT])dnl
AC_REQUIRE([_GP_SET_CANONICALIZE_INIT])dnl
dnl This functions uses the shell builtin 'shift', so it needs to store
dnl the original $1 and $2 in local variables.
gp_set_shfn_difference ()
{
  local result_fname="[$]1"
  gp_set_shfn_check "[$]result_fname"
  if shift; then
    gp_set_shfn_canonicalize "[$]1"
    cat "[$]1" > "[$]result_fname"
    if shift; then
      for gp_s
      do
        gp_set_shfn_canonicalize "[$]gp_s"
        ${COMM} -23 "[$]{result_fname}" "[$]gp_s" > "[$]{result_fname}.tmp"
        mv -f "[$]{result_fname}.tmp" "[$]{result_fname}"
      done
    fi
  fi
} # gp_set_shfn_difference
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_DIFFERENCE([result_set], [setname]...)
dnl   Define result_set as the first setname with the element of all
dnl   the other sets removed from it.
dnl ######################################################################
AC_DEFUN([GP_SET_DIFFERENCE], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_DIFFERENCE_INIT])dnl
m4_set_add([gp_set_all_sets], [$1])dnl
gp_set_shfn_difference m4_foreach([setname], [$@], [ "_GP_SET_FILENAME(setname)"])
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_CARDINALITY_INIT
dnl   Define gp_set_shfn_cardinality() shell function which writes
dnl   set cardinality to stdout.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_CARDINALITY_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
gp_set_shfn_cardinality ()
{
  gp_set_shfn_check "[$]1"
  wc -l < "[$]1"
} # gp_set_shfn_cardinality
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_CARDINALITY([set_name])
dnl   Write set cardinality to stdout.
dnl ######################################################################
AC_DEFUN([GP_SET_CARDINALITY], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_CARDINALITY_INIT])dnl
gp_set_shfn_cardinality "_GP_SET_FILENAME([$1])"])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_EMPTY_IFELSE([set_name], [if-empty], [if-not-empty])
dnl   Run if-empty block or if-not-empty block, depending on whether
dnl   the named set is empty or not.
dnl ######################################################################
AC_DEFUN([GP_SET_EMPTY_IFELSE], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
_GP_SET_CHECK([$1])dnl
AS_IF([test "0" -eq "$(wc -l < "_GP_SET_FILENAME([$1])")"], m4_shift($@))
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_EQUAL_IFELSE([set_a], [set_b], [if-equal], [if-not-equal])
dnl   When set_a and set_b are equal, run the if-equal block. Otherwise,
dnl   run the if-not-equal block.
dnl ######################################################################
AC_DEFUN([GP_SET_EQUAL_IFELSE], [dnl
gp_set_shfn_canonicalize "_GP_SET_FILENAME([$1])"
gp_set_shfn_canonicalize "_GP_SET_FILENAME([$2])"
AS_IF([${CMP} "_GP_SET_FILENAME([$1])" "_GP_SET_FILENAME([$2])" > /dev/null 2>&1],
      m4_shift2($@))
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_CONTAINS_IFELSE([set_name], [element], [yes-block], [no-block])
dnl   If set_name contains element, run the yes-block. Otherwise,
dnl   run the no-block.
dnl ######################################################################
AC_DEFUN([GP_SET_CONTAINS_IFELSE], [dnl
_GP_SET_CHECK([$1])dnl
AS_IF([test "0" -lt "$(${GREP} -c "^$2\$" < "_GP_SET_FILENAME([$1])")"],
      m4_shift2($@))
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_DEBUG_VAR_INIT
dnl   Define gp_set_shfn_debug_var() shell function which sets a shell
dnl   variable to a string representing a human readable form for of
dnl   the given set.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_DEBUG_VAR_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
gp_set_shfn_debug_var ()
{
  gp_set_shfn_check "[$]1"
  gp_set_shfn_canonicalize "[$]1"
  local element
  local gp_set_is_first=:
  local gp_set_saved_ifs="$IFS"
  IFS=""
  while read element
  do
    if "$gp_set_is_first"
    then
      eval "[$]2=\"{ \""
      gp_set_is_first=false
    else
      eval "[$]2=\"\${[$]2}, \""
    fi
    if test "x$element" = "x"
    then
      eval "[$]2=\"\${[$]2}''\""
    else
      eval "[$]2=\"\${[$]2}'\$element'\""
    fi
  done < "[$]1"
  IFS="$gp_set_saved_ifs"
  if "$gp_set_is_first"
  then
    eval "[$]2=\"{ }\""
  else
    eval "[$]2=\"\${[$]2} }\""
  fi
} # gp_set_shfn_debug_var
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_DEBUG_VAR([set_name], [shell_var_name])
dnl   Set shell variable shell_var_name to a string representing a human
dnl   readable for of the given set.
dnl ######################################################################
AC_DEFUN([GP_SET_DEBUG_VAR], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_DEBUG_VAR_INIT])dnl
gp_set_shfn_debug_var "_GP_SET_FILENAME([$1])" "$2"
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_DEBUG_MSG([set-name])
dnl   For a given set, expand to a simple pair of AC_MSG_CHECKING and
dnl   AC_MSG_RESULT showing the GP_SET_DEBUG_VAR, mostly to help with
dnl   debugging.
dnl ######################################################################
AC_DEFUN([GP_SET_DEBUG_MSG], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_MSG_CHECKING([value of set ]$1)
GP_SET_MSG_DEBUG_RESULT([$1])
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_SPACE_MSG([set-name])
dnl   For a given set, expand to a simple pair of AC_MSG_CHECKING and
dnl   AC_MSG_RESULT showing the GP_SET_SPACE_VAR, both to help with
dnl   debugging gp-set.m4 and possibly for produnction use.
dnl ######################################################################
AC_DEFUN([GP_SET_MSG], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_MSG_CHECKING([value of set ]$1)
GP_SET_MSG_RESULT([$1])
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_SPACE_VAR([set-name], [var-name])
dnl ######################################################################
AC_DEFUN([GP_SET_SPACE_VAR], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
$2=""
GP_SET_FOREACH([$1], [element], [dnl
AS_IF([test "x[$]$2" = "x"], [dnl
  $2="[$]element"
], [dnl
  $2="[$]$2 [$]element"
])
])
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_MSG_RESULT([set-name])
dnl   Shortcut for setting a shell variable to a space separated list of
dnl   elements, and then expanding to AC_MSG_RESULT([$shellvar]).
dnl ######################################################################
AC_DEFUN([GP_SET_MSG_RESULT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
GP_SET_SPACE_VAR([$1], [gp_set_msg_result_var])dnl
AC_MSG_RESULT([${gp_set_msg_result_var}])
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_MSG_DEBUG_RESULT([set-name])
dnl   Shortcut for setting a shell variable to a human readable list of
dnl   elements, and then expanding to AC_MSG_RESULT([$shellvar]).
dnl ######################################################################
AC_DEFUN([GP_SET_MSG_DEBUG_RESULT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
GP_SET_DEBUG_VAR([$1], [gp_set_msg_result_var])dnl
AC_MSG_RESULT([${gp_set_msg_result_var}])
])dnl
dnl
dnl
dnl ######################################################################
dnl _GP_SET_CANONICALIZE_INIT
dnl   Implement the gp_set_shfn_canonicalize() shell function.
dnl ######################################################################
AC_DEFUN_ONCE([_GP_SET_CANONICALIZE_INIT], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
gp_set_shfn_canonicalize ()
{
  gp_set_shfn_check "[$]1"
  { set -e
    [$]{SORT} < "[$]1" | [$]{UNIQ} > "[$]1.tmp"
    mv -f "[$]1.tmp" "[$]1"; }
} # gp_set_shfn_canonicalize
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_CANONICALIZE([set_name])
dnl   Convert the set file for set_name into a canonical form.
dnl
dnl   Implementation detail: Sorts the lines, and makes them unique.
dnl ######################################################################
AC_DEFUN([GP_SET_CANONICALIZE], [dnl
AC_REQUIRE([_GP_SET_INIT])dnl
AC_REQUIRE([_GP_SET_CANONICALIZE_INIT])dnl
gp_set_shfn_canonicalize "_GP_SET_FILENAME([$1])"
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_FOREACH([set_name], [shell-var], [shell-block])
dnl   For each element in set_name, run the shell-block with the given
dnl   shell variable set to every element in turn.
dnl ######################################################################
AC_DEFUN([GP_SET_FOREACH], [dnl
_GP_SET_CHECK([$1])dnl
gp_set_saved_ifs="$IFS"
IFS=""
while read $2
do
  IFS="$gp_set_saved_ifs"
  $3
done < "_GP_SET_FILENAME([$1])"
IFS="$gp_set_saved_ifs"
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_CLEAN_FILES
dnl   Remove all the files used for storing sets. Invoke this macro near
dnl   the end of configure.ac after you have finished doing anything with
dnl   GP_SET_* sets.
dnl ######################################################################
AC_DEFUN([GP_SET_CLEAN_FILES], [dnl
AC_BEFORE([_GP_SET_INIT], [$0])dnl
AC_BEFORE([GP_SET_DEFINE], [$0])dnl
AC_BEFORE([GP_SET_UNDEFINE], [$0])dnl
AC_BEFORE([GP_SET_ADD], [$0])dnl
AC_BEFORE([GP_SET_ADD_ALL], [$0])dnl
AC_BEFORE([GP_SET_REMOVE], [$0])dnl
AC_BEFORE([GP_SET_EMPTY_IFELSE], [$0])dnl
AC_BEFORE([GP_SET_EQUAL_IFELSE], [$0])dnl
AC_BEFORE([GP_SET_CONTAINS_IFELSE], [$0])dnl
AC_BEFORE([GP_SET_DEBUG_VAR], [$0])dnl
AC_BEFORE([GP_SET_SPACE_VAR], [$0])dnl
dnl
dnl GP_SET_DUMP_ALL()dnl
dnl
dnl m4_set_foreach([gp_set_all_sets], [set_name], [dnl
dnl AS_ECHO(["Set defined somewhere: set_name"])
dnl ])dnl
dnl
[rm -f]m4_set_foreach([gp_set_all_sets], [setname],
                      [ "_GP_SET_FILENAME(setname)"])dnl
])dnl
dnl
dnl
dnl ######################################################################
dnl GP_SET_TESTSUITE()
dnl   Does a number of tests for the GP_SET_* macros.
dnl
dnl   Should be mostly useful while debugging gp-set.m4 itself.
dnl ######################################################################
AC_DEFUN([GP_SET_TESTSUITE], [dnl
# BEGIN $0
_GP_SET_INIT

GP_SET_DEFINE([foo])
GP_SET_DEFINE([bar])
GP_SET_DEFINE([foobar])
GP_SET_DEFINE([everything])

GP_SET_DEBUG_MSG([foo])

GP_SET_DEFINE([bax])
GP_SET_UNDEFINE([bax])

GP_SET_UNDEFINE([bar])
GP_SET_DEFINE([bar])

dnl GP_SET_ADD([moo], [meh])
GP_SET_ADD_ALL([everything], [foo], [bar], [bar ], [bla])

GP_SET_DUMP_ALL

m4_set_add_all([m4testset], [a], [b c], [d e], [f], [g])
AC_MSG_CHECKING([for value of m4 testset])
AC_MSG_RESULT([m4_set_contents([m4testset], [, ])])

GP_SET_ADD_ALL([everything]m4_set_listc([m4testset]))

GP_SET_DUMP_ALL

GP_SET_ADD([foo], [barfoo])
GP_SET_ADD([foo], [foobar])
GP_SET_ADD([foo], [fox])
GP_SET_ADD([foo], [fux])
GP_SET_ADD([foo], [fox])
GP_SET_ADD([foo], [])
GP_SET_ADD([foo], [fox])
GP_SET_ADD([foo], [barfoo])
GP_SET_ADD([foo], [ barfoo])
GP_SET_ADD([foo], ["barfoo "])
GP_SET_ADD([foo], [])
GP_SET_REMOVE([foo], [fox])
GP_SET_ADD([foo], [barfoo])

GP_SET_ADD([foobar], [bar])
GP_SET_ADD([foobar], [foobar])
GP_SET_ADD([foobar], [barfoo])

GP_SET_DEBUG_MSG([foo])

GP_SET_MSG([bar])
GP_SET_MSG([foo])
GP_SET_MSG([foobar])
GP_SET_MSG([everything])

GP_SET_DEFINE([union])
GP_SET_UNION([union], [foo], [bar], [foobar])
AC_MSG_CHECKING([value of union of foo bar foobar])
GP_SET_MSG_RESULT([union])

GP_SET_DEFINE([difference])
GP_SET_DIFFERENCE([difference], [foo], [bar], [foobar])
GP_SET_MSG([difference])

AC_MSG_CHECKING([whether sets foo and bar are equal])
GP_SET_EQUAL_IFELSE([foo], [bar], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([whether set foo is empty])
GP_SET_EMPTY_IFELSE([foo], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([whether set bar is empty])
GP_SET_EMPTY_IFELSE([bar], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([whether set foo contains element bar])
GP_SET_CONTAINS_IFELSE([foo], [bar], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])

AC_MSG_CHECKING([whether set foobar contains element bar])
GP_SET_CONTAINS_IFELSE([foobar], [bar], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no])])

GP_SET_FOREACH([foobar], [gp_set_var], [dnl
  AC_MSG_CHECKING([foobar element])
  AC_MSG_RESULT([${gp_set_var}])
])dnl
GP_SET_FOREACH([foobar], [gp_set_var], [dnl
  AS_ECHO(["  * element ${gp_set_var}"])
])dnl
GP_SET_FOREACH([foobar], [gp_set_var], [echo "  * ELEMENT ${gp_set_var}"])dnl
AS_ECHO(["Moo."])

GP_SET_DUMP_ALL
# END $0
])dnl
dnl
dnl
dnl ####################################################################
dnl
dnl Local Variables:
dnl mode: autoconf
dnl End: