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list: Add remove_first and remove_last operations.
Suggested by Marc Nieper-Wißkirchen <marc.nieper+gnu@gmail.com> in
<https://lists.gnu.org/archive/html/bug-gnulib/2020-04/msg00092.html>.
* lib/gl_list.h (struct gl_list_implementation): Add fields
remove_first, remove_last.
(gl_list_remove_first, gl_list_remove_last): New functions.
* lib/gl_array_list.c (gl_array_remove_first, gl_array_remove_last): New
functions, based on gl_array_remove_at.
(gl_array_list_implementation): Implement the new operations.
* lib/gl_carray_list.c (gl_carray_remove_first, gl_carray_remove_last):
New functions, based on gl_carray_remove_at.
(gl_carray_list_implementation): Implement the new operations.
* lib/gl_anylinked_list2.h (gl_linked_remove_first,
gl_linked_remove_last): New functions, based on gl_linked_remove_at.
* lib/gl_linked_list.c (gl_linked_list_implementation): Implement the
new operations.
* lib/gl_linkedhash_list.c (gl_linkedhash_list_implementation):
Likewise.
* lib/gl_anytree_list2.h (gl_tree_remove_first, gl_tree_remove_last):
New functions, based on gl_tree_remove_at.
* lib/gl_avltree_list.c (gl_avltree_list_implementation): Implement the
new operations.
* lib/gl_avltreehash_list.c (gl_avltreehash_list_implementation):
Likewise.
* lib/gl_rbtree_list.c (gl_rbtree_list_implementation): Likewise.
* lib/gl_rbtreehash_list.c (gl_rbtreehash_list_implementation):
Likewise.
* lib/gl_sublist.c (gl_sublist_remove_first, gl_sublist_remove_last):
New functions, based on gl_sublist_remove_at.
(gl_sublist_list_implementation): Implement the new operations.
* lib/gl_list.hh (class gl_List): Add methods remove_first,
remove_last.
* tests/test-array_list.c (main): Test also gl_list_remove_first and
gl_list_remove_last.
* tests/test-avltree_list.c (main): Likewise.
* tests/test-avltreehash_list.c (main): Likewise.
* tests/test-carray_list.c (main): Likewise.
* tests/test-linked_list.c (main): Likewise.
* tests/test-linkedhash_list.c (main): Likewise.
* tests/test-rbtree_list.c (main): Likewise.
* tests/test-rbtreehash_list.c (main): Likewise.
22 files changed: