7 uses of COMMENT_MODE_FLAT

CommentPagerTest::testCommentNewPageIndicator in drupal-7.x/modules/comment/comment.test
Test comment_new_page_count().
CommentPagerTest::testCommentOrderingThreading in drupal-7.x/modules/comment/comment.test
Test comment ordering and threading.
CommentPagerTest::testCommentPaging in drupal-7.x/modules/comment/comment.test
Confirm comment paging works correctly with flat and threaded comments.
comment_get_display_ordinal in drupal-7.x/modules/comment/comment.module
Get the display ordinal for a comment, starting from 0.
comment_get_thread in drupal-7.x/modules/comment/comment.module
Retrieve comments for a thread.
comment_new_page_count in drupal-7.x/modules/comment/comment.module
Calculate page number for first new comment.
_comment_get_modes in drupal-7.x/modules/comment/comment.module
Return an array of viewing modes for comment listings.