文件操作 - ax_check_awk_array_delete_elem.m4
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文件: /usr/share/aclocal/ax_check_awk_array_delete_elem.m4
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# =================================================================================== # https://www.gnu.org/software/autoconf-archive/ax_check_awk_array_delete_elem.html # =================================================================================== # # SYNOPSIS # # AX_CHECK_AWK_ARRAY_DELETE_ELEM([ACTION-IF-SUCCESS],[ACTION-IF-FAILURE]) # # DESCRIPTION # # Check if AWK supports delete on array element. If successful execute # ACTION-IF-SUCCESS otherwise ACTION-IF-FAILURE. # # This work is heavily based upon testawk.sh script by Heiner Steven. You # should find his script (and related works) at # <http://www.shelldorado.com/articles/awkcompat.html>. Thanks to # Alessandro Massignan for his suggestions and extensive nawk tests on # FreeBSD. # # LICENSE # # Copyright (c) 2009 Francesco Salvestrini <salvestrini@users.sourceforge.net> # # Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved. This file is offered as-is, without any # warranty. #serial 9 AC_DEFUN([AX_CHECK_AWK_ARRAY_DELETE_ELEM], [ AX_TRY_AWK_EXPOUT([array delete element], [],[ a[1]=1; delete a[1]; if (a[1]!=0) exit (1) ],[], [$1],[$2]) ])
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