-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 POSIX is explicit that only <blank>s and <newline>s may be discarded when collecting macro arguments (ie. space, \t, and \n). However, I just filed an aardvark, since GNU m4, FreeBSD [1], and heirloom-devtools (based on OpenSolaris) [2] all use isspace() instead of isblank() to do the filtering (ie. blanks, but also \f, \v, and \r). For an example,
$ printf 'len(\f) ' | m4 should output 1 per a strict reading of POSIX, but outputs 0 on every implementation I have access to. I will wait until the Austin group makes a ruling on my aardvark before deciding whether it is worth patching GNU m4 to use isblank() instead of isspace() when POSIXLY_CORRECT. [1] http://cvsup.pt.freebsd.org/cgi-bin/cvsweb/cvsweb.cgi/src/usr.bin/m4/main.c?rev=1.26&content-type=text/x-cvsweb-markup [2] http://heirloom.cvs.sourceforge.net/heirloom/heirloom-devtools/m4/m4.h?revision=1.1&view=markup - -- Life is short - so eat dessert first! Eric Blake [EMAIL PROTECTED] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.1 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFOs/n84KuGfSFAYARAjzDAJ4yMzH7uUqw4/Z0tPvYh3SPYpuTBQCdGLO1 A2Xmxse5xpEyoIl9VqrbWHk= =h78s -----END PGP SIGNATURE----- _______________________________________________ M4-discuss mailing list M4-discuss@gnu.org http://lists.gnu.org/mailman/listinfo/m4-discuss
