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Added mdoclint.
`make regress' uses mdoclint

.\" $Id: mdoctree.1,v 1.4 2009/02/23 13:05:06 kristaps Exp $
.\"
.\" Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the
.\" above copyright notice and this permission notice appear in all
.\" copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
.\" WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
.\" AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
.\" DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
.\" PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
.\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
.\" PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: February 23 2009 $
.Dt mdoctree 1
.Os
.\" SECTION
.Sh NAME
.Nm mdoctree
.Nd mdoc macro compiler
.\" SECTION
.Sh SYNOPSIS
.Nm mdoctree
.Op Fl v
.Op Fl W Ns Ar err...
.Op Ar infile
.\" SECTION
.Sh DESCRIPTION
The
.Nm
utility parses a BSD 
.Dq mdoc 
manual pages and prints its syntax tree.  It's commonly used to see the
syntax tree of a document when building new 
.Xr mdoc 3
utilities.  The arguments are as follows:
.Bl -tag -width "\-Werr... "
.\" ITEM
.It Fl v
Print verbose parsing output.
.\" ITEM
.It Fl W Ns Ar err...
Print warning messages.  May be set to 
.Fl W Ns Ar all
for all warnings, 
.Ar compat
for groff/troff-compatibility warnings, or
.Ar syntax
for syntax warnings.  If
.Fl W Ns Ar error 
is specified, warnings are considered errors and cause utility
termination.  Multiple 
.Fl W
arguments may be comma-separated, such as
.Fl W Ns Ar error,all .
.\" ITEM
.It Ar infile
Read input from
.Ar infile ,
which may be 
.Dq \-
for stdin.
.El
.\" PARAGRAPH
.Pp
The
.Nm
utility is a formatting front-end for
.Xr mdoc 3 ,
which parses the 
.Dq mdoc
input, documented at
.Xr mdoc 7
and
.Xr mdoc.samples 7 ,
into an abstract syntax tree.
.\" PARAGRAPH
.Pp
By default,
.Nm
reads from stdin and prints the syntax tree to stdout.
.\" PARAGRAPH
.Pp
.Ex -std mdoctree
.\" PARAGRAPH
.Pp
.Nm
is
.Ud
.\" SECTION
.Sh EXAMPLES
To validate this manual page:
.\" PARAGRAPH
.Pp
.D1 % mdoctree \-Wall,error mdoctree.1 
.\" SECTION
.Sh SEE ALSO
.Xr mdocterm 1 ,
.Xr mdoclint 1 ,
.Xr mdoc.samples 7 ,
.Xr mdoc 7 ,
.Xr mdoc 3
.\" 
.Sh AUTHORS
The
.Nm
utility was written by 
.An Kristaps Dzonsons Aq kristaps@kth.se .
.\" SECTION
.Sh CAVEATS
See
.Xr mdoc 3
for a list of bugs, caveats, and incomplete macros.