@end itemize
+In addition, SBCL supports extensions to the Metaobject protocol from
+AMOP; at present, they are:
+
+@itemize
+
+@item
+@findex defmethod
+@findex find-class
+@findex intern-eql-specializer
+@findex sb-mop:intern-eql-specializer
+@findex make-method-specializers-form
+@findex sb-pcl:make-method-specializers-form
+@findex make-method-lambda
+@findex sb-mop:make-method-lambda
+compile-time support for generating specializer metaobjects from
+specializer names in @code{defmethod} forms is provided by the
+@code{make-method-specializers-form} function, which returns a form
+which, when evaluated in the lexical environment of the
+@code{defmethod}, returns a list of specializer metaobjects. This
+operator suffers from similar restrictions to those affecting
+@code{make-method-lambda}, namely that the generic function must be
+defined when the @code{defmethod} form is expanded, so that the
+correct method of @code{make-method-specializers-form} is invoked.
+The system-provided method on @code{make-method-specializers-form}
+generates a call to @code{find-class} for each symbol specializer
+name, and a call to @code{intern-eql-specializer} for each @code{(eql
+@var{x})} specializer name.
+
+@item
+@findex find-method
+@findex parse-specializer-using-class
+@findex unparse-specializer-using-class
+@findex sb-pcl:parse-specializer-using-class
+@findex sb-pcl:unparse-specializer-using-class
+run-time support for converting between specializer names and
+specializer metaobjects, mostly for the purposes of
+@code{find-method}, is provided by
+@code{parse-specializer-using-class} and
+@code{unparse-specializer-using-class}, which dispatch on their first
+argument, the generic function associated with a method with the given
+specializer. The system-provided methods on those methods convert
+between classes and proper names and between lists of the form
+@code{(eql @var{x})} and interned eql specializer objects.
+
+@end itemize
+
@node Support For Unix
@comment node-name, next, previous, up
@section Support For Unix
+@menu
+* Command-line arguments::
+* Querying the process environment::
+* Running external programs::
+@end menu
+
+@node Command-line arguments
+@subsection Command-line arguments
+@vindex sb-ext:*posix-argv*
+@vindex *posix-argv*
+
The UNIX command line can be read from the variable
-@code{sb-ext:*posix-argv*}. The UNIX environment can be queried with
-the @code{sb-ext:posix-getenv} function.
+@code{sb-ext:*posix-argv*}.
+
+@node Querying the process environment
+@subsection Querying the process environment
+
+The UNIX environment can be queried with the
+@code{sb-ext:posix-getenv} function.
@include fun-sb-ext-posix-getenv.texinfo
+@node Running external programs
+@subsection Running external programs
+
External programs can be run with @code{sb-ext:run-program}.
+@footnote{In SBCL versions prior to 1.0.13, @code{sb-ext:run-program}
+searched for executables in a manner somewhat incompatible with other
+languages. As of this version, SBCL uses the system library routine
+@code{execvp(3)}, and no longer contains the function,
+@code{find-executable-in-search-path}, which implemented the old
+search. Users who need this function may find it
+in @file{run-program.lisp} versions 1.67 and earlier in SBCL's CVS
+repository here
+@url{http://sbcl.cvs.sourceforge.net/sbcl/sbcl/src/code/run-program.lisp?view=log}. However,
+we caution such users that this search routine finds executables that
+system library routines do not.}
@include fun-sb-ext-run-program.texinfo
+When @code{sb-ext:run-program} is called with @code{wait} equal to
+NIL, an instance of class @var{sb-ext:process} is returned. The
+following functions are available for use with processes:
+
@include fun-sb-ext-process-p.texinfo
@include fun-sb-ext-process-input.texinfo
@node Tools To Help Developers
@comment node-name, next, previous, up
@section Tools To Help Developers
+@findex trace
+@findex inspect
SBCL provides a profiler and other extensions to the ANSI @code{trace}
facility. For more information, see @ref{Macro common-lisp:trace}.
@node Resolution of Name Conflicts
@section Resolution of Name Conflicts
+@tindex sb-ext:name-conflict
+@tindex name-conflict
+@findex sb-ext:name-conflict-symbols
+@findex name-conflict-symbols
The ANSI standard (section 11.1.1.2.5) requires that name conflicts in
packages be resolvable in favour of any of the conflicting symbols. In
projects / sbcl.git / blobdiff