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* doc/autoconf.texi (Redefined M4 Macros): Document m4_exit,

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m4_if, and m4_wrap.
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Akim Demaille 2001-08-03 09:11:37 +00:00
parent 7d26817715
commit 9429dfeb9c
2 changed files with 45 additions and 6 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2001-08-03 Akim Demaille <akim@epita.fr>
* doc/autoconf.texi (Redefined M4 Macros): Document m4_exit,
m4_if, and m4_wrap.
2001-08-03 Akim Demaille <akim@epita.fr>
* lib/m4sugar/m4sugar.m4 (m4_init): Also forbid `_m4_*' tokens.

46
doc/autoconf.texi
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@ -6430,13 +6430,17 @@ M4sugar''.
@node Redefined M4 Macros, Forbidden Patterns, Programming in M4sugar, Programming in M4sugar
@subsection Redefined M4 Macros
All the M4 native macros are moved in the @samp{m4_} pseudo-namespace,
e.g., M4sugar renames @code{define} as @code{m4_define} etc. There is
one exception: @code{dnl} kept its original name, and no @code{m4_dnl}
is defined.
With a few exceptions, all the M4 native macros are moved in the
@samp{m4_} pseudo-namespace, e.g., M4sugar renames @code{define} as
@code{m4_define} etc.
M4sugar redefines some M4 macros, and made them slightly incompatible
with their native equivalent.
Some M4 macros are redefined, and are slightly incompatible with their
native equivalent.
@defmac dnl
@msindex dnl
This macro kept its original name: no @code{m4_dnl} is defined.
@end defmac
@defmac m4_defn (@var{macro})
@msindex defn
@ -6444,6 +6448,18 @@ Contrary to the M4 builtin, this macro fails if @var{macro} is not
defined. See @code{m4_undefine}.
@end defmac
@defmac m4_exit (@var{exit-status})
@msindex m4_exit
This macro corresponds to @code{m4exit}.
@end defmac
@defmac m4_if (@var{comment})
@defmacx m4_if (@var{string-1}, @var{string-2}, @var{equal}, @ovar{not-equal})
@defmacx m4_if (@var{string-1}, @var{string-2}, @var{equal}, ...)
@msindex m4_if
This macro corresponds to @code{ifelse}.
@end defmac
@defmac m4_undefine (@var{macro})
@msindex undefine
Contrary to the M4 builtin, this macro fails if @var{macro} is not
@ -6463,6 +6479,24 @@ Contrary to the M4 builtin, this macro fails if @var{macro} is not
defined. See @code{m4_undefine}.
@end defmac
@defmac m4_wrap (@var{text})
@msindex m4_wrap
This macro corresponds to @code{m4wrap}.
You are encouraged to end @var{text} with @samp{[]}, so that there are
no risks that two consecutive invocations of @code{m4_wrap} result in an
unexpected pasting of tokens, as in
@example
m4_define([foo], [Foo])
m4_define([bar], [Bar])
m4_define([foobar], [FOOBAR])
m4_wrap([bar])
m4_wrap([foo])
@result{}FOOBAR
@end example
@end defmac
@node Forbidden Patterns, , Redefined M4 Macros, Programming in M4sugar
@subsection Forbidden Patterns