--- gforth/stuff.fs 1999/12/03 18:24:23 1.13 +++ gforth/stuff.fs 2000/11/29 22:21:57 1.18 @@ -1,6 +1,6 @@ \ miscelleneous words -\ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. +\ Copyright (C) 1996,1997,1998,2000 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -16,8 +16,9 @@ \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software -\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. +require glocals.fs ' require alias needs ( ... "name" -- ... ) \ gforth \G An alias for @code{require}; exists on other systems (e.g., Win32Forth). @@ -49,8 +50,8 @@ AUser CSP \G @code{Value} -- the exit status returned by the most recently executed \G @code{system} command. -: system ( addr u -- ) \ gforth -\G Pass the string specified by @var{c-addr, u} to the host operating system +: system ( c-addr u -- ) \ gforth +\G Pass the string specified by @var{c-addr u} to the host operating system \G for execution in a sub-shell. (system) throw TO $? ; @@ -70,3 +71,38 @@ AUser CSP : in-return-stack? ( addr -- f ) rp0 @ swap - [ forthstart 6 cells + ]L @ u< ; + +\ const-does> + +: compile-literals ( w*u u -- ; run-time: -- w*u ) recursive + \ compile u literals, starting with the bottommost one + ?dup-if + swap >r 1- compile-literals + r> POSTPONE literal + endif ; + +: compile-fliterals ( r*u u -- ; run-time: -- w*u ) recursive + \ compile u fliterals, starting with the bottommost one + ?dup-if + { F: r } 1- compile-fliterals + r POSTPONE fliteral + endif ; + +: (const-does>) ( w*uw r*ur uw ur target "name" -- ) + \ define a colon definition "name" containing w*uw r*ur as + \ literals and a call to target. + { uw ur target } + header docol: cfa, \ start colon def without stack junk + ur compile-fliterals uw compile-literals + target compile, POSTPONE exit reveal ; + +: const-does> ( run-time: w*uw r*ur uw ur "name" -- ) + \G Defines @var{name} and returns.@sp 0 + \G @var{name} execution: pushes @var{w*uw r*ur}, then performs the + \G code following the @code{const-does>}. + here >r 0 POSTPONE literal + POSTPONE (const-does>) + POSTPONE ; + noname : POSTPONE rdrop + lastxt r> cell+ ! \ patch the literal +; immediate