Minor alien fixes

TODO.FACTOR.txt

@@ -1,12 +1,8 @@
 - remove F_USERENV rel
-- method ordering and interpreter algorithm sections need updates
 - update walker for new interpreter
 - quotations should store their originating word
 - core foundation should use unicode strings
 - alien>utf16-string, utf16-string>alien words
-- can <void*> only be called with an alien?
-- remove <char*>, <ushort*>, set-char*-nth, set-ushort*-nth since they
-  have incorrect semantics
 - fix compiled gc check
 - 3 >n fep
 - code walker & exceptions
@@ -22,6 +18,19 @@
 - yield in a loop starves i/o
 - "localhost" 50 <client> won't fail
 
++ help:
+
+- method ordering and interpreter algorithm sections need updates
+- document that can <void*> only be called with an alien
+- help search
+- fix remaining HTML stream issues
+- automatically update help graph when adding/removing articles/words
+- document conventions
+- new turtle graphics tutorial
+- better line spacing in ui and html
+- tabular formatting - for inspector, changes and $values in help
+- grid layout
+
 + ui/help:
 
 - implement handlers for open, quit events, and whatever else
@@ -33,7 +42,6 @@
 - speed up ideas:
   - only do clipping for certain gadgets
   - use glRect
-- help search
 - reimplement tab completion
 - x11 input methods
 - x11 title bars are funny
@@ -45,14 +53,7 @@
 - saving the image should save window configuration
 - make the UI look better, something like this:
   http://twb.ath.cx/~twb/darcs/OBSOLETE/factor/final.html
-- fix remaining HTML stream issues
 - fix up the min thumb size hack
-- automatically update help graph when adding/removing articles/words
-- document conventions
-- new turtle graphics tutorial
-- better line spacing in ui and html
-- tabular formatting - for inspector, changes and $values in help
-- grid layout
 - variable width word wrap
 
 + compiler/ffi:

library/compiler/alien/c-types.factor

@@ -7,8 +7,6 @@ parser sequences strings words ;
 
 : <c-type> ( -- type )
     H{
-        { "setter" [ "Cannot read struct fields with type" throw ] }
-        { "getter" [ "Cannot write struct fields with type" throw ] }
         { "boxer" [ "boxer-function" get %box ] }
         { "unboxer" [ "unboxer-function" get %unbox ] }
         { "reg-class" T{ int-regs f } }
@@ -77,8 +75,7 @@ SYMBOL: c-types
     [ define-c-type ] keep "alien"
     2dup init-c-type
     2dup define-deref
-    2dup define-set-nth
-    define-out ;
+    over c-setter [ 2dup define-set-nth define-out ] when ;
 
 : typedef ( old new -- )
     over "*" append over "*" append (typedef) (typedef) ;

library/compiler/alien/primitive-types.factor

@@ -103,10 +103,6 @@ USING: alien compiler kernel kernel-internals math namespaces ;
 
 [
     [ alien-unsigned-cell <alien> alien>string ] "getter" set
-    [
-        >r >r string>alien alien-address r> r>
-        set-alien-unsigned-cell
-    ] "setter" set
     bootstrap-cell "width" set
     bootstrap-cell "align" set
     "box_c_string" "boxer-function" set
@@ -115,7 +111,6 @@ USING: alien compiler kernel kernel-internals math namespaces ;
 
 [
     [ alien-unsigned-4 ] "getter" set
-    [ set-alien-unsigned-4 ] "setter" set
     bootstrap-cell "width" set
     bootstrap-cell "align" set
     "box_utf16_string" "boxer-function" set

library/compiler/alien/structs.factor

@@ -7,15 +7,25 @@ sequences strings words ;
 
 ! Some code for interfacing with C structures.
 
+: c-getter* ( name -- quot )
+    c-getter [
+        [ "Cannot read struct fields with type" throw ]
+    ] unless* ;
+
 : define-getter ( offset type name -- )
     #! Define a word with stack effect ( alien -- obj ) in the
     #! current 'in' vocabulary.
-    create-in >r c-getter swap add* r> swap define-compound ;
+    create-in >r c-getter* swap add* r> swap define-compound ;
+
+: c-setter* ( name -- quot )
+    c-setter [
+        [ "Cannot write struct fields with type" throw ]
+    ] unless* ;
 
 : define-setter ( offset type name -- )
     #! Define a word with stack effect ( obj alien -- ) in the
     #! current 'in' vocabulary.
-    "set-" swap append create-in >r c-setter swap add* r>
+    "set-" swap append create-in >r c-setter* swap add* r>
     swap define-compound ;
 
 : define-field ( offset type name -- offset )