Merge branch 'require-when' of git://github.com/littledan/Factor

basis/bit-sets/bit-sets-tests.factor

@@ -11,6 +11,9 @@ IN: bit-sets.tests
     T{ bit-set f ?{ f f t f t f } } intersect
 ] unit-test
 
+[ f ] [ T{ bit-set f ?{ t f f f t f } } null? ] unit-test
+[ t ] [ T{ bit-set f ?{ f f f f f f } } null? ] unit-test
+
 [ T{ bit-set f ?{ t f t f f f } } ] [
     T{ bit-set f ?{ t t t f f f } }
     T{ bit-set f ?{ f t f f t t } } diff

basis/bootstrap/compiler/compiler.factor

@@ -20,8 +20,8 @@ IN: bootstrap.compiler
     "alien.remote-control" require
 ] unless
 
-"prettyprint" "alien.prettyprint" require-when
-"debugger" "alien.debugger" require-when
+{ "boostrap.compiler" "prettyprint" } "alien.prettyprint" require-when
+{ "boostrap.compiler" "debugger" } "alien.debugger" require-when
 
 "cpu." cpu name>> append require
 

basis/bootstrap/handbook/handbook.factor

@@ -1,4 +1,4 @@
 USING: vocabs.loader vocabs kernel ;
 IN: bootstrap.handbook
 
-"bootstrap.help" "help.handbook" require-when
+{ "boostrap.handbook" "bootstrap.help" } "help.handbook" require-when

basis/bootstrap/threads/threads.factor

@@ -4,6 +4,6 @@ USING: vocabs.loader kernel io.thread threads
 compiler.utilities namespaces ;
 IN: bootstrap.threads
 
-"debugger" "debugger.threads" require-when
+{ "bootstrap.threads" "debugger" } "debugger.threads" require-when
 
 [ yield ] yield-hook set-global

basis/bootstrap/ui/tools/tools.factor

@@ -4,7 +4,7 @@ USING: kernel vocabs vocabs.loader sequences system ;
 [ "bootstrap." prepend vocab ] all? [
     "ui.tools" require
 
-    "ui.backend.cocoa" "ui.backend.cocoa.tools" require-when
+    { "ui.backend.cocoa" } "ui.backend.cocoa.tools" require-when
 
     "ui.tools.walker" require
 ] when

basis/classes/struct/struct.factor

@@ -404,4 +404,4 @@ FUNCTOR-SYNTAX: STRUCT:
 
 USING: vocabs vocabs.loader ;
 
-"prettyprint" "classes.struct.prettyprint" require-when
+{ "classes.struct" "prettyprint" } "classes.struct.prettyprint" require-when

basis/http/client/client.factor

@@ -194,6 +194,6 @@ ERROR: download-failed response ;
 : http-delete ( url -- response data )
     <delete-request> http-request ;
 
-USING: vocabs vocabs.loader ;
+USE: vocabs.loader
 
-"debugger" "http.client.debugger" require-when
+{ "http.client" "debugger" } "http.client.debugger" require-when

basis/locals/locals.factor

@@ -26,5 +26,5 @@ SYNTAX: MEMO:: (::) define-memoized ;
     "locals.fry"
 } [ require ] each
 
-"prettyprint" "locals.definitions" require-when
-"prettyprint" "locals.prettyprint" require-when
+{ "locals" "prettyprint" } "locals.definitions" require-when
+{ "locals" "prettyprint" } "locals.prettyprint" require-when

basis/math/rectangles/rectangles.factor

@@ -64,4 +64,4 @@ M: rect contains-point?
 
 USE: vocabs.loader
 
-"prettyprint" "math.rectangles.prettyprint" require-when
+{ "math.rectangles" "prettyprint" } "math.rectangles.prettyprint" require-when

basis/math/vectors/simd/simd.factor

@@ -339,4 +339,4 @@ M: short-8 v*hs+
 M: int-4 v*hs+
     int-4-rep [ (simd-v*hs+) ] [ call-next-method ] vv->v-op longlong-2-cast ; inline
 
-"mirrors" "math.vectors.simd.mirrors" require-when
+{ "math.vectors.simd" "mirrors" } "math.vectors.simd.mirrors" require-when

basis/peg/peg.factor

@@ -628,6 +628,6 @@ SYNTAX: PEG:
         ] append!
     ] ;
 
-USING: vocabs vocabs.loader ;
+USE: vocabs.loader
 
-"debugger" "peg.debugger" require-when
+{ "debugger" "peg" } "peg.debugger" require-when

basis/regexp/regexp.factor

@@ -216,6 +216,6 @@ SYNTAX: R` CHAR: ` parsing-regexp ;
 SYNTAX: R{ CHAR: } parsing-regexp ;
 SYNTAX: R| CHAR: | parsing-regexp ;
 
-USING: vocabs vocabs.loader ;
+USE: vocabs.loader
 
-"prettyprint" "regexp.prettyprint" require-when
+{ "prettyprint" "regexp" } "regexp.prettyprint" require-when

basis/specialized-arrays/specialized-arrays.factor

@@ -173,6 +173,6 @@ SYNTAX: SPECIALIZED-ARRAYS:
 SYNTAX: SPECIALIZED-ARRAY:
     scan-c-type define-array-vocab use-vocab ;
 
-"prettyprint" "specialized-arrays.prettyprint" require-when
+{ "specialized-arrays" "prettyprint" } "specialized-arrays.prettyprint" require-when
 
-"mirrors" "specialized-arrays.mirrors" require-when
+{ "specialized-arrays" "mirrors" } "specialized-arrays.mirrors" require-when

basis/stack-checker/errors/errors.factor

@@ -35,4 +35,4 @@ ERROR: bad-declaration-error < inference-error declaration ;
 
 ERROR: unbalanced-branches-error < inference-error word quots declareds actuals ;
 
-"debugger" "stack-checker.errors.prettyprint" require-when
+{ "stack-checker.errors" "debugger" } "stack-checker.errors.prettyprint" require-when

basis/typed/typed.factor

@@ -164,6 +164,6 @@ SYNTAX: TYPED:
 SYNTAX: TYPED::
     (::) define-typed ;
 
-USING: vocabs vocabs.loader ;
+USE: vocabs.loader
 
-"prettyprint" "typed.prettyprint" require-when
+{ "typed" "prettyprint" } "typed.prettyprint" require-when

basis/ui/gadgets/gadgets.factor

@@ -395,4 +395,4 @@ M: f request-focus-on 2drop ;
 
 USE: vocabs.loader
 
-"prettyprint" "ui.gadgets.prettyprint" require-when
+{ "ui.gadgets" "prettyprint" } "ui.gadgets.prettyprint" require-when

basis/unix/unix.factor

@@ -72,6 +72,6 @@ M: unix open-file [ open ] unix-system-call ;
 
 <<
 
-"debugger" "unix.debugger" require-when
+{ "unix" "debugger" } "unix.debugger" require-when
 
 >>

basis/urls/urls.factor

@@ -185,4 +185,4 @@ SYNTAX: URL" lexer get skip-blank parse-string >url suffix! ;
 
 USE: vocabs.loader
 
-"prettyprint" "urls.prettyprint" require-when
+{ "urls" "prettyprint" } "urls.prettyprint" require-when

basis/windows/com/syntax/syntax.factor

@@ -96,4 +96,4 @@ SYNTAX: GUID: scan string>guid suffix! ;
 
 USE: vocabs.loader
 
-"prettyprint" "windows.com.prettyprint" require-when
+{ "windows.com" "prettyprint" } "windows.com.prettyprint" require-when

basis/x11/x11.factor

@@ -33,4 +33,4 @@ SYMBOL: root
 : with-x ( display-string quot -- )
     [ init-x ] dip [ close-x ] [ ] cleanup ; inline
 
-"io.backend.unix" "x11.io.unix" require-when
+{ "x11" "io.backend.unix" } "x11.io.unix" require-when

basis/xml/syntax/syntax.factor

@@ -177,4 +177,4 @@ SYNTAX: [XML
 
 USE: vocabs.loader
 
-"inverse" "xml.syntax.inverse" require-when
+{ "xml.syntax" "inverse" } "xml.syntax.inverse" require-when

core/hash-sets/hash-sets-tests.factor

@@ -31,3 +31,6 @@ IN: hash-sets.tests
 [ f ] [ HS{ 1 2 3 } HS{ 2 3 } set= ] unit-test
 
 [ HS{ 1 2 } HS{ 1 2 3 } ] [ HS{ 1 2 } clone dup clone [ 3 swap adjoin ] keep ] unit-test
+
+[ t ] [ HS{ } null? ] unit-test
+[ f ] [ HS{ 1 } null? ] unit-test

core/hash-sets/hash-sets.factor

@@ -18,6 +18,7 @@ M: hash-set delete table>> delete-at ; inline
 M: hash-set members table>> keys ; inline
 M: hash-set set-like drop dup hash-set? [ members <hash-set> ] unless ;
 M: hash-set clone table>> clone hash-set boa ;
+M: hash-set null? table>> assoc-empty? ;
 
 M: sequence fast-set <hash-set> ;
 M: f fast-set drop H{ } clone hash-set boa ;

core/sets/sets-docs.factor

@@ -23,6 +23,8 @@ ARTICLE: "set-operations" "Operations on sets"
     adjoin
     delete
 }
+"To test if a set is the empty set:"
+{ $subsections null? }
 "Basic mathematical operations, which any type of set may override for efficiency:"
 { $subsections
     diff
@@ -178,3 +180,7 @@ HELP: within
 HELP: without
 { $values { "seq" sequence } { "set" set } { "subseq" sequence } }
 { $description "Returns the subsequence of the given sequence consisting of things that are not members of the set. This may contain duplicates, if the sequence has duplicates." } ;
+
+HELP: null?
+{ $values { "set" set } { "?" "a boolean" } }
+{ $description "Tests whether the given set is empty. This outputs " { $snippet "t" } " when given a null set of any type." } ;

core/sets/sets-tests.factor

@@ -61,3 +61,6 @@ IN: sets.tests
 [ f ] [ HS{ 1 2 3 1 2 1 } duplicates ] unit-test
 
 [ H{ { 3 HS{ 1 2 } } } ] [ H{ } clone 1 3 pick adjoin-at 2 3 pick adjoin-at ] unit-test
+
+[ t ] [ f null? ] unit-test
+[ f ] [ { 4 } null? ] unit-test

core/sets/sets.factor

@@ -21,10 +21,13 @@ GENERIC: subset? ( set1 set2 -- ? )
 GENERIC: set= ( set1 set2 -- ? )
 GENERIC: duplicates ( set -- seq )
 GENERIC: all-unique? ( set -- ? )
+GENERIC: null? ( set -- ? )
 
 ! Defaults for some methods.
 ! Override them for efficiency
 
+M: set null? members null? ; inline
+
 M: set set-like drop ; inline
 
 M: set union
@@ -91,6 +94,9 @@ M: sequence set-like
 
 M: sequence members
     [ pruned ] keep like ;
+  
+M: sequence null?
+    empty? ; inline
 
 : combine ( sets -- set )
     [ f ]

core/vocabs/loader/loader-docs.factor

@@ -114,10 +114,10 @@ HELP: require
 { $notes "To unconditionally reload a vocabulary, use " { $link reload } ". To reload changed source files only, use the words in " { $link "vocabs.refresh" } "." } ;
 
 HELP: require-when
-{ $values { "if" "a vocabulary specifier" } { "then" "a vocabulary specifier" } }
-{ $description "Loads the " { $snippet "then" } " vocabulary if it is not loaded and the " { $snippet "if" } " vocabulary is. If the " { $snippet "if" } " vocabulary is not loaded now, but it is later, then the " { $snippet "then" } " vocabulary will be loaded along with it at that time." }
-{ $notes "This is used to express a joint dependency of vocabularies. If vocabularies " { $snippet "a" } " and " { $snippet "b" } " use code in vocabulary " { $snippet "c" } " to interact, then the following line can be placed in " { $snippet "a" } " in order express the dependency."
-{ $code "\"b\" \"c\" require-when" } } ;
+{ $values { "if" "a sequence of vocabulary specifiers" } { "then" "a vocabulary specifier" } }
+{ $description "Loads the " { $snippet "then" } " vocabulary if it is not loaded and all of the " { $snippet "if" } " vocabulary is. If some of the " { $snippet "if" } " vocabularies are not loaded now, but they are later, then the " { $snippet "then" } " vocabulary will be loaded along with the final one." }
+{ $notes "This is used to express a joint dependency of vocabularies. If vocabularies " { $snippet "a" } " and " { $snippet "b" } " use code in vocabulary " { $snippet "c" } " to interact, then the following line, which can be placed in " { $snippet "a" } " or " { $snippet "b" } ", expresses the dependency."
+{ $code "{ \"a\" \"b\" } \"c\" require-when" } } ;
 
 HELP: run
 { $values { "vocab" "a vocabulary specifier" } }

core/vocabs/loader/loader.factor

@@ -66,10 +66,19 @@ DEFER: require
 
 <PRIVATE
 
-: load-conditional-requires ( vocab-name -- )
-    conditional-requires get
-    [ at [ require ] each ] 
-    [ delete-at ] 2bi ;
+SYMBOL: require-when-vocabs
+require-when-vocabs [ HS{ } clone ] initialize
+
+SYMBOL: require-when-table
+require-when-table [ V{ } clone ] initialize
+
+: load-conditional-requires ( vocab -- )
+    vocab-name require-when-vocabs get in? [
+        require-when-table get [
+            [ [ vocab ] all? ] dip
+            [ require ] curry when
+        ] assoc-each
+    ] when ;
 
 : load-source ( vocab -- )
     dup check-vocab-hook get call( vocab -- )
@@ -79,7 +88,7 @@ DEFER: require
         [ +parsing+ >>source-loaded? ] dip
         [ % ] [ call( -- ) ] if-bootstrapping
         +done+ >>source-loaded?
-        vocab-name load-conditional-requires
+        load-conditional-requires
     ] [ ] [ f >>source-loaded? ] cleanup ;
 
 : load-docs ( vocab -- )
@@ -97,10 +106,12 @@ PRIVATE>
     load-vocab drop ;
 
 : require-when ( if then -- )
-    over vocab
-    [ nip require ]
-    [ swap conditional-requires get [ swap suffix ] change-at ]
-    if ;
+    over [ vocab ] all? [
+        require drop
+    ] [
+        [ drop [ require-when-vocabs get adjoin ] each ]
+        [ 2array require-when-table get push ] 2bi
+    ] if ;
 
 : reload ( name -- )
     dup vocab

core/vocabs/loader/test/m/m.factor

@@ -1,4 +1,5 @@
 USE: vocabs.loader
 IN: vocabs.loader.test.m
 
-"vocabs.loader.test.o" "vocabs.loader.test.n" require-when
+{ "vocabs.loader.test.o" "vocabs.loader.test.m" }
+"vocabs.loader.test.n" require-when

core/vocabs/vocabs.factor

@@ -1,7 +1,7 @@
 ! Copyright (C) 2007, 2009 Eduardo Cavazos, Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: accessors assocs strings kernel sorting namespaces
-sequences definitions sets ;
+sequences definitions sets combinators ;
 IN: vocabs
 
 SYMBOL: dictionary
@@ -83,9 +83,6 @@ ERROR: bad-vocab-name name ;
 : check-vocab-name ( name -- name )
     dup string? [ bad-vocab-name ] unless ;
 
-SYMBOL: conditional-requires
-conditional-requires [ H{ } clone ] initialize
-
 : create-vocab ( name -- vocab )
     check-vocab-name
     dictionary get [ <vocab> ] cache

extra/game/loop/loop.factor

@@ -112,6 +112,6 @@ PRIVATE>
 M: game-loop dispose
     stop-loop ;
 
-USING: vocabs vocabs.loader ;
+USE: vocabs.loader
 
-"prettyprint" "game.loop.prettyprint" require-when
+{ "game.loop" "prettyprint" } "game.loop.prettyprint" require-when

extra/gpu/shaders/shaders.factor

@@ -632,4 +632,4 @@ M: program-instance dispose
     [ world>> ] [ program>> instances>> ] [ ] tri ?delete-at
     reset-memos ;
 
-"prettyprint" "gpu.shaders.prettyprint" require-when
+{ "gpu.shaders" "prettyprint" } "gpu.shaders.prettyprint" require-when