Add a parsing word to output slots to the stack instead of to an array
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b059ade5ed
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3faa1a57d3
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@ -3,6 +3,16 @@
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USING: help.markup help.syntax ;
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IN: slots.syntax
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HELP: slots[
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{ $description "Outputs several slot values to the stack." }
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{ $example "USING: kernel prettyprint slots.syntax ;"
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"IN: slots.syntax.example"
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"TUPLE: rectangle width height ;"
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"T{ rectangle { width 3 } { height 5 } } slots[ width height ] [ . ] bi@"
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"""3
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5"""
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} ;
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HELP: slots{
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{ $description "Outputs an array of slot values from a tuple." }
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{ $example "USING: prettyprint slots.syntax ;"
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@ -14,6 +24,8 @@ HELP: slots{
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ARTICLE: "slots.syntax" "Slots syntax sugar"
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"The " { $vocab-link "slots.syntax" } " vocabulary provides an alternative syntax for taking a sequence of slots from a tuple." $nl
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"Syntax sugar for cleaving slots to the stack:"
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{ $subsections POSTPONE: slots[ }
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"Syntax sugar for cleaving slots to an array:"
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{ $subsections POSTPONE: slots{ } ;
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@ -5,6 +5,10 @@ IN: slots.syntax.tests
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TUPLE: slot-test a b c ;
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[ 1 2 3 ] [ T{ slot-test f 1 2 3 } slots[ a b c ] ] unit-test
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[ 3 ] [ T{ slot-test f 1 2 3 } slots[ c ] ] unit-test
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[ ] [ T{ slot-test f 1 2 3 } slots[ ] ] unit-test
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[ { 1 2 3 } ] [ T{ slot-test f 1 2 3 } slots{ a b c } ] unit-test
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[ { 3 } ] [ T{ slot-test f 1 2 3 } slots{ c } ] unit-test
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[ { } ] [ T{ slot-test f 1 2 3 } slots{ } ] unit-test
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@ -4,6 +4,10 @@ USING: combinators combinators.smart fry lexer quotations
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sequences slots ;
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IN: slots.syntax
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SYNTAX: slots[
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"]" [ reader-word 1quotation ] map-tokens
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'[ _ cleave ] append! ;
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SYNTAX: slots{
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"}" [ reader-word 1quotation ] map-tokens
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'[ [ _ cleave ] output>array ] append! ;
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