346 lines
12 KiB
Factor
346 lines
12 KiB
Factor
USING: help.syntax help.markup kernel sequences quotations
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math arrays combinators ;
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IN: generalizations
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HELP: nsequence
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{ $values { "n" integer } { "seq" "an exemplar" } }
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{ $description "A generalization of " { $link 2sequence } ", "
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{ $link 3sequence } ", and " { $link 4sequence } " "
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"that constructs a sequence from the top " { $snippet "n" } " elements of the stack."
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}
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{ $examples
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{ $example "USING: generalizations prettyprint ;" "CHAR: f CHAR: i CHAR: s CHAR: h 4 \"\" nsequence ." "\"fish\"" }
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} ;
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HELP: narray
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link 1array } ", "
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{ $link 2array } ", " { $link 3array } " and " { $link 4array } " "
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"that constructs an array from the top " { $snippet "n" } " elements of the stack."
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}
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{ $examples
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"Some core words expressed in terms of " { $link narray } ":"
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{ $table
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{ { $link 1array } { $snippet "1 narray" } }
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{ { $link 2array } { $snippet "2 narray" } }
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{ { $link 3array } { $snippet "3 narray" } }
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{ { $link 4array } { $snippet "4 narray" } }
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}
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} ;
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{ nsequence narray } related-words
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HELP: nsum
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{ $values { "n" integer } }
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{ $description "Adds the top " { $snippet "n" } " stack values." } ;
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HELP: firstn
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link first } ", "
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{ $link first2 } ", " { $link first3 } " and " { $link first4 } " "
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"that pushes the first " { $snippet "n" } " elements of a sequence on the stack."
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}
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{ $examples
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"Some core words expressed in terms of " { $link firstn } ":"
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{ $table
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{ { $link first } { $snippet "1 firstn" } }
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{ { $link first2 } { $snippet "2 firstn" } }
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{ { $link first3 } { $snippet "3 firstn" } }
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{ { $link first4 } { $snippet "4 firstn" } }
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}
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} ;
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HELP: npick
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link dup } ", "
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{ $link over } " and " { $link pick } " that can work "
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"for any stack depth. The nth item down the stack will be copied and "
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"placed on the top of the stack."
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}
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{ $examples
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{ $example "USING: kernel prettyprint generalizations ;" "1 2 3 4 4 npick 5 narray ." "{ 1 2 3 4 1 }" }
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"Some core words expressed in terms of " { $link npick } ":"
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{ $table
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{ { $link dup } { $snippet "1 npick" } }
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{ { $link over } { $snippet "2 npick" } }
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{ { $link pick } { $snippet "3 npick" } }
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}
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} ;
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HELP: ndup
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link dup } ", "
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{ $link 2dup } " and " { $link 3dup } " that can work "
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"for any number of items. The n topmost items on the stack will be copied and "
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"placed on the top of the stack."
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}
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{ $examples
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{ $example "USING: prettyprint generalizations kernel ;" "1 2 3 4 4 ndup 8 narray ." "{ 1 2 3 4 1 2 3 4 }" }
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"Some core words expressed in terms of " { $link ndup } ":"
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{ $table
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{ { $link dup } { $snippet "1 ndup" } }
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{ { $link 2dup } { $snippet "2 ndup" } }
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{ { $link 3dup } { $snippet "3 ndup" } }
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}
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} ;
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HELP: nnip
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link nip } " and " { $link 2nip }
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" that can work "
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"for any number of items."
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}
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{ $examples
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{ $example "USING: prettyprint generalizations kernel ;" "1 2 3 4 3 nnip ." "4" }
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"Some core words expressed in terms of " { $link nnip } ":"
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{ $table
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{ { $link nip } { $snippet "1 nnip" } }
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{ { $link 2nip } { $snippet "2 nnip" } }
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}
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} ;
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HELP: ndrop
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link drop }
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" that can work "
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"for any number of items."
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}
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{ $examples
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{ $example "USING: prettyprint generalizations kernel ;" "1 2 3 4 3 ndrop ." "1" }
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"Some core words expressed in terms of " { $link ndrop } ":"
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{ $table
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{ { $link drop } { $snippet "1 ndrop" } }
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{ { $link 2drop } { $snippet "2 ndrop" } }
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{ { $link 3drop } { $snippet "3 ndrop" } }
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}
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} ;
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HELP: nrot
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link rot } " that works for any "
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"number of items on the stack. "
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}
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{ $examples
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{ $example "USING: arrays generalizations kernel prettyprint ;" "1 2 3 4 4 nrot 4array ." "{ 2 3 4 1 }" }
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"Some core words expressed in terms of " { $link nrot } ":"
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{ $table
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{ { $link swap } { $snippet "1 nrot" } }
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{ { $link rot } { $snippet "2 nrot" } }
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}
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} ;
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HELP: -nrot
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{ $values { "n" integer } }
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{ $description "A generalization of " { $link -rot } " that works for any "
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"number of items on the stack. "
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}
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{ $examples
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{ $example "USING: arrays generalizations kernel prettyprint ;" "1 2 3 4 4 -nrot 4array ." "{ 4 1 2 3 }" }
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"Some core words expressed in terms of " { $link -nrot } ":"
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{ $table
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{ { $link swap } { $snippet "1 -nrot" } }
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{ { $link -rot } { $snippet "2 -nrot" } }
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}
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} ;
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HELP: ndip
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{ $values { "quot" quotation } { "n" integer } }
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{ $description "A generalization of " { $link dip } " that can work "
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"for any stack depth. The quotation will be called with a stack that "
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"has 'n' items removed first. The 'n' items are then put back on the "
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"stack. The quotation can consume and produce any number of items."
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}
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{ $examples
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{ $example "USING: arrays generalizations kernel prettyprint ;" "1 2 [ dup ] 1 ndip 3array ." "{ 1 1 2 }" }
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{ $example "USING: arrays generalizations kernel prettyprint ;" "1 2 3 [ drop ] 2 ndip 2array ." "{ 2 3 }" }
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"Some core words expressed in terms of " { $link ndip } ":"
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{ $table
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{ { $link dip } { $snippet "1 ndip" } }
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{ { $link 2dip } { $snippet "2 ndip" } }
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{ { $link 3dip } { $snippet "3 ndip" } }
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}
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} ;
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HELP: nkeep
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{ $values { "quot" quotation } { "n" integer } }
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{ $description "A generalization of " { $link keep } " that can work "
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"for any stack depth. The first " { $snippet "n" } " items after the quotation will be "
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"saved, the quotation called, and the items restored."
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}
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{ $examples
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{ $example "USING: generalizations kernel prettyprint ;" "1 2 3 4 5 [ drop drop drop drop drop 99 ] 5 nkeep 6 narray ." "{ 99 1 2 3 4 5 }" }
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"Some core words expressed in terms of " { $link nkeep } ":"
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{ $table
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{ { $link keep } { $snippet "1 nkeep" } }
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{ { $link 2keep } { $snippet "2 nkeep" } }
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{ { $link 3keep } { $snippet "3 nkeep" } }
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}
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} ;
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HELP: ncurry
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{ $values { "quot" quotation } { "n" integer } }
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{ $description "A generalization of " { $link curry } " that can work for any stack depth."
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}
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{ $examples
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"Some core words expressed in terms of " { $link ncurry } ":"
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{ $table
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{ { $link curry } { $snippet "1 ncurry" } }
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{ { $link 2curry } { $snippet "2 ncurry" } }
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{ { $link 3curry } { $snippet "3 ncurry" } }
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}
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} ;
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HELP: nwith
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{ $values { "quot" quotation } { "n" integer } }
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{ $description "A generalization of " { $link with } " that can work for any stack depth."
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}
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{ $examples
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"Some core words expressed in terms of " { $link nwith } ":"
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{ $table
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{ { $link with } { $snippet "1 nwith" } }
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}
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} ;
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HELP: napply
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{ $values { "quot" quotation } { "n" integer } }
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{ $description "A generalization of " { $link bi@ } " and " { $link tri@ } " that can work for any stack depth."
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}
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{ $examples
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"Some core words expressed in terms of " { $link napply } ":"
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{ $table
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{ { $link call } { $snippet "1 napply" } }
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{ { $link bi@ } { $snippet "2 napply" } }
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{ { $link tri@ } { $snippet "3 napply" } }
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}
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} ;
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HELP: ncleave
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{ $values { "quots" "a sequence of quotations" } { "n" integer } }
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{ $description "A generalization of " { $link cleave } " and " { $link 2cleave } " that can work for any quotation arity."
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}
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{ $examples
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"Some core words expressed in terms of " { $link ncleave } ":"
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{ $table
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{ { $link cleave } { $snippet "1 ncleave" } }
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{ { $link 2cleave } { $snippet "2 ncleave" } }
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}
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} ;
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HELP: nspread
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{ $values { "quots" "a sequence of quotations" } { "n" integer } }
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{ $description "A generalization of " { $link spread } " that can work for any quotation arity."
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} ;
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HELP: mnswap
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{ $values { "m" integer } { "n" integer } }
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{ $description "Swaps the top " { $snippet "m" } " stack elements with the " { $snippet "n" } " elements directly underneath." }
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{ $examples
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"Some core words expressed in terms of " { $link mnswap } ":"
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{ $table
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{ { $link swap } { $snippet "1 1 mnswap" } }
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{ { $link rot } { $snippet "2 1 mnswap" } }
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{ { $link -rot } { $snippet "1 2 mnswap" } }
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}
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} ;
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HELP: nweave
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{ $values { "n" integer } }
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{ $description "Copies the top " { $snippet "n" } " stack elements underneath each one of the " { $snippet "n" } " elements below." }
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{ $examples
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{ $example
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"USING: arrays kernel generalizations prettyprint ;"
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"\"e1\" \"e2\" \"o1\" \"o2\" 2 nweave [ 3array ] 3dip 3array 2array ."
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"{ { \"e1\" \"o1\" \"o2\" } { \"e2\" \"o1\" \"o2\" } }"
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}
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} ;
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HELP: n*quot
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{ $values
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{ "n" integer } { "quot" quotation }
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{ "quot'" quotation }
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}
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{ $examples
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{ $example "USING: generalizations prettyprint math ;"
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"3 [ + ] n*quot ."
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"[ + + + ]"
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}
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}
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{ $description "Construct a quotation containing the contents of " { $snippet "seq" } " repeated " { $snippet "n"} " times." } ;
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HELP: nappend
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{ $values
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{ "n" integer }
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{ "seq" sequence }
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}
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{ $description "Outputs a new sequence consisting of the elements of the top " { $snippet "n" } " sequences from the datastack in turn." }
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{ $errors "Throws an error if any of the sequences contain elements that are not permitted in the sequence type of the first sequence." }
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{ $examples
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{ $example "USING: generalizations prettyprint math ;"
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"{ 1 2 } { 3 4 } { 5 6 } { 7 8 } 4 nappend ."
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"{ 1 2 3 4 5 6 7 8 }"
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}
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} ;
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HELP: nappend-as
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{ $values
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{ "n" integer } { "exemplar" sequence }
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{ "seq" sequence }
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}
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{ $description "Outputs a new sequence of type " { $snippet "exemplar" } " consisting of the elements of the top " { $snippet "n" } " sequences from the datastack in turn." }
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{ $errors "Throws an error if any of the sequences contain elements that are not permitted in the sequence type of the first sequence." }
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{ $examples
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{ $example "USING: generalizations prettyprint math ;"
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"{ 1 2 } { 3 4 } { 5 6 } { 7 8 } 4 V{ } nappend-as ."
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"V{ 1 2 3 4 5 6 7 8 }"
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}
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} ;
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{ nappend nappend-as } related-words
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HELP: ntuck
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{ $values
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{ "n" integer }
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}
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{ $description "A generalization of " { $link tuck } " that can work for any stack depth. The top item will be copied and placed " { $snippet "n" } " items down on the stack." } ;
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ARTICLE: "sequence-generalizations" "Generalized sequence operations"
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{ $subsection narray }
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{ $subsection nsequence }
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{ $subsection firstn }
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{ $subsection nappend }
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{ $subsection nappend-as } ;
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ARTICLE: "shuffle-generalizations" "Generalized shuffle words"
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{ $subsection ndup }
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{ $subsection npick }
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{ $subsection nrot }
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{ $subsection -nrot }
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{ $subsection nnip }
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{ $subsection ndrop }
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{ $subsection ntuck }
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{ $subsection mnswap }
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{ $subsection nweave } ;
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ARTICLE: "combinator-generalizations" "Generalized combinators"
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{ $subsection ndip }
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{ $subsection nkeep }
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{ $subsection napply }
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{ $subsection ncleave }
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{ $subsection nspread } ;
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ARTICLE: "other-generalizations" "Additional generalizations"
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{ $subsection ncurry }
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{ $subsection nwith }
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{ $subsection nsum } ;
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ARTICLE: "generalizations" "Generalized shuffle words and combinators"
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"The " { $vocab-link "generalizations" } " vocabulary defines a number of stack shuffling words and combinators for use in "
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"macros where the arity of the input quotations depends on an "
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"input parameter."
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{ $subsection "sequence-generalizations" }
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{ $subsection "shuffle-generalizations" }
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{ $subsection "combinator-generalizations" }
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{ $subsection "other-generalizations" } ;
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ABOUT: "generalizations"
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