Add a parsing word to output slots to the stack instead of to an array

db4
Doug Coleman 2010-03-02 04:51:52 -06:00
parent b059ade5ed
commit 3faa1a57d3
3 changed files with 21 additions and 1 deletions

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@ -3,6 +3,16 @@
USING: help.markup help.syntax ;
IN: slots.syntax
HELP: slots[
{ $description "Outputs several slot values to the stack." }
{ $example "USING: kernel prettyprint slots.syntax ;"
"IN: slots.syntax.example"
"TUPLE: rectangle width height ;"
"T{ rectangle { width 3 } { height 5 } } slots[ width height ] [ . ] bi@"
"""3
5"""
} ;
HELP: slots{
{ $description "Outputs an array of slot values from a tuple." }
{ $example "USING: prettyprint slots.syntax ;"
@ -14,6 +24,8 @@ HELP: slots{
ARTICLE: "slots.syntax" "Slots syntax sugar"
"The " { $vocab-link "slots.syntax" } " vocabulary provides an alternative syntax for taking a sequence of slots from a tuple." $nl
"Syntax sugar for cleaving slots to the stack:"
{ $subsections POSTPONE: slots[ }
"Syntax sugar for cleaving slots to an array:"
{ $subsections POSTPONE: slots{ } ;

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@ -5,6 +5,10 @@ IN: slots.syntax.tests
TUPLE: slot-test a b c ;
[ 1 2 3 ] [ T{ slot-test f 1 2 3 } slots[ a b c ] ] unit-test
[ 3 ] [ T{ slot-test f 1 2 3 } slots[ c ] ] unit-test
[ ] [ T{ slot-test f 1 2 3 } slots[ ] ] unit-test
[ { 1 2 3 } ] [ T{ slot-test f 1 2 3 } slots{ a b c } ] unit-test
[ { 3 } ] [ T{ slot-test f 1 2 3 } slots{ c } ] unit-test
[ { } ] [ T{ slot-test f 1 2 3 } slots{ } ] unit-test
[ { } ] [ 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
sequences slots ;
IN: slots.syntax
SYNTAX: slots[
"]" [ reader-word 1quotation ] map-tokens
'[ _ cleave ] append! ;
SYNTAX: slots{
"}" [ reader-word 1quotation ] map-tokens
'[ [ _ cleave ] output>array ] append! ;