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# A list links up multiple objects together to make them easier to manage.
#
# The objects must be of the same type. If you want to store multiple types in
# a single list, use an exclusive-container.
container list:_elem [
value:_elem
next:address:list:_elem
]
recipe push x:_elem, in:address:list:_elem -> result:address:list:_elem [
local-scope
load-ingredients
result <- new {(list _elem): type}
val:address:_elem <- get-address *result, value:offset
*val <- copy x
next:address:address:list:_elem <- get-address *result, next:offset
*next <- copy in
reply result
]
recipe first in:address:list:_elem -> result:_elem [
local-scope
load-ingredients
result <- get *in, value:offset
]
# result:address:list <- rest in:address:list
recipe rest in:address:list:_elem -> result:address:list:_elem [
local-scope
load-ingredients
result <- get *in, next:offset
]
scenario list-handling [
run [
1:address:list:number <- push 3, 0
1:address:list:number <- push 4, 1:address:list:number
1:address:list:number <- push 5, 1:address:list:number
2:number <- first 1:address:list:number
1:address:list:number <- rest 1:address:list:number
3:number <- first 1:address:list:number
1:address:list:number <- rest 1:address:list:number
4:number <- first 1:address:list:number
1:address:list:number <- rest 1:address:list:number
]
memory-should-contain [
1 <- 0 # empty to empty, dust to dust..
2 <- 5
3 <- 4
4 <- 3
]
]
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