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deprecated list comprehension (#10636)

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Arne Döring
2019-02-12 08:10:40 +01:00
committed by Andreas Rumpf
parent 33ddc21057
commit c59fa80367
1 changed files with 4 additions and 3 deletions
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7
lib/pure/sugar.nim
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@@ -123,11 +123,11 @@ macro `->`*(p, b: untyped): untyped =
result = createProcType(p, b)
type ListComprehension = object
var lc*: ListComprehension
var lc* {.deprecated.}: ListComprehension
template `|`*(lc: ListComprehension, comp: untyped): untyped = lc
template `|`*(lc: ListComprehension, comp: untyped): untyped {.deprecated.} = lc
macro `[]`*(lc: ListComprehension, comp, typ: untyped): untyped =
macro `[]`*(lc: ListComprehension, comp, typ: untyped): untyped {.deprecated.} =
## List comprehension, returns a sequence. `comp` is the actual list
## comprehension, for example ``x | (x <- 1..10, x mod 2 == 0)``. `typ` is
## the type that will be stored inside the result seq.
@@ -139,6 +139,7 @@ macro `[]`*(lc: ListComprehension, comp, typ: untyped): untyped =
## const n = 20
## echo lc[(x,y,z) | (x <- 1..n, y <- x..n, z <- y..n, x*x + y*y == z*z),
## tuple[a,b,c: int]]
## **Deprecated since version 0.19.9**
expectLen(comp, 3)
expectKind(comp, nnkInfix)