mirror of
https://github.com/nim-lang/Nim.git
synced 2025-12-28 08:54:53 +00:00
efd5c571bf
* .forbids pragma: defining illegal effects for proc types This patch intends to define the opposite of the .tags pragma: a way to define effects which are not allowed in a proc. * updated documentation and changelogs for the forbids pragma * renamed notTagEffects to forbiddenEffects * corrected issues of forbids pragma the forbids pragma didn't handle simple restrictions properly and it also had issues with subtyping * removed incorrect character from changelog * added test to cover the interaction of methods and the forbids pragma * covering the interaction of the tags and forbids pragmas * updated manual about the forbids pragma * removed useless statement * corrected the subtyping of proc types using the forbids pragma * updated manual for the forbids pragma * updated documentations for forbids pragma * updated nim docs * updated docs with rsttester.nim * regenerated documentation * updated rst docs * Update changelog.md Co-authored-by: ringabout <43030857+ringabout@users.noreply.github.com> * updated changelog * corrected typo Co-authored-by: ringabout <43030857+ringabout@users.noreply.github.com>
18 lines
501 B
Nim
18 lines
501 B
Nim
discard """
|
|
action: compile
|
|
errormsg: "writeSomething(\"a\") has an illegal effect: WriteIO"
|
|
line: 17
|
|
"""
|
|
|
|
type
|
|
IO = object of RootEffect ## input/output effect
|
|
ReadIO = object of IO ## input effect
|
|
WriteIO = object of IO ## output effect
|
|
|
|
proc readSomething(): string {.tags: [ReadIO].} = ""
|
|
proc writeSomething(msg: string): void {.tags: [WriteIO].} = echo msg
|
|
|
|
proc illegalEffectNegation() {.forbids: [WriteIO], tags: [ReadIO, WriteIO].} =
|
|
echo readSomething()
|
|
writeSomething("a")
|