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author | Juan Carlos <juancarlospaco@gmail.com> | 2022-02-25 11:34:16 -0800 |
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committer | GitHub <noreply@github.com> | 2022-02-25 20:34:16 +0100 |
commit | f0bfc0bd3f619c0933df5b71a0a04d4181d99880 (patch) | |
tree | a79b8a72c39b310a180a6f5b01a29757b0650a7d /lib/js | |
parent | 9c17a32e0ec45de83c21d84f98be7f351ccd1172 (diff) | |
download | Nim-f0bfc0bd3f619c0933df5b71a0a04d4181d99880.tar.gz |
Remove define for jsfetch (#19530)
* Remove define nimExperimentalAsyncjsThen for std/asyncjs.then and std/jsfetch * Remove define nimExperimentalAsyncjsThen for std/asyncjs.then and std/jsfetch * Remove define nimExperimentalAsyncjsThen for std/asyncjs.then and std/jsfetch * Remove define nimExperimentalAsyncjsThen for std/asyncjs.then and std/jsfetch
Diffstat (limited to 'lib/js')
-rw-r--r-- | lib/js/asyncjs.nim | 176 |
1 files changed, 88 insertions, 88 deletions
diff --git a/lib/js/asyncjs.nim b/lib/js/asyncjs.nim index 861fe3fe2..8f91e1acd 100644 --- a/lib/js/asyncjs.nim +++ b/lib/js/asyncjs.nim @@ -64,6 +64,7 @@ when not defined(js) and not defined(nimsuggest): import std/jsffi import std/macros +import std/private/since type Future*[T] = ref object @@ -163,92 +164,91 @@ template maybeFuture(T): untyped = when T is Future: T else: Future[T] -when defined(nimExperimentalAsyncjsThen): - import std/private/since - since (1, 5, 1): - #[ - TODO: - * map `Promise.all()` - * proc toString*(a: Error): cstring {.importjs: "#.toString()".} - - Note: - We probably can't have a `waitFor` in js in browser (single threaded), but maybe it would be possible - in in nodejs, see https://nodejs.org/api/child_process.html#child_process_child_process_execsync_command_options - and https://stackoverflow.com/questions/61377358/javascript-wait-for-async-call-to-finish-before-returning-from-function-witho - ]# - - type Error* {.importjs: "Error".} = ref object of JsRoot - ## https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error - message*: cstring - name*: cstring - - type OnReject* = proc(reason: Error) - - proc then*[T](future: Future[T], onSuccess: proc, onReject: OnReject = nil): auto = - ## See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/then - ## Returns a `Future` from the return type of `onSuccess(T.default)`. - runnableExamples("-d:nimExperimentalAsyncjsThen"): - from std/sugar import `=>` - - proc fn(n: int): Future[int] {.async.} = - if n >= 7: raise newException(ValueError, "foobar: " & $n) - else: result = n * 2 - - proc asyncFact(n: int): Future[int] {.async.} = - if n > 0: result = n * await asyncFact(n-1) - else: result = 1 - - proc main() {.async.} = - block: # then - assert asyncFact(3).await == 3*2 - assert asyncFact(3).then(asyncFact).await == 6*5*4*3*2 - let x1 = await fn(3) - assert x1 == 3 * 2 - let x2 = await fn(4) - .then((a: int) => a.float) - .then((a: float) => $a) - assert x2 == "8.0" - - block: # then with `onReject` callback - var witness = 1 - await fn(6).then((a: int) => (witness = 2), (r: Error) => (witness = 3)) - assert witness == 2 - await fn(7).then((a: int) => (witness = 2), (r: Error) => (witness = 3)) - assert witness == 3 - - template impl(call): untyped = - # see D20210421T014713 - when typeof(block: call) is void: - var ret: Future[void] - else: - var ret = default(maybeFuture(typeof(call))) - typeof(ret) - when T is void: - type A = impl(onSuccess()) + +since (1, 5, 1): + #[ + TODO: + * map `Promise.all()` + * proc toString*(a: Error): cstring {.importjs: "#.toString()".} + + Note: + We probably can't have a `waitFor` in js in browser (single threaded), but maybe it would be possible + in in nodejs, see https://nodejs.org/api/child_process.html#child_process_child_process_execsync_command_options + and https://stackoverflow.com/questions/61377358/javascript-wait-for-async-call-to-finish-before-returning-from-function-witho + ]# + + type Error* {.importjs: "Error".} = ref object of JsRoot + ## https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error + message*: cstring + name*: cstring + + type OnReject* = proc(reason: Error) + + proc then*[T](future: Future[T], onSuccess: proc, onReject: OnReject = nil): auto = + ## See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/then + ## Returns a `Future` from the return type of `onSuccess(T.default)`. + runnableExamples("-r:off"): + from std/sugar import `=>` + + proc fn(n: int): Future[int] {.async.} = + if n >= 7: raise newException(ValueError, "foobar: " & $n) + else: result = n * 2 + + proc asyncFact(n: int): Future[int] {.async.} = + if n > 0: result = n * await asyncFact(n-1) + else: result = 1 + + proc main() {.async.} = + block: # then + assert asyncFact(3).await == 3*2 + assert asyncFact(3).then(asyncFact).await == 6*5*4*3*2 + let x1 = await fn(3) + assert x1 == 3 * 2 + let x2 = await fn(4) + .then((a: int) => a.float) + .then((a: float) => $a) + assert x2 == "8.0" + + block: # then with `onReject` callback + var witness = 1 + await fn(6).then((a: int) => (witness = 2), (r: Error) => (witness = 3)) + assert witness == 2 + await fn(7).then((a: int) => (witness = 2), (r: Error) => (witness = 3)) + assert witness == 3 + + template impl(call): untyped = + # see D20210421T014713 + when typeof(block: call) is void: + var ret: Future[void] else: - type A = impl(onSuccess(default(T))) - var ret: A - asm "`ret` = `future`.then(`onSuccess`, `onReject`)" - return ret - - proc catch*[T](future: Future[T], onReject: OnReject): Future[void] = - ## See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/catch - runnableExamples("-d:nimExperimentalAsyncjsThen"): - from std/sugar import `=>` - from std/strutils import contains - - proc fn(n: int): Future[int] {.async.} = - if n >= 7: raise newException(ValueError, "foobar: " & $n) - else: result = n * 2 - - proc main() {.async.} = - var reason: Error - await fn(6).catch((r: Error) => (reason = r)) # note: `()` are needed, `=> reason = r` would not work - assert reason == nil - await fn(7).catch((r: Error) => (reason = r)) - assert reason != nil - assert "foobar: 7" in $reason.message - - discard main() - - asm "`result` = `future`.catch(`onReject`)" + var ret = default(maybeFuture(typeof(call))) + typeof(ret) + when T is void: + type A = impl(onSuccess()) + else: + type A = impl(onSuccess(default(T))) + var ret: A + asm "`ret` = `future`.then(`onSuccess`, `onReject`)" + return ret + + proc catch*[T](future: Future[T], onReject: OnReject): Future[void] = + ## See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/catch + runnableExamples("-r:off"): + from std/sugar import `=>` + from std/strutils import contains + + proc fn(n: int): Future[int] {.async.} = + if n >= 7: raise newException(ValueError, "foobar: " & $n) + else: result = n * 2 + + proc main() {.async.} = + var reason: Error + await fn(6).catch((r: Error) => (reason = r)) # note: `()` are needed, `=> reason = r` would not work + assert reason == nil + await fn(7).catch((r: Error) => (reason = r)) + assert reason != nil + assert "foobar: 7" in $reason.message + + discard main() + + asm "`result` = `future`.catch(`onReject`)" |