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authorMatthew Wild <mwild1@gmail.com>2018-10-18 12:11:50 +0100
committerMatthew Wild <mwild1@gmail.com>2018-10-18 12:11:50 +0100
commit7bcf751702cfc10ad5946c9ed54784c95653441f (patch)
tree04f24e8f527e1eaa6090455ea8f7bb43ab9de5d4
parent0d3fa64b961586d70bbf9b9eb3e417687f6872d6 (diff)
downloadprosody-7bcf751702cfc10ad5946c9ed54784c95653441f.tar.gz
prosody-7bcf751702cfc10ad5946c9ed54784c95653441f.zip
util.promise: Also support automatic resolution by returning a promise from an on_reject handler
Originally unimplemented because it wasn't clear to me what the correct behaviour was, but the A+ spec is clear that both onFulfilled and onRejected may return a promise.
-rw-r--r--util/promise.lua4
1 files changed, 3 insertions, 1 deletions
diff --git a/util/promise.lua b/util/promise.lua
index 1f48eb9f..2583baa2 100644
--- a/util/promise.lua
+++ b/util/promise.lua
@@ -46,7 +46,9 @@ local function new_resolve_functions(p)
local function _reject(e)
if resolved then return; end
resolved = true;
- if promise_settle(p, "rejected", next_rejected, p._pending_on_rejected, e) then
+ if is_promise(e) then
+ e:next(new_resolve_functions(p));
+ elseif promise_settle(p, "rejected", next_rejected, p._pending_on_rejected, e) then
p.reason = e;
end
end