How to run nested async functions? #395
Description
I'm having trouble figuring out how I can nest async.wrap function calls.
What seems to be working is:
local leaf1 = async.wrap(function(cb)
cb("leaf1")
end, 1)
local leaf2 = async.wrap(function(cb)
cb("leaf2")
end, 1)
local branch = async.wrap(function(cb)
local l1,l2
async.run(leaf1, function(val)
l1 = val
end)
async.run(leaf2, function(val)
l2 = val
end)
cb("branch" .. l1 .. l2)
end, 1)
function run()
local root = async.void(function()
print(leaf1())
print(leaf2())
print(branch())
end)
root()
end
run()I expected plain function calls to work, but they crash with an error:
local leaf1 = async.wrap(function(cb)
cb("leaf1")
end, 1)
local leaf2 = async.wrap(function(cb)
cb("leaf2")
end, 1)
local branch = async.wrap(function(cb)
local l1,l2
l1 = leaf1()
l2 = leaf2()
cb("branch" .. l1 .. l2)
end, 1)
M.async = function()
local root = async.void(function()
print(leaf1())
print(leaf2())
print(branch())
end)
root()
endError:
attempt to yield across C-call boundary