98 lines
2.2 KiB
Lua
98 lines
2.2 KiB
Lua
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function printrunning()
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if coroutine.running() == nil then
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print("running is nil");
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else
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print("running is not nil")
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end
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end
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function foo (a)
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print("foo", a)
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return coroutine.yield(2*a)
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end
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co = coroutine.create(function (a,b)
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print("co-body", a, b)
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local r = foo(a+1)
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print("co-body", r)
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local r, s = coroutine.yield(a+b, a-b)
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print("co-body", r, s)
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printrunning()
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print("co.status.inside",coroutine.status(co));
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local co2 = coroutine.create(function()
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print("co.status.inside2",coroutine.status(co));
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end)
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print("co.status.inside",coroutine.status(co));
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coroutine.resume(co2);
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return b, "end"
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end)
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function exercise()
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printrunning()
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print("co.status",coroutine.status(co));
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print("main", coroutine.resume(co, 1, 10))
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print("co.status",coroutine.status(co));
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print("main", coroutine.resume(co, "r"))
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print("co.status",coroutine.status(co));
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print("main", coroutine.resume(co, "x", "y"))
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print("co.status",coroutine.status(co));
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print("main", coroutine.resume(co, "x", "y"))
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print("co.status",coroutine.status(co));
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end
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exercise();
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co = coroutine.create(function (a,b)
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print("co-body", a, b)
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-- TODO: make java and C behave the same for yielding in pcalls
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-- local status,r = pcall( foo, a+1 )
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foo(a+1)
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print("co-body", status,r)
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local r, s = coroutine.yield(a+b, a-b)
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print("co-body", r, s)
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return b, "end"
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end)
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exercise();
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-- wrap test
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local g = coroutine.wrap(function (a,b)
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print("co-body", a, b)
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local r = foo(a+1)
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print("co-body", r)
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local r, s = coroutine.yield(a+b, a-b)
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print("co-body", r, s)
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return b, "end"
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end )
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print("g", g(1, 10))
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print("g", g("r"))
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print("g", g("x", "y"))
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local s,e = pcall( g, "x", "y" )
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print("g", string.match(e,'cannot resume dead coroutine') or 'badmessage: '..tostring(e))
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-- varargs passing
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local echo = function(msg,...)
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print( msg, ...)
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return ...
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end
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local echocr = function(...)
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echo('(echocr) first args', unpack(arg,1,arg.n))
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local a = arg
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while true do
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a = { echo( '(echoch) yield returns', coroutine.yield( unpack(a) ) ) }
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end
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end
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local c = coroutine.create( echocr )
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local step = function(...)
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echo( '(main) resume returns',
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coroutine.resume(c, echo('(main) sending args', ...)) )
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end
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step(111,222,333)
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step()
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step(111)
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step(111,222,333)
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