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1279 lines (1056 loc) · 34.4 KB
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-- $Id: testes/coroutine.lua $
-- See Copyright Notice in file lua.h
print "testing coroutines"
local debug = require'debug'
local f
local main, ismain = coroutine.running()
assert(type(main) == "thread" and ismain)
assert(not coroutine.resume(main))
assert(not coroutine.isyieldable(main) and not coroutine.isyieldable())
assert(not pcall(coroutine.yield))
-- trivial errors
assert(not pcall(coroutine.resume, 0))
assert(not pcall(coroutine.status, 0))
-- tests for multiple yield/resume arguments
local function eqtab (t1, t2)
assert(#t1 == #t2)
for i = 1, #t1 do
local v = t1[i]
assert(t2[i] == v)
end
end
_G.x = nil -- declare x
_G.f = nil -- declare f
local function foo (a, ...)
local x, y = coroutine.running()
assert(x == f and y == false)
-- next call should not corrupt coroutine (but must fail,
-- as it attempts to resume the running coroutine)
assert(coroutine.resume(f) == false)
assert(coroutine.status(f) == "running")
local arg = {...}
assert(coroutine.isyieldable(x))
for i=1,#arg do
_G.x = {coroutine.yield(table.unpack(arg[i]))}
end
return table.unpack(a)
end
f = coroutine.create(foo)
assert(coroutine.isyieldable(f))
assert(type(f) == "thread" and coroutine.status(f) == "suspended")
assert(string.find(tostring(f), "thread"))
local s,a,b,c,d
s,a,b,c,d = coroutine.resume(f, {1,2,3}, {}, {1}, {'a', 'b', 'c'})
assert(coroutine.isyieldable(f))
assert(s and a == nil and coroutine.status(f) == "suspended")
s,a,b,c,d = coroutine.resume(f)
eqtab(_G.x, {})
assert(s and a == 1 and b == nil)
assert(coroutine.isyieldable(f))
s,a,b,c,d = coroutine.resume(f, 1, 2, 3)
eqtab(_G.x, {1, 2, 3})
assert(s and a == 'a' and b == 'b' and c == 'c' and d == nil)
s,a,b,c,d = coroutine.resume(f, "xuxu")
eqtab(_G.x, {"xuxu"})
assert(s and a == 1 and b == 2 and c == 3 and d == nil)
assert(coroutine.status(f) == "dead")
s, a = coroutine.resume(f, "xuxu")
assert(not s and string.find(a, "dead") and coroutine.status(f) == "dead")
_G.f = nil
-- yields in tail calls
local function foo (i) return coroutine.yield(i) end
local f = coroutine.wrap(function ()
for i=1,10 do
assert(foo(i) == _G.x)
end
return 'a'
end)
for i=1,10 do _G.x = i; assert(f(i) == i) end
_G.x = 'xuxu'; assert(f('xuxu') == 'a')
_G.x = nil
-- recursive
local function pf (n, i)
coroutine.yield(n)
pf(n*i, i+1)
end
f = coroutine.wrap(pf)
local s=1
for i=1,10 do
assert(f(1, 1) == s)
s = s*i
end
-- sieve
local function gen (n)
return coroutine.wrap(function ()
for i=2,n do coroutine.yield(i) end
end)
end
local function filter (p, g)
return coroutine.wrap(function ()
while 1 do
local n = g()
if n == nil then return end
if math.fmod(n, p) ~= 0 then coroutine.yield(n) end
end
end)
end
local x = gen(80)
local a = {}
while 1 do
local n = x()
if n == nil then break end
table.insert(a, n)
x = filter(n, x)
end
assert(#a == 22 and a[#a] == 79)
x, a = nil
do -- "bug" in 5.4.2
local function foo () foo () end -- just create a stack overflow
local co = coroutine.create(foo)
-- running this coroutine would overflow the unsigned short 'nci', the
-- counter of CallInfo structures available to the thread.
-- (The issue only manifests in an 'assert'.)
local st, msg = coroutine.resume(co)
assert(string.find(msg, "stack overflow"))
assert(coroutine.status(co) == "dead")
end
print("to-be-closed variables in coroutines")
local function func2close (f)
return setmetatable({}, {__close = f})
end
do
-- ok to close a dead coroutine
local co = coroutine.create(print)
assert(coroutine.resume(co, "testing 'coroutine.close'"))
assert(coroutine.status(co) == "dead")
local st, msg = coroutine.close(co)
assert(st and msg == nil)
-- also ok to close it again
st, msg = coroutine.close(co)
assert(st and msg == nil)
-- cannot close 'main'
local st, msg = pcall(coroutine.close, main);
assert(not st and string.find(msg, "main"))
-- cannot close a "normal" coroutine
;(coroutine.wrap(function ()
local st, msg = pcall(coroutine.close, main)
assert(not st and string.find(msg, "normal"))
end))()
do -- close a coroutine while closing it
local co
co = coroutine.create(
function()
local x <close> = func2close(function()
coroutine.close(co) -- close it again
end)
coroutine.yield(20)
end)
local st, msg = coroutine.resume(co)
assert(st and msg == 20)
st, msg = coroutine.close(co)
assert(st and msg == nil)
end
do
-- again close a coroutine while closing it, but with the
-- coroutine in error mode.
-- after the error, the function created by 'wrap' will close the
-- coroutine. The close inside 'a' overrides the original close
-- and finishes the coroutine with no errors.
local co = coroutine.wrap(function()
local a <close> = func2close(function()
coroutine.close()
end)
error("y")
end)
co() -- no errors
end
-- to-be-closed variables in coroutines
local X
-- closing a coroutine after an error
local co = coroutine.create(error)
local st, msg = coroutine.resume(co, 100)
assert(not st and msg == 100)
st, msg = coroutine.close(co)
assert(not st and msg == 100)
-- after closing, no more errors
st, msg = coroutine.close(co)
assert(st and msg == nil)
co = coroutine.create(function ()
local x <close> = func2close(function (self, err)
assert(err == nil); X = false
end)
X = true
coroutine.yield()
end)
coroutine.resume(co)
assert(X)
assert(coroutine.close(co))
assert(not X and coroutine.status(co) == "dead")
-- error closing a coroutine
local x = 0
co = coroutine.create(function()
local y <close> = func2close(function (self,err)
assert(err == 111)
x = 200
error(200)
end)
local x <close> = func2close(function (self, err)
assert(err == nil); error(111)
end)
coroutine.yield()
end)
coroutine.resume(co)
assert(x == 0)
local st, msg = coroutine.close(co)
assert(st == false and coroutine.status(co) == "dead" and msg == 200)
assert(x == 200)
-- after closing, no more errors
st, msg = coroutine.close(co)
assert(st and msg == nil)
end
do
-- <close> versus pcall in coroutines
local X = false
local Y = false
local function foo ()
local x <close> = func2close(function (self, err)
Y = debug.getinfo(2)
X = err
end)
error(43)
end
local co = coroutine.create(function () return pcall(foo) end)
local st1, st2, err = coroutine.resume(co)
assert(st1 and not st2 and err == 43)
assert(X == 43 and Y.what == "C")
-- recovering from errors in __close metamethods
local track = {}
local function h (o)
local hv <close> = o
return 1
end
local function foo ()
local x <close> = func2close(function(_,msg)
track[#track + 1] = msg or false
error(20)
end)
local y <close> = func2close(function(_,msg)
track[#track + 1] = msg or false
return 1000
end)
local z <close> = func2close(function(_,msg)
track[#track + 1] = msg or false
error(10)
end)
coroutine.yield(1)
h(func2close(function(_,msg)
track[#track + 1] = msg or false
error(2)
end))
end
local co = coroutine.create(pcall)
local st, res = coroutine.resume(co, foo) -- call 'foo' protected
assert(st and res == 1) -- yield 1
local st, res1, res2 = coroutine.resume(co) -- continue
assert(coroutine.status(co) == "dead")
assert(st and not res1 and res2 == 20) -- last error (20)
assert(track[1] == false and track[2] == 2 and track[3] == 10 and
track[4] == 10)
end
do print("coroutines closing itself")
global <const> coroutine, string, os
global <const> assert, error, pcall
local X = nil
local function new ()
return coroutine.create(function (what)
local <close>var = func2close(function (t, err)
if what == "yield" then
coroutine.yield()
elseif what == "error" then
error(200)
else
X = "Ok"
return X
end
end)
-- do an unprotected call so that coroutine becomes non-yieldable
string.gsub("a", "a", function ()
assert(not coroutine.isyieldable())
-- do protected calls while non-yieldable, to add recovery
-- entries (setjmp) to the stack
assert(pcall(pcall, function ()
-- 'close' works even while non-yieldable
coroutine.close() -- close itself
os.exit(false) -- not reacheable
end))
end)
end)
end
local co = new()
local st, msg = coroutine.resume(co, "ret")
assert(st and msg == nil)
assert(X == "Ok")
local co = new()
local st, msg = coroutine.resume(co, "error")
assert(not st and msg == 200)
local co = new()
local st, msg = coroutine.resume(co, "yield")
assert(not st and string.find(msg, "attempt to yield"))
end
-- yielding across C boundaries
local co = coroutine.wrap(function()
assert(not pcall(table.sort,{1,2,3}, coroutine.yield))
assert(coroutine.isyieldable())
coroutine.yield(20)
return 30
end)
assert(co() == 20)
assert(co() == 30)
local f = function (s, i) return coroutine.yield(i) end
local f1 = coroutine.wrap(function ()
return xpcall(pcall, function (...) return ... end,
function ()
local s = 0
for i in f, nil, 1 do pcall(function () s = s + i end) end
error({s})
end)
end)
f1()
for i = 1, 10 do assert(f1(i) == i) end
local r1, r2, v = f1(nil)
assert(r1 and not r2 and v[1] == (10 + 1)*10/2)
local function f (a, b) a = coroutine.yield(a); error{a + b} end
local function g(x) return x[1]*2 end
co = coroutine.wrap(function ()
coroutine.yield(xpcall(f, g, 10, 20))
end)
assert(co() == 10)
local r, msg = co(100)
assert(not r and msg == 240)
-- unyieldable C call
do
local function f (c)
assert(not coroutine.isyieldable())
return c .. c
end
local co = coroutine.wrap(function (c)
assert(coroutine.isyieldable())
local s = string.gsub("a", ".", f)
return s
end)
assert(co() == "aa")
end
do -- testing single trace of coroutines
local X
local co = coroutine.create(function ()
coroutine.yield(10)
return 20;
end)
local trace = {}
local function dotrace (event)
trace[#trace + 1] = event
end
debug.sethook(co, dotrace, "clr")
repeat until not coroutine.resume(co)
local correcttrace = {"call", "line", "call", "return", "line", "return"}
assert(#trace == #correcttrace)
for k, v in pairs(trace) do
assert(v == correcttrace[k])
end
end
-- errors in coroutines
function foo ()
assert(debug.getinfo(1).currentline == debug.getinfo(foo).linedefined + 1)
assert(debug.getinfo(2).currentline == debug.getinfo(goo).linedefined)
coroutine.yield(3)
error(foo)
end
function goo() foo() end
x = coroutine.wrap(goo)
assert(x() == 3)
local a,b = pcall(x)
assert(not a and b == foo)
x = coroutine.create(goo)
a,b = coroutine.resume(x)
assert(a and b == 3)
a,b = coroutine.resume(x)
assert(not a and b == foo and coroutine.status(x) == "dead")
a,b = coroutine.resume(x)
assert(not a and string.find(b, "dead") and coroutine.status(x) == "dead")
goo = nil
-- co-routines x for loop
local function all (a, n, k)
if k == 0 then coroutine.yield(a)
else
for i=1,n do
a[k] = i
all(a, n, k-1)
end
end
end
local a = 0
for t in coroutine.wrap(function () all({}, 5, 4) end) do
a = a+1
end
assert(a == 5^4)
-- access to locals of collected corroutines
local C = {}; setmetatable(C, {__mode = "kv"})
local x = coroutine.wrap (function ()
local a = 10
local function f () a = a+10; return a end
while true do
a = a+1
coroutine.yield(f)
end
end)
C[1] = x;
local f = x()
assert(f() == 21 and x()() == 32 and x() == f)
x = nil
collectgarbage()
assert(C[1] == undef)
assert(f() == 43 and f() == 53)
-- old bug: attempt to resume itself
local function co_func (current_co)
assert(coroutine.running() == current_co)
assert(coroutine.resume(current_co) == false)
coroutine.yield(10, 20)
assert(coroutine.resume(current_co) == false)
coroutine.yield(23)
return 10
end
local co = coroutine.create(co_func)
local a,b,c = coroutine.resume(co, co)
assert(a == true and b == 10 and c == 20)
a,b = coroutine.resume(co, co)
assert(a == true and b == 23)
a,b = coroutine.resume(co, co)
assert(a == true and b == 10)
assert(coroutine.resume(co, co) == false)
assert(coroutine.resume(co, co) == false)
-- other old bug when attempting to resume itself
-- (trigger C-code assertions)
do
local A = coroutine.running()
local B = coroutine.create(function() return coroutine.resume(A) end)
local st, res = coroutine.resume(B)
assert(st == true and res == false)
local X = false
A = coroutine.wrap(function()
local _ <close> = func2close(function () X = true end)
return pcall(A, 1)
end)
st, res = A()
assert(not st and string.find(res, "non%-suspended") and X == true)
end
-- bug in 5.4.1
do
-- coroutine ran close metamethods with invalid status during a
-- reset.
local co
co = coroutine.wrap(function()
local x <close> = func2close(function() return pcall(co) end)
error(111)
end)
local st, errobj = pcall(co)
assert(not st and errobj == 111)
st, errobj = pcall(co)
assert(not st and string.find(errobj, "dead coroutine"))
end
-- attempt to resume 'normal' coroutine
local co1, co2
co1 = coroutine.create(function () return co2() end)
co2 = coroutine.wrap(function ()
assert(coroutine.status(co1) == 'normal')
assert(not coroutine.resume(co1))
coroutine.yield(3)
end)
a,b = coroutine.resume(co1)
assert(a and b == 3)
assert(coroutine.status(co1) == 'dead')
-- infinite recursion of coroutines
a = function(a) coroutine.wrap(a)(a) end
assert(not pcall(a, a))
a = nil
do
-- bug in 5.4: thread can use message handler higher in the stack
-- than the variable being closed
local c = coroutine.create(function()
local clo <close> = setmetatable({}, {__close=function()
local x = 134 -- will overwrite message handler
error(x)
end})
-- yields coroutine but leaves a new message handler for it,
-- that would be used when closing the coroutine (except that it
-- will be overwritten)
xpcall(coroutine.yield, function() return "XXX" end)
end)
assert(coroutine.resume(c)) -- start coroutine
local st, msg = coroutine.close(c)
assert(not st and msg == 134)
end
-- access to locals of erroneous coroutines
local x = coroutine.create (function ()
local a = 10
_G.F = function () a=a+1; return a end
error('x')
end)
assert(not coroutine.resume(x))
-- overwrite previous position of local `a'
assert(not coroutine.resume(x, 1, 1, 1, 1, 1, 1, 1))
assert(_G.F() == 11)
assert(_G.F() == 12)
_G.F = nil
if not T then
(Message or print)
('\n >>> testC not active: skipping coroutine API tests <<<\n')
else
print "testing yields inside hooks"
local turn
local function fact (t, x)
assert(turn == t)
if x == 0 then return 1
else return x*fact(t, x-1)
end
end
local A, B = 0, 0
local x = coroutine.create(function ()
T.sethook("yield 0", "", 2)
A = fact("A", 6)
end)
local y = coroutine.create(function ()
T.sethook("yield 0", "", 3)
B = fact("B", 7)
end)
while A==0 or B==0 do -- A ~= 0 when 'x' finishes (similar for 'B','y')
if A==0 then turn = "A"; assert(T.resume(x)) end
if B==0 then turn = "B"; assert(T.resume(y)) end
-- check that traceback works correctly after yields inside hooks
debug.traceback(x)
debug.traceback(y)
end
assert(B // A == 7) -- fact(7) // fact(6)
do -- hooks vs. multiple values
local done
local function test (n)
done = false
return coroutine.wrap(function ()
local a = {}
for i = 1, n do a[i] = i end
-- 'pushint' just to perturb the stack
T.sethook("pushint 10; yield 0", "", 1) -- yield at each op.
local a1 = {table.unpack(a)} -- must keep top between ops.
assert(#a1 == n)
for i = 1, n do assert(a[i] == i) end
done = true
end)
end
-- arguments to the coroutine are just to perturb its stack
local co = test(0); while not done do co(30) end
co = test(1); while not done do co(20, 10) end
co = test(3); while not done do co() end
co = test(100); while not done do co() end
end
local line = debug.getinfo(1, "l").currentline + 2 -- get line number
local function foo ()
local x = 10 --<< this line is 'line'
x = x + 10
_G.XX = x
end
-- testing yields in line hook
local co = coroutine.wrap(function ()
T.sethook("setglobal X; yield 0", "l", 0); foo(); return 10 end)
_G.XX = nil;
_G.X = nil; co(); assert(_G.X == line)
_G.X = nil; co(); assert(_G.X == line + 1)
_G.X = nil; co(); assert(_G.X == line + 2 and _G.XX == nil)
_G.X = nil; co(); assert(_G.X == line + 3 and _G.XX == 20)
assert(co() == 10)
_G.X = nil
-- testing yields in count hook
co = coroutine.wrap(function ()
T.sethook("yield 0", "", 1); foo(); return 10 end)
_G.XX = nil;
local c = 0
repeat c = c + 1; local a = co() until a == 10
assert(_G.XX == 20 and c >= 5)
co = coroutine.wrap(function ()
T.sethook("yield 0", "", 2); foo(); return 10 end)
_G.XX = nil;
local c = 0
repeat c = c + 1; local a = co() until a == 10
assert(_G.XX == 20 and c >= 5)
_G.X = nil; _G.XX = nil
do
-- testing debug library on a coroutine suspended inside a hook
-- (bug in 5.2/5.3)
c = coroutine.create(function (a, ...)
T.sethook("yield 0", "l") -- will yield on next two lines
local b = a
return ...
end)
assert(coroutine.resume(c, 1, 2, 3)) -- start coroutine
local n,v = debug.getlocal(c, 0, 1) -- check its local
assert(n == "a" and v == 1 and debug.getlocal(c, 0, 2) ~= "b")
assert(debug.setlocal(c, 0, 1, 10)) -- test 'setlocal'
local t = debug.getinfo(c, 0) -- test 'getinfo'
assert(t.currentline == t.linedefined + 2)
assert(not debug.getinfo(c, 1)) -- no other level
assert(coroutine.resume(c)) -- run next line
local n,v = debug.getlocal(c, 0, 2) -- check vararg table
assert(n == "(vararg table)" and v == nil)
local n,v = debug.getlocal(c, 0, 3) -- check next local
assert(n == "b" and v == 10)
v = {coroutine.resume(c)} -- finish coroutine
assert(v[1] == true and v[2] == 2 and v[3] == 3 and v[4] == undef)
assert(not coroutine.resume(c))
end
do
-- testing debug library on last function in a suspended coroutine
-- (bug in 5.2/5.3)
local c = coroutine.create(function () T.testC("yield 1", 10, 20) end)
local a, b = coroutine.resume(c)
assert(a and b == 20)
assert(debug.getinfo(c, 0).linedefined == -1)
a, b = debug.getlocal(c, 0, 2)
assert(b == 10)
end
print "testing coroutine API"
-- reusing a thread
assert(T.testC([[
newthread # create thread
pushvalue 2 # push body
pushstring 'a a a' # push argument
xmove 0 3 2 # move values to new thread
resume -1, 1 # call it first time
pushstatus
xmove 3 0 0 # move results back to stack
setglobal X # result
setglobal Y # status
pushvalue 2 # push body (to call it again)
pushstring 'b b b'
xmove 0 3 2
resume -1, 1 # call it again
pushstatus
xmove 3 0 0
return 1 # return result
]], function (...) return ... end) == 'b b b')
assert(X == 'a a a' and Y == 'OK')
X, Y = nil
-- resuming running coroutine
C = coroutine.create(function ()
return T.testC([[
pushnum 10;
pushnum 20;
resume -3 2;
pushstatus
gettop;
return 3]], C)
end)
local a, b, c, d = coroutine.resume(C)
assert(a == true and string.find(b, "non%-suspended") and
c == "ERRRUN" and d == 4)
a, b, c, d = T.testC([[
rawgeti R !M # get main thread
pushnum 10;
pushnum 20;
resume -3 2;
pushstatus
gettop;
return 4]])
assert(a == coroutine.running() and string.find(b, "non%-suspended") and
c == "ERRRUN" and d == 4)
-- using a main thread as a coroutine (dubious use!)
local state = T.newstate()
-- check that yielddable is working correctly
assert(T.testC(state, "newthread; isyieldable -1; remove 1; return 1"))
-- main thread is not yieldable
assert(not T.testC(state, "rawgeti R !M; isyieldable -1; remove 1; return 1"))
T.testC(state, "settop 0")
T.loadlib(state, 1 | 2, 4) -- load _G and 'package', preload 'coroutine'
assert(T.doremote(state, [[
coroutine = require'coroutine';
X = function (x) coroutine.yield(x, 'BB'); return 'CC' end;
return 'ok']]))
local t = table.pack(T.testC(state, [[
rawgeti R !M # get main thread
pushstring 'XX'
getglobal X # get function for body
pushstring AA # arg
resume 1 1 # 'resume' shadows previous stack!
gettop
setglobal T # top
setglobal B # second yielded value
setglobal A # fist yielded value
rawgeti R !M # get main thread
pushnum 5 # arg (noise)
resume 1 1 # after coroutine ends, previous stack is back
pushstatus
return *
]]))
assert(t.n == 4 and t[2] == 'XX' and t[3] == 'CC' and t[4] == 'OK')
assert(T.doremote(state, "return T") == '2')
assert(T.doremote(state, "return A") == 'AA')
assert(T.doremote(state, "return B") == 'BB')
T.closestate(state)
print'+'
end
-- leaving a pending coroutine open
_G.TO_SURVIVE = coroutine.wrap(function ()
local a = 10
local x = function () a = a+1 end
coroutine.yield()
end)
_G.TO_SURVIVE()
if not _soft then
-- bug (stack overflow)
local lim = 1000000 -- stack limit; assume 32-bit machine
local t = {lim - 10, lim - 5, lim - 1, lim, lim + 1, lim + 5}
for i = 1, #t do
local j = t[i]
local co = coroutine.create(function()
return table.unpack({}, 1, j)
end)
local r, msg = coroutine.resume(co)
-- must fail for unpacking larger than stack limit
assert(j < lim or not r)
end
end
assert(coroutine.running() == main)
print"+"
print"testing yields inside metamethods"
local function val(x)
if type(x) == "table" then return x.x else return x end
end
local mt = {
__eq = function(a,b) coroutine.yield(nil, "eq"); return val(a) == val(b) end,
__lt = function(a,b) coroutine.yield(nil, "lt"); return val(a) < val(b) end,
__le = function(a,b) coroutine.yield(nil, "le"); return a - b <= 0 end,
__add = function(a,b) coroutine.yield(nil, "add");
return val(a) + val(b) end,
__sub = function(a,b) coroutine.yield(nil, "sub"); return val(a) - val(b) end,
__mul = function(a,b) coroutine.yield(nil, "mul"); return val(a) * val(b) end,
__div = function(a,b) coroutine.yield(nil, "div"); return val(a) / val(b) end,
__idiv = function(a,b) coroutine.yield(nil, "idiv");
return val(a) // val(b) end,
__pow = function(a,b) coroutine.yield(nil, "pow"); return val(a) ^ val(b) end,
__mod = function(a,b) coroutine.yield(nil, "mod"); return val(a) % val(b) end,
__unm = function(a,b) coroutine.yield(nil, "unm"); return -val(a) end,
__bnot = function(a,b) coroutine.yield(nil, "bnot"); return ~val(a) end,
__shl = function(a,b) coroutine.yield(nil, "shl");
return val(a) << val(b) end,
__shr = function(a,b) coroutine.yield(nil, "shr");
return val(a) >> val(b) end,
__band = function(a,b)
coroutine.yield(nil, "band")
return val(a) & val(b)
end,
__bor = function(a,b) coroutine.yield(nil, "bor");
return val(a) | val(b) end,
__bxor = function(a,b) coroutine.yield(nil, "bxor");
return val(a) ~ val(b) end,
__concat = function(a,b)
coroutine.yield(nil, "concat");
return val(a) .. val(b)
end,
__index = function (t,k) coroutine.yield(nil, "idx"); return t.k[k] end,
__newindex = function (t,k,v) coroutine.yield(nil, "nidx"); t.k[k] = v end,
}
local function new (x)
return setmetatable({x = x, k = {}}, mt)
end
local a = new(10)
local b = new(12)
local c = new"hello"
local function run (f, t)
local i = 1
local c = coroutine.wrap(f)
while true do
local res, stat = c()
if res then assert(t[i] == undef); return res, t end
assert(stat == t[i])
i = i + 1
end
end
assert(run(function () if (a>=b) then return '>=' else return '<' end end,
{"le", "sub"}) == "<")
assert(run(function () if (a<=b) then return '<=' else return '>' end end,
{"le", "sub"}) == "<=")
assert(run(function () if (a==b) then return '==' else return '~=' end end,
{"eq"}) == "~=")
assert(run(function () return a & b + a end, {"add", "band"}) == 2)
assert(run(function () return 1 + a end, {"add"}) == 11)
assert(run(function () return a - 25 end, {"sub"}) == -15)
assert(run(function () return 2 * a end, {"mul"}) == 20)
assert(run(function () return a ^ 2 end, {"pow"}) == 100)
assert(run(function () return a / 2 end, {"div"}) == 5)
assert(run(function () return a % 6 end, {"mod"}) == 4)
assert(run(function () return a // 3 end, {"idiv"}) == 3)
assert(run(function () return a + b end, {"add"}) == 22)
assert(run(function () return a - b end, {"sub"}) == -2)
assert(run(function () return a * b end, {"mul"}) == 120)
assert(run(function () return a ^ b end, {"pow"}) == 10^12)
assert(run(function () return a / b end, {"div"}) == 10/12)
assert(run(function () return a % b end, {"mod"}) == 10)
assert(run(function () return a // b end, {"idiv"}) == 0)
-- repeat tests with larger constants (to use 'K' opcodes)
local a1000 = new(1000)
assert(run(function () return a1000 + 1000 end, {"add"}) == 2000)
assert(run(function () return a1000 - 25000 end, {"sub"}) == -24000)
assert(run(function () return 2000 * a end, {"mul"}) == 20000)
assert(run(function () return a1000 / 1000 end, {"div"}) == 1)
assert(run(function () return a1000 % 600 end, {"mod"}) == 400)
assert(run(function () return a1000 // 500 end, {"idiv"}) == 2)
assert(run(function () return a % b end, {"mod"}) == 10)
assert(run(function () return ~a & b end, {"bnot", "band"}) == ~10 & 12)
assert(run(function () return a | b end, {"bor"}) == 10 | 12)
assert(run(function () return a ~ b end, {"bxor"}) == 10 ~ 12)
assert(run(function () return a << b end, {"shl"}) == 10 << 12)
assert(run(function () return a >> b end, {"shr"}) == 10 >> 12)
assert(run(function () return 10 & b end, {"band"}) == 10 & 12)
assert(run(function () return a | 2 end, {"bor"}) == 10 | 2)
assert(run(function () return a ~ 2 end, {"bxor"}) == 10 ~ 2)
assert(run(function () return a >> 2 end, {"shr"}) == 10 >> 2)
assert(run(function () return 1 >> a end, {"shr"}) == 1 >> 10)
assert(run(function () return a << 2 end, {"shl"}) == 10 << 2)
assert(run(function () return 1 << a end, {"shl"}) == 1 << 10)
assert(run(function () return 2 ~ a end, {"bxor"}) == 2 ~ 10)
assert(run(function () return a..b end, {"concat"}) == "1012")
assert(run(function() return a .. b .. c .. a end,
{"concat", "concat", "concat"}) == "1012hello10")
assert(run(function() return "a" .. "b" .. a .. "c" .. c .. b .. "x" end,
{"concat", "concat", "concat"}) == "ab10chello12x")
do -- a few more tests for comparison operators
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