Function callGFunction

_vm.go:105–131

(L *LState, tailcall bool)

}

func callGFunction(L *LState, tailcall bool) bool {
	frame := L.currentFrame
	gfnret := frame.Fn.GFunction(L)
	if tailcall {
		L.currentFrame = L.RemoveCallerFrame()
	}

	if gfnret < 0 {
		switchToParentThread(L, L.GetTop(), false, false)
		return true
	}

	wantret := frame.NRet
	if wantret == MultRet {
		wantret = gfnret
	}

	if tailcall && L.Parent != nil && L.stack.Sp() == 1 {
		switchToParentThread(L, wantret, false, true)
		return true
	}

	// +inline-call L.reg.CopyRange frame.ReturnBase L.reg.Top()-gfnret -1 wantret
	L.stack.Pop()
	L.currentFrame = L.stack.Last()
	return false
}

func threadRun(L *LState) {
	if L.stack.IsEmpty() {