假设我有以下代码:
Using conn As New OracleConnection(connString)
conn.Open()
Using oCommand As New OracleCommand("MERGE INTO...")
oCommand.BindByName = True
oCommand.Parameters.Add("param1",OracleDbType.Raw,value,ParameterDirection.Input)
oCommand.Parameters.A
下面是来自的代码片段。
_FBKVOInfo *info;
{
// lookup context in registered infos, taking out a strong reference
// only if it exists
OSSpinLockLock(&_lock);
info = [_infos member:(__bridge id)context];
OSSpinLockUnlock(&_lock);
}
if (nil != info) {
这里的复合语句{...}是用来做什么的?