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假设我有一个用户注册日期及其 22/7/2016 不，我只想启用 22/7/2016 和今天之间的日期。
以前的日期和未来的日期应该被禁用 我该怎么做？
完整的错误信息：
error: conversion from 'void' to non-scalar type 'std::vector<std::basic_string<char, std::char_traits<cha