C++ C++；struct-作为此参数传递常量将丢弃限定符

因此，我试图创建一个结构

TileSet

并覆盖

您需要在
操作符的定义中添加一个
const
限定符尝试使操作符我想您可以在询问之前搜索google：
    struct TileSet
    {

        // ... other struct stuff, the only stuff that matters

        TileSet(const TileSet& copy)
        {
            this->gid = copy.gid;
            this->spacing = copy.spacing;
            this->width = copy.width;
            this->height = copy.height;
            this->texture = copy.texture;
        }

        bool operator<(const TileSet &b)
        {
            return this->gid < b.gid;
        }
    }; 

bool operator<(const TileSet &b) const
                               // ^^^ add me
{
    return this->gid < b.gid;
}