{
    "": "返回容器的键相等性函数。",
    ":83": "```cpp struct point { int x; int y; };",
    ":89": "bool operator==(point const& p1, point const& p2) { return p1.x == p2.x && p1.y == p2.y; }",
    ":111": "```cpp struct point { int x; int y; };",
    ":117": "bool operator==(point const& p1, point const& p2) { return p1.x == p2.x && p1.y == p2.y; }"
}