C ++关联数组任意类型的值 [英] C++ associative array with arbitrary types for values

问题描述

什么是有任意值类型的关联数组在C每个键+？

What is the best way to have an associative array with arbitrary value types for each key in C++?

目前我的计划是创建我会期待类型的成员变量价值类。例如：

Currently my plan is to create a "value" class with member variables of the types I will be expecting. For example:

class Value {

    int iValue;
    Value(int v) { iValue = v; }

    std::string sValue;
    Value(std::string v) { sValue = v; }

    SomeClass *cValue;
    Value(SomeClass *v) { cValue = c; }

};

std::map<std::string, Value> table;

这个一个缺点是你必须访问值时，知道类型。即：

A downside with this is you have to know the type when accessing the "Value". i.e.:

table["something"] = Value(5);
SomeClass *s = table["something"].cValue;  // broken pointer

还有更多的类型被放在值越臃肿的阵列会。

Also the more types that are put in Value, the more bloated the array will be.

什么更好的建议？

推荐答案

提振::变种看来你是寻找什么。

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