How Can You Improve Scripting Engine Efficiency with STL Maps for Function Pointer Management?

Incorporating STL Map into a Scripting Engine for Function Pointer Storage

To enhance the efficiency of your scripting engine, consider leveraging an STL map for managing function pointers. This approach eliminates the need for lengthy conditional statements to invoke specific functions.

For this implementation, begin by declaring your function pointer type as a typedef for readability:

<code class="c++">typedef void (*ScriptFunction)(void); // function pointer type</code>

Next, define an unordered_map named script_map with string keys representing function names and ScriptFunction values for the corresponding pointer addresses:

<code class="c++">typedef std::unordered_map<std::string, ScriptFunction> script_map;</code>

Example function registration:

<code class="c++">void some_function() {}
script_map m;
m.emplace("blah", &some_function);</code>

To call a function, define a call_script function:

<code class="c++">void call_script(const std::string& pFunction) {
  auto iter = m.find(pFunction);
  if (iter == m.end()) {
    // function not found
  } else {
    (*iter->second)(); // invoke the function via the pointer
  }
}</code>

Emphasize that you can generalize the ScriptFunction type to std::function to cater to more than just bare function pointers.

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