C++ string to enum

Question

Is there a simple way in C++ to convert a string to an enum (similar to Enum.Parse in C#)? A switch statement would be very long, so I was wondering i

Answer 1

"Additional question: Is it possibile to handle undefined strings ? I mean if I try to get the value for responseHeaderMap["cookie"], what will be the value? (provided that "cookie" is not defined in the responseHeaderMap – bart s Nov 22 '16 at 12:04"

well, you can just make check before:

auto it = responseHeaderMap.find("cookie");
if (it != responseHeaderMap.end())
{
     // "cookie" exist, can take value 
}

After "cookie" exist check, you can get it value with use:

responseHeaderMap["cookie"]

hope this help

Answer 2

You can use macro to minimize repeating yourself. Here is the trick: Enums, Macros, Unicode and Token-Pasting

Answer 3

While there is no direct solution, there are a few possible workarounds.

Take a look at this question: Easy way to use variables of enum types as string in C?

Answer 4

this worked for me:

enum NODES { Cone = 1, BaseColor = 2, NONE = 0 };

std::map<std::string, NODES> nodeMap;
nodeMap["Cone"] = NODES::Cone;
nodeMap["BaseColor"] = NODES::BaseColor;

Answer 5

It is not possible because the names are not available at runtime. During compilation each enum is replaced with the corresponding integer value.

Answer 6

No, you'll have to use an if/then construction, or use a map or hash table or some other type of associative data structure to facilitate this.