Compile time string hashing
- by Caspin
I have read in few different places that using c++0x's new string literals it might be possible to compute a string's hash at compile time. However, no one seems to be ready to come out and say that it will be possible or how it would be done.
Is this possible?
What would the operator look like?
I'm particularly interested use cases like this.
void foo( const std::string& value )
{
switch( std::hash(value) )
{
case "one"_hash: one(); break;
case "two"_hash: two(); break;
/*many more cases*/
default: other(); break;
}
}
Note: the compile time hash function doesn't have to look exactly as I've written it. I did my best to guess what the final solution would look like, but meta_hash<"string"_meta>::value could also be a viable solution.
