How to pass a 'symbol_name' into an action?

Question

Does anyone know how to pass an assets symbol_name in as an argument to an action? I have been trying the following:

.abi

"types": [{
"new_type_name": "symbol_name",
"type": "uint64"
}]

and .cpp

void contract::getsymbol(symbol_name sym) {
    print("Symbol is ", name{sym});
}

However when I try to pass in a symbol like TEST a get the following error:

Couldn't parse uint64_t

Answer 1

void contract::getsymbol(string sym) { symbol_type symb = string_to_symbol(4,sym.c_str()); print("Symbol is ", sym); print(symb.name()); }