import std.stdio: writeln;

import std.exception: enforce;

import std.range: empty;

import std.format: format;

​

auto ref testNames(in string[] names) {

    enforce(!empty(names), "Names cannot be Empty or Null");

    import core.stdc.stdlib;

    import std.algorithm: any, canFind;

    string[] _names;

    size_t length = 20;

    char[] invalid = (cast(char*)malloc(char.sizeof * length))[0..length];

    invalid[0 ..length] = 0;

    try

        {

            invalid = ['\'','\"',':',';','*','&','[',']','-','+','$','#','<','>','{','}','(',')'];

            foreach(i; names.dup) {

                auto result = i.any!(a => invalid.canFind(a));

                if(result) { throw new Exception("Invalid Name passed: %s".format(i)); }

             }

        } catch(Exception e) { writeln(e.msg);  } finally { free(invalid.ptr);  }   

        _names = names.dup;

        return _names;

}

void main () {

writeln(testNames(["/T&name"]));

}