dcord.util.string source code

1 module dcord.util..string;
2 
3 import std..string;
4 import std.array;
5 import std.ascii : isLower, isUpper;
6 
7 /// Convert a camelCase string to a snake_case one. This is a pure function
8 pure string camelCaseToUnderscores(string input) {
9   auto stringBuilder = appender!string;
10   stringBuilder.reserve(input.length * 2);
11   bool previousWasLower = false;
12 
13   foreach (c; input) {
14     if(previousWasLower && c.isUpper()) stringBuilder.put('_');
15 
16     if(c.isLower()) previousWasLower = true;
17     else previousWasLower = false;
18     
19     stringBuilder.put(c);
20   }
21 
22   return stringBuilder.data.toLower();
23 }