+string
+to_string (string s)
+{
+ return s;
+}
+
+string
+to_string (char c, int n)
+{
+ return string (max (n, 0), c);
+}
+
+string
+to_string (double f, char const *format)
+{
+ return String_convert::double_string (f, format);
+}
+
+string
+to_string (int i, char const *format)
+{
+ return String_convert::int_string (i, format);
+}
+
+string
+to_string (bool b)
+{
+ return String_convert::bool_string (b);
+}
+
+string
+to_string (long b)
+{
+ return String_convert::long_string (b);
+}
+
+string
+to_string (long unsigned b)
+{
+ return String_convert::unsigned_string (b);
+}
+
+string
+to_string (unsigned u)
+{
+ return String_convert::unsigned_string (u);
+}
+
+string
+to_string (I64 b, char const *format)
+{
+ return String_convert::i64_string (b, format);
+}
+
+string
+to_string (char const *format, ...)
+{
+ va_list args;
+ va_start (args, format);
+ string str = String_convert::vform_string (format, args);
+ va_end (args);
+ return str;
+}
+
+/*
+ TODO: this O(n^2) in #occurences of find, due to repeated copying.
+ */
+string &
+replace_all (string *str, string const &find, string const &replace)
+{
+ ssize len = find.length ();
+ for (ssize i = str->find (find); i != NPOS; i = str->find (find, i + len))
+ *str = str->replace (i, len, replace);
+ return *str;
+}
+
+string &
+replace_all (string *str, char find, char replace)
+{
+ for (ssize i = str->find (find); i != NPOS; i = str->find (find, i + 1))
+ (*str)[i] = replace;
+ return *str;
+}
+
+char *
+string_copy (string s)
+{
+ ssize len = s.length ();
+ char *dest = new char[len + 1];
+ copy (s.begin (), s.end (), dest);
+ dest[len] = 0;