Code optimizations

- make variables const where possible
- use `std::ranges::transform`
- variable initialization optimized
- removed redundant namespace usage

src/include/string/string.h

@@ -1,11 +1,10 @@
 #ifndef C0DING_STRING_H
 #define C0DING_STRING_H
 
-#include <string>
-#include <ostream>
-#include <vector>
 #include <algorithm>
-#include <streambuf>
+#include <ostream>
+#include <string>
+#include <vector>
 
 namespace c0ding {
   class string {
@@ -41,7 +40,7 @@ namespace c0ding {
      * @param len The length of the substring, if not given, takes the string until the end.
      * @return The string object.
      */
-    string(const c0ding::string& str, std::size_t pos, std::size_t len = std::string::npos);
+    string(const string& str, std::size_t pos, std::size_t len = std::string::npos);
 
     /**
      * Substring constructor for std::string.
@@ -240,7 +239,7 @@ namespace c0ding {
     /**
      * Shift operator overloading for ostreams.
      *
-     * @param ostream The ostream to put the string into.
+     * @param os The ostream to put the string into.
      * @param str The string to put into the ostream.
      * @return The ostream.
      */
@@ -254,14 +253,14 @@ namespace c0ding {
     void erase_line(const std::string& sequence);
 
     /**
-     * The the std::string value of the string.
+     * The std::string value of the string.
      *
      * @return The std::string value.
      */
     std::string get();
 
     /**
-     * The the const std::string value of the string.
+     * The const std::string value of the string.
      *
      * @return The const std::string value.
      */

src/lib/string/string.cpp

@@ -135,12 +135,10 @@ namespace c0ding {
   }
 
   void string::erase_line(const std::string& sequence) {
-    std::size_t pos;
-
-    if ((pos = _data.find(sequence)) != std::string::npos) {
-      std::size_t start = _data.rfind('\n', pos);
-      std::size_t end = _data.find('\n', pos);
-      std::size_t size = (end != std::string::npos) ? end - start : _data.length() - start;
+    if (std::size_t pos; (pos = _data.find(sequence)) != std::string::npos) {
+      const std::size_t start = _data.rfind('\n', pos);
+      const std::size_t end = _data.find('\n', pos);
+      const std::size_t size = (end != std::string::npos) ? end - start : _data.length() - start;
       _data.erase(start, size);
     }
   }
@@ -154,10 +152,7 @@ namespace c0ding {
   }
 
   std::string string::get_from(std::string delim) {
-    std::string::size_type found;
-    found = _data.find(delim);
-
-    if (found != std::string::npos) {
+    if (const std::string::size_type found = _data.find(delim); found != std::string::npos) {
       _data.replace(0, (found + delim.length()), "");
       return _data;
     }
@@ -166,10 +161,7 @@ namespace c0ding {
   }
 
   std::string string::get_until(std::string delim) {
-    std::string::size_type found;
-    found = _data.find(delim);
-
-    if (found != std::string::npos) {
+    if (const std::string::size_type found = _data.find(delim); found != std::string::npos) {
       _data.replace(found, _data.length(), "");
       return _data;
     }
@@ -187,7 +179,7 @@ namespace c0ding {
   std::vector<std::string> string::split(const std::string& delim) {
     std::vector<std::string> parts;
 
-    if (!_data.length() || _data.length() <= 0) // string is not valid
+    if (_data.empty()) // string is not valid
       return parts;
 
     std::string::size_type start = _data.find_first_not_of(delim), end;
@@ -198,27 +190,23 @@ namespace c0ding {
     }
 
     while ((end = _data.find(delim, start)) != std::string::npos) {
-      std::string part = _data.substr(start, end - start);
-
-      if (part.length() > 0)
+      if (std::string part = _data.substr(start, end - start); !part.empty())
         parts.push_back(part);
 
       start = end + delim.length();
     }
 
-    std::string last = _data.substr(start, end - start);
-
-    if (last.length() > 0)
+    if (const std::string last = _data.substr(start, end - start); !last.empty())
       parts.push_back(last);
 
     return parts;
   }
 
   void string::to_lower() {
-    std::transform(_data.begin(), _data.end(), _data.begin(), ::tolower);
+    std::ranges::transform(_data, _data.begin(), ::tolower);
   }
 
   void string::to_upper() {
-    std::transform(_data.begin(), _data.end(), _data.begin(), ::toupper);
+    std::ranges::transform(_data, _data.begin(), ::toupper);
   }
 }