diff --git a/documentation/standard_library.md b/documentation/standard_library.md
index e45748e..2cdf206 100644
--- a/documentation/standard_library.md
+++ b/documentation/standard_library.md
@@ -10,30 +10,58 @@ Has the following binops defined:
 - `String` + `*char` = `String`
 - `String` + `u64` = `String`
 
-#### `pub fn print(message: String)`
+##### `String::new() -> String`
 
-Prints given `message` to the standard output
+Returns a new empty `String`-object, which must later be manually freed.
+
+##### `String::from(str: *char) -> String`
+
+Creates a new `String`-object containing initially data from the given string-literal which must be later freed.
+
+##### `String::set(&mut self, c: char, position: u64)`
+
+Edits given `string` by setting the character at index `position` to be `c`.
+
+##### `String::push_num(&mut self, num: u64)`
+
+Formats the given number into the end of the string.
+
+##### `String::concat(&mut self, source: String)`
+
+Concatenates `source` to the end of `destination`.
+
+### Deprecated functions
 
 #### `pub fn new_string() -> String`
 
 Returns a new empty `String`-object, which must later be manually freed.
 
+_deprecated: Use `String::new()`_
+
 #### `pub fn from_str(string: *char) -> String`
 
 Creates a new `String`-object containing initially data from the given string-literal which must be later freed.
 
+_deprecated: Use `String::from()`_
+
 #### `pub fn set_char(string: &mut String, c: char, position: u64)`
 
 Edits given `string` by setting the character at index `position` to be `c`.
 
+_deprecated: Use `String::set()`_
+
 #### `pub fn add_num_to_string(string: &mut String, num: u64)`
 
 Formats the given number into the end of the string.
 
+_deprecated: Use `String::push_num()`_
+
 #### `pub fn concat_strings(destination: &mut String, source: String)`
 
 Concatenates `source` to the end of `destination`.
 
+_deprecated: Use `String::concat()`_
+
 ## General
 
 #### `pub fn allocate(size: u64) -> *u8`
diff --git a/reid/lib/std.reid b/reid/lib/std.reid
index 269ce49..7b4b86f 100644
--- a/reid/lib/std.reid
+++ b/reid/lib/std.reid
@@ -76,6 +76,18 @@ impl String {
         else if rem == 9 { self.add_char('9'); }
     }
 
+    pub fn concat(&mut self, other: &String) {
+        for i in 0 .. *other.length {
+            self.add_char(*other.inner[i]);
+        }
+    }
+
+    pub fn set(&mut self, c: char, position: u64) {
+        if position <= (*self).length {
+            (*self).inner[position] = c;
+        }
+    }
+
     pub fn free(&self) {
         free((*self).inner as *u8);
     }