Update Attributes, Annotations & Decorators Topic

Author: LeonnardoVerol

docs/programming-languages/attributes-annotations-decorators/_c.mdx

@@ -1,5 +1,15 @@
 ```C
-// TODO
+// No Standard Attribute System before C23.
+// Compilers commonly provide extensions such as GCC attributes.
+
+__attribute__((deprecated))
+void old_function()
+{
+	// ...
+}
+
+__attribute__((unused))
+static int my_variable;
 ```
 > More Info:
 > - http://unixwiz.net/techtips/gnu-c-attributes.html

docs/programming-languages/attributes-annotations-decorators/_csharp.mdx

@@ -26,13 +26,50 @@ public class MyClass
 ```
 
 ```Cs
-// TODO: Examples
+// ------------------------------------
+// Other Standard Attributes
+// ------------------------------------
+
+[Serializable]
+public class User
+{
+	// ...
+}
+
+[Flags]
+public enum FileAccess
+{
+	Read = 1,
+	Write = 2,
+	Execute = 4
+}
+
+[Conditional("DEBUG")]
+public void LogDebug(string message)
+{
+	// ...
+}
 ```
 
 ```Cs
 // ------------------------------------
 // Custom Attributes
 // ------------------------------------
 
-// TODO: Examples
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
+public class DocumentationAttribute : Attribute
+{
+	public string Message { get; }
+
+	public DocumentationAttribute(string message)
+	{
+		Message = message;
+	}
+}
+
+[Documentation("Used by the syntax reference examples")]
+public class MyClass
+{
+	// ...
+}
 ```

docs/programming-languages/attributes-annotations-decorators/_go.mdx

@@ -1,3 +1,15 @@
 ```Go
-// TODO
+// Go has no general attribute/annotation syntax.
+// Struct tags are metadata strings used by packages such as encoding/json.
+
+type User struct {
+	Name string `json:"name"`
+	Age  int    `json:"age,omitempty"`
+}
+
+// Compiler directives exist as comments for specific toolchain behavior.
+//go:noinline
+func myFunction() {
+	// ...
+}
 ```

docs/programming-languages/attributes-annotations-decorators/_java.mdx

@@ -16,15 +16,46 @@ public void MyMethod()
 ```
 
 ```Java
-// TODO: Examples
+// ------------------------------------
+// Other Standard Annotations
+// ------------------------------------
+
+@Override
+public String toString()
+{
+	return "MyClass";
+}
+
+@SuppressWarnings("unchecked")
+public void myMethod()
+{
+	// ...
+}
+
+@FunctionalInterface
+public interface Operation
+{
+	int apply(int first, int second);
+}
 ```
 
 ```Java
 // ------------------------------------
 // Custom Annotation
 // ------------------------------------
 
-// TODO: Examples
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ ElementType.TYPE, ElementType.METHOD })
+public @interface Documentation
+{
+	String value();
+}
+
+@Documentation("Used by the syntax reference examples")
+public class MyClass
+{
+	// ...
+}
 ```
 
 > More Info:

docs/programming-languages/attributes-annotations-decorators/_python.mdx

@@ -23,5 +23,17 @@ class SomeClass(object):
 # Custom Decorator
 # ------------------------------------
 
-# TODO: Examples
+from functools import wraps
+
+def trace(function):
+	@wraps(function)
+	def wrapper(*args, **kwargs):
+		print(f"Calling {function.__name__}")
+		return function(*args, **kwargs)
+
+	return wrapper
+
+@trace
+def add(first, second):
+	return first + second
 ```

docs/programming-languages/attributes-annotations-decorators/_rust.mdx

@@ -1,3 +1,16 @@
 ```Rust
-// TODO
+#[derive(Debug, Clone)]
+struct User {
+	name: String,
+}
+
+#[deprecated(note = "Use new_function instead")]
+fn old_function() {
+	// ...
+}
+
+#[allow(dead_code)]
+fn helper() {
+	// ...
+}
 ```