/** Provides the `Attribute` class. */

private import CIL
private import semmle.code.csharp.Location as CS

/** An attribute to a declaration, such as a method, field, type or parameter. */
class Attribute extends Element, @cil_attribute {
  /** Gets the declaration this attribute is attached to. */
  Declaration getDeclaration() { cil_attribute(this, result, _) }

  /** Gets the constructor used to construct this attribute. */
  Method getConstructor() { cil_attribute(this, _, result) }

  /** Gets the type of this attribute. */
  Type getType() { result = getConstructor().getDeclaringType() }

  override string toString() { result = "[" + getType().getName() + "(...)]" }

  /** Gets the value of the `i`th argument of this attribute. */
  string getArgument(int i) { cil_attribute_positional_argument(this, i, result) }

  /** Gets the value of the named argument `name`. */
  string getNamedArgument(string name) { cil_attribute_named_argument(this, name, result) }

  /** Gets an argument of this attribute, if any. */
  string getAnArgument() { result = getArgument(_) or result = getNamedArgument(_) }

  override CS::Location getLocation() { result = getDeclaration().getLocation() }
}