Argument-dependent lookup, also known as ADL, or Koenig lookup, is the set of rules for looking up the unqualified function names in

Queries information of a type. Used where the dynamic type of a polymorphic object must be known and for static type identification.

Introduces implementation-defined attributes for types, objects, code, etc. [[ attr]]

Inspects the declared type of an entity or queries the type and value category of an expression. Syntax

Allows a function to be called without providing one or more trailing arguments. Indicated by using the following syntax for a parameter in

Defines an expression that can be evaluated at compile

Declares a named variable as a reference, that is, an alias to an already-existing object or function. Syntax A

Declares a variable of a pointer or pointer-to-member type. Syntax A pointer declaration is any simple

Returns the result of a boolean operation. Operator name Syntax

Namespaces provide a method for preventing name conflicts in large projects. Symbols declared inside a namespace block are placed in a named