Namespaces
Variants
Views
Actions

C++ keywords: typename

From cppreference.com
< cpp‎ | keyword
 
 
C++ language
General topics
Flow control
Conditional execution statements
if
Iteration statements (loops)
for
range-for (C++11)
Jump statements
Functions
Function declaration
Lambda function declaration
inline specifier
Dynamic exception specifications (until C++20)
noexcept specifier (C++11)
Exceptions
Namespaces
Types
Specifiers
decltype (C++11)
auto (C++11)
alignas (C++11)
Storage duration specifiers
Initialization
Expressions
Alternative representations
Literals
Boolean - Integer - Floating-point
Character - String - nullptr (C++11)
User-defined (C++11)
Utilities
Attributes (C++11)
Types
typedef declaration
Type alias declaration (C++11)
Casts
Implicit conversions - Explicit conversions
static_cast - dynamic_cast
const_cast - reinterpret_cast
Memory allocation
Classes
Class-specific function properties
explicit (C++11)
static
Special member functions
Templates
Miscellaneous
 
 

[edit] Usage

  • In the template parameter list of a template declaration, typename can be used as an alternative to class to declare type template parameters and template template parameters (since C++17).
  • Inside a declaration or a definition of a template, typename can be used to declare that a dependent qualified name is a type.
  • Inside a declaration or a definition of a template, (until C++11) typename can be used before a non-dependent qualified type name. It has no effect in this case.
  • Inside a requirements for type requirements (since C++20)