type_info< T > Class Template Reference

#include <elm/type_info.h>

Inheritance diagram for type_info< T >:

Public Types
enum	{ is_class = 1 }
enum	{ is_deep = 1 }
enum	{ is_virtual = 1 }
enum	{ is_enum = intern::is_scalar<T>::_ }
enum	{ is_scalar = intern::is_scalar<T>::_ }
typedef T	var_t
typedef var_t	embed_t
typedef T &	out_t
typedef T &	mut_t
Public Types inherited from default_t
enum	{ is_type = 0 }
enum	{ is_scalar = 0 }
enum	{ is_enum = 0, is_defined_enum = 0 }
enum	{ is_class = 0 }
enum	{ is_ptr = 0 }
enum	{ is_ref = 0 }
enum	{ is_deep = 0 }
enum	{ is_virtual = 0 }
enum	{ is_void = 0 }

Static Public Member Functions
static cstring	name (void)
static T &	ref (T &v)
static const T &	get (const T &v)
static void	put (T &x, const T &v)

Public Attributes
const typedef T &	in_t
const typedef T &	ret_t

Detailed Description

template<class T>
class elm::type_info< T >

This class can not be instantiated. It provides only static information about the types used in a program. Although a partial type_info instantiation is provided for usual types of C++, the type_info may be specialized for user types in order to let ELM classes – like containers – to adapt to the custom types.

According the type T, one of the following information may also be available:

• const T null: null value for the types supporting one.
• const T min: minimum value for the types supporting a total order.
• const T max: maximum value for the types supporting a total order.

Parameters

T	Type to get information for.

Member Typedef Documentation

embed_t

typedef var_t embed_t

mut_t

mut_t

Type definition to return a mutable reference of type T. For most types, this is a reference to the type. For reference, a delegate class supporting conversion to T and assignment is returned.

out_t

out_t

Typed definition to pass an output parameter of type T: usually a mutable reference T. The use of this type is forbidden when T is a reference.

var_t

var_t

Type definition that must be used to used the type T in the declaration of a mutable member variable. For most types, var_t is T itself but it becomes a pointer when T is a reference: this allows to support reference in container classes.

Member Enumeration Documentation

anonymous enum

anonymous enum

Enumerator
is_class	True if T is a class type.

anonymous enum

anonymous enum

Enumerator
is_deep	Does not support byte-to-byte copy.

anonymous enum

anonymous enum

Enumerator
is_virtual	Contains virtual functions.

anonymous enum

anonymous enum

Enumerator
is_enum	True if T is an enumerated type.

anonymous enum

anonymous enum

Enumerator
is_scalar	True if T is a scalar type (integer, float, boolean, etc).

Member Function Documentation

get()

ret_t get ( const T &  v )

inlinestatic

Get the value from a member variable embedded with var_t.

Parameters

v	Member variable to ge value from.

Returns

Value of v.

Referenced by elm::t::get().

name()

cstring name ( void  )

inlinestatic

Get the name of the type.

Returns

Type name.

Referenced by type_info< const T * >::name(), type_info< T * >::name(), type_info< const T & >::name(), and type_info< T & >::name().

put()

void put ( T &  x, const T &  v  )

inlinestatic

Store the value v in a member variable declared with var_t.

Parameters

x	Member variable to set.
v	Value to set in the member variable.

Referenced by Option< T >::operator=(), and elm::t::put().

ref()

mut_t ref ( T &  v )

inlinestatic

Get a mutable reference from a member variable embedded with var_t.

Parameters

v	Member variable to get reference from.

Returns

Mutable reference to v.

Referenced by elm::t::ref().

Member Data Documentation

in_t

in_t

Type definition to pass an input parameter of type T. For scalar types, in_t is T itself. For more complex types, a constant reference is used.

ret_t

ret_t

Type definition to return a value of type T. For scalar types and references, out_t is T itself. For more complex types, a constant reference is used.

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The documentation for this class was generated from the following files:

• include/elm/type_info.h
• src/type_info.cpp