TypeId Struct Reference

#include <evo/meta.h>

Detailed Description

Type ID info (POD, ByteCopy, Normal).

• This is used to find out whether a given type is a POD (Plain Old Data) type, a ByteCopy type, or a Normal type
• Usually used to specialize a class on each of these IDs
• Categories of type IDs:
  • TypeId::Get has normal types (Pod/ByteCopy/Normal)
  • TypeId::GetFill has array/buffer fill types (memset/memcpy/assign)

#include <evo/type.h>

Example

#include <evo/type.h>
#include <evo/io.h>
using namespace evo;

// Example item types, declare Foo as a ByteCopy type
struct Foo { };
struct Bar { };
EVO_BCTYPE(Foo);

// Create MyClass specializations -- U is inferred from T
template<class T, class U=typename TypeId::Get<T>::Id>
struct MyClass {
    static void print() {
        con().out << "MyClass with Normal type" << NL;
    }
};

template<class T>
struct MyClass<T, TypeId::Pod> {
    static void print() {
        con().out << "MyClass with POD type" << NL;
    }
};

template<class T>
struct MyClass<T, TypeId::ByteCopy> {
    static void print() {
        con().out << "MyClass with ByteCopy type" << NL;
    }
};

int main() {
    MyClass<int>::print();      // POD type
    MyClass<Foo>::print();      // ByteCopy type
    MyClass<Bar>::print();      // Normal type
    return 0;
};

Output:

MyClass with POD type
MyClass with ByteCopy type
MyClass with Normal type

Classes
struct	ByteCopy
	Used to identify ByteCopy types. More...
struct	Get
	Use to get type ID info for type T. More...
struct	GetFill
	Use to get type ID info for type T as for filling arrays/buffers. More...
struct	Normal
	Used to identify normal types (not POD, and not ByteCopy). More...
struct	Pod
	Used to identify POD (Plain Old Data) types. More...

Public Types
enum	Enum { POD = 0, BCOPY, NORMAL }
	Type ID enum values. More...

Member Enumeration Documentation

Enum

enum Enum

Type ID enum values.

Enumerator
POD	POD (Plain Old Data) type ID value.
BCOPY	Byte-copy type ID value.
NORMAL	Normal type ID value

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The documentation for this struct was generated from the following file:

• evo/meta.h