isCopyConstructorEnabled

Template to determine if hook enables or disables copy constructor.

It is enabled by default.

See hasOnUnchecked handler, which can be used in combination with disabled copy constructor to enforce result check.

If copy constructor is disabled, it severely limits function chaining as Expected needs to be passed as rvalue in that case.

@safe

template isCopyConstructorEnabled (

Hook

) {

static if(__traits(hasMember, Hook, "enableCopyConstructor"))

static if(__traits(getMember, Hook, "enableCopyConstructor"))

enum isCopyConstructorEnabled;

static if(__traits(hasMember, Hook, "enableCopyConstructor"))

static if(!(__traits(getMember, Hook, "enableCopyConstructor")))

enum isCopyConstructorEnabled;

static if(!(__traits(hasMember, Hook, "enableCopyConstructor")))

enum isCopyConstructorEnabled;

}

Members

Manifest constants

isCopyConstructorEnabled enum isCopyConstructorEnabled;: Undocumented in source.
isCopyConstructorEnabled enum isCopyConstructorEnabled;: Undocumented in source.
isCopyConstructorEnabled enum isCopyConstructorEnabled;: Undocumented in source.

Examples

struct Foo {}
struct Bar { static immutable bool enableCopyConstructor = false; }
static assert(isCopyConstructorEnabled!Foo);
static assert(!isCopyConstructorEnabled!Bar);

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