# Gio::FileAttributeMatcher Class Reference

FileAttributeMatcher allows for searching through a FileInfo for attributes. More...

`#include <giomm/fileinfo.h>`

List of all members.

## Public Member Functions

void | reference () const
| Increment the reference count for this object.
void | unreference () const
| Decrement the reference count for this object.
GFileAttributeMatcher* | gobj ()
| Provides access to the underlying C instance.
const GFileAttributeMatcher* | gobj () const
| Provides access to the underlying C instance.
GFileAttributeMatcher* | gobj_copy () const
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
bool | matches (const std::string& full_name) const
| Checks if an attribute will be matched by an attribute matcher.
bool | matches_only (const std::string& full_name) const
| Checks if a attribute matcher only matches a given attribute.
bool | enumerate_namespace (const std::string& ns)
| Checks if the matcher will match all of the keys in a given namespace.
std::string | enumerate_next ()
| Gets the next matched attribute from a FileAttributeMatcher.

## Static Public Member Functions

static Glib::RefPtr < FileAttributeMatcher > | create (const std::string& attributes="*")
| Creates a new file attribute matcher, which matches attributes against a given string.

## Protected Member Functions

| FileAttributeMatcher ()
void | operator delete (void*, size_t)

## Related Functions

(Note that these are not member functions.)
Glib::RefPtr < Gio::FileAttributeMatcher > | wrap (GFileAttributeMatcher* object, bool take_copy=false)
| A Glib::wrap() method for this object.

## Detailed Description

FileAttributeMatcher allows for searching through a FileInfo for attributes.

Since glibmm 2.16:

## Constructor & Destructor Documentation

Gio::FileAttributeMatcher::FileAttributeMatcher | ( |  | ) | `[protected]`

## Member Function Documentation

static Glib::RefPtr<FileAttributeMatcher> Gio::FileAttributeMatcher::create | ( | const std::string & | attributes = `"*"` | ) | `[static]`

Creates a new file attribute matcher, which matches attributes against a given string.

The attribute string should be formatted with specific keys separated from namespaces with a double colon. Several "namespace::key" strings may be concatenated with a single comma (e.g. "standard::type,standard::is-hidden"). The wildcard "*" may be used to match all keys and namespaces, or "namespace::*" will match all keys in a given namespace.

Parameters:

  attributes | The attributes string.

Returns:
  a new FileAttributeMatcher.

bool Gio::FileAttributeMatcher::enumerate_namespace | ( | const std::string & | ns | ) |

Checks if the matcher will match all of the keys in a given namespace.

This will always return `true` if a wildcard character is in use (e.g. if matcher was created with "standard::*" and ns is "standard", or if matcher was created using "*" and namespace is anything.)

TODO: this is awkwardly worded.

Parameters:

  ns | A string containing a file attribute namespace.

Returns:
  `true` if the matcher matches all of the entries in the given ns, `false` otherwise.

std::string Gio::FileAttributeMatcher::enumerate_next | ( |  | ) |

Gets the next matched attribute from a FileAttributeMatcher.

Returns:
  A string containing the next attribute or `0` if no more attribute exist.

const GFileAttributeMatcher* Gio::FileAttributeMatcher::gobj | ( |  | ) | const

Provides access to the underlying C instance.

GFileAttributeMatcher* Gio::FileAttributeMatcher::gobj | ( |  | ) |

Provides access to the underlying C instance.

GFileAttributeMatcher* Gio::FileAttributeMatcher::gobj_copy | ( |  | ) | const

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

bool Gio::FileAttributeMatcher::matches | ( | const std::string & | full_name | ) | const

Checks if an attribute will be matched by an attribute matcher.

If the matcher was created with the "*" matching string, this function will always return `true`.

Parameters:

  attribute | A file attribute key.

Returns:
  `true` if attribute matches matcher. `false` otherwise.

bool Gio::FileAttributeMatcher::matches_only | ( | const std::string & | full_name | ) | const

Checks if a attribute matcher only matches a given attribute.

Always returns `false` if "*" was used when creating the matcher.

Parameters:

  attribute | A file attribute key.

Returns:
  `true` if the matcher only matches attribute. `false` otherwise.

void Gio::FileAttributeMatcher::operator delete | ( | void * | ,
|  | size_t |
| ) |  | `[protected]`

void Gio::FileAttributeMatcher::reference | ( |  | ) | const

Increment the reference count for this object.

You should never need to do this manually - use the object via a RefPtr instead.

void Gio::FileAttributeMatcher::unreference | ( |  | ) | const

Decrement the reference count for this object.

You should never need to do this manually - use the object via a RefPtr instead.

## Friends And Related Function Documentation

Glib::RefPtr< Gio::FileAttributeMatcher > wrap | ( | GFileAttributeMatcher * | object,
|  | bool | take_copy = `false`
| ) |  | `[related]`

A Glib::wrap() method for this object.

Parameters:

  object | The C instance.
  take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns:
  A C++ instance that wraps this C instance.