### Method

# GIRepository UnionInfo get_discriminator_offset

since: 2.80

#### Declaration

    gboolean
    gi_union_info_get_discriminator_offset (
      GIUnionInfo* info,
      size_t* out_offset
    )

#### Description

Obtain the offset of the discriminator field within the structure.

The union must be discriminated, or `FALSE` will be returned.

Available since: 2.80

#### Parameters

`out_offset`

  Type: `size_t*`

  Return location for the offset, in bytes, of the discriminator.

  The argument will be set by the function.
  The argument can be `NULL`.

#### Return value

Type: `gboolean`

`TRUE` if the union is discriminated.