[ CCode ( instance_pos = 2.9 ) ]
public delegate bool StructureMapFunc (Quark field_id, ref Value value)
A function that will be called in map_in_place.
The function may modify value.
| field_id |
the Quark of the field name |
| value |
the Value of the field |
| user_data |
user data |
|
true if the map operation should continue, false if the map operation should stop with false. |