Difference between revisions of "Union"
From AtlasWiki
| Line 1: | Line 1: | ||
The semantics of Union are those common to C++ unions and Ada discriminated records. | The semantics of Union are those common to C++ unions and Ada discriminated records. | ||
| + | Typically the fields of a union are all physically allocated at the same address. As a result, the size of the union is the size of the largest of its fields. | ||
== Specification == | == Specification == | ||
Latest revision as of 15:01, 5 March 2014
The semantics of Union are those common to C++ unions and Ada discriminated records.
Typically the fields of a union are all physically allocated at the same address. As a result, the size of the union is the size of the largest of its fields.
Specification
| Metaclass | Union |
|---|---|
| Extends | Classfier, StructuredType |
| Description | A structure that stores the value of exactly one of a set of fields at any given time |
Language Mappings
Union maps to the C++ concept of union. A discriminated union corresponds to an Ada discriminated record.
