| ClassAttr ::= … |
|---|
| auto |
| explicit |
| sequential |
The type layout specifies how the fields of an instance of a type are arranged. A given type shall have only one layout attribute specified. By convention, ilasm supplies auto if no layout attribute is specified. The layout attributes are:
auto: The layout shall be done by the CLI, with no user-supplied constraints.
explicit: The layout of the fields is explicitly provided (§II.10.7). However, a generic type shall not have explicit layout.
sequential: The CLI shall lay out the fields in sequential order, based on the order of the fields in the logical metadata table (§II.22.15).
[Rationale: The default auto layout should provide the best layout for the platform on which the code is executing. sequential layout is intended to instruct the CLI to match layout rules commonly followed by languages like C and C++ on an individual platform, where this is possible while still guaranteeing verifiable layout. explicit layout allows the CIL generator to specify the precise layout semantics. end rationale]