The ECMA 335 spec indicates that a few types, such as `System.Object`, or `System.Int16`, can be referenced in metadata as an integer value rather than a type ref token (built-in types). Additionally, the spec indicates that certain conversions are allowed between these types and a small set of token-referenced types – we shall refer to these as special types. Finally, a few types have special runtime treatment without being referenced like the other built-in types.
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@@ -19,19 +13,7 @@ Scenarios
3. A compiler is asked to type check two references to a built-in type, one of which is originating from a library compiled to an incompatible definition of core types
## 3. Customer Experience
Compilers may choose to identify the core library in any number of ways, e.g. heuristics or explicit user switch
## 4. Scope
This affects runtimes, API surface areas, and compilers targeting the new factored surface area.
## 5. Dependencies
None identified
## 6. Design
## Design
Compilers may assume that there is exactly one assembly representing the "core assembly". This core assembly is either referenced or is currently being compiled.
