Huon Wilson 7753383223 [AST] Add @_hasInitialValue to var/lets that have initializers. ...

The information about whether a variable/property is initialized is lost in the
public interface, but is, unfortunately, required because it results in a symbol
for the initializer (if a class/struct `init` is inlined, it will call
initializers for properties that it doesn't initialize itself). This is
important to preserve for TBD file generation.

Using an attribute rather than just a bit on the VarDecl means this fits into
the scheme for module interfaces: textual/valid Swift.

2018-08-07 09:54:35 +10:00

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