John McCall a30d91e3cb Implement vararg expansion well enough to support argument forwarding. ...

I needed this for materializeForSet remission, but it makes inherited
variadic initializers work, too.

I tried to make this a reasonable starting point for a real language
feature.  Here's what's still missing:

- syntax
- semantic restrictions to ensure that the expression isn't written in
  invalid places or arbitrarily converted
- SILGen support for expansions that aren't the only variadic argument

rdar://16331406

2018-08-22 06:46:08 -04:00

3.8 KiB

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