Add Make factory function to Block.
Block::Make always makes a real Block object. This is important because
many callers rely on Blocks specifically; e.g. a function body must be a
scoped Block, nothing else will do.
However, unscoped Blocks are just a collection of Statements and usually
have more flexibility. So, Block::MakeUnscoped is a factory function
that will return the Statement as-is for a single-statement unscoped
Block. For an entirely empty Block, MakeUnscoped returns Nop.
Change-Id: Ied65d505bde4ea7f6157a039944018546e4b7333
Bug: skia:11342
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/384180
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
10 files changed