[all-commits] [llvm/llvm-project] 408456: [llvm][utils] Support dereferencing llvm::Optional...

[Dave Lee via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 408456f53eccd9b2280840aff8fa99f865024544
      https://github.com/llvm/llvm-project/commit/408456f53eccd9b2280840aff8fa99f865024544
  Author: Dave Lee <davelee.com at gmail.com>
  Date:   2021-02-26 (Fri, 26 Feb 2021)

  Changed paths:
    M llvm/utils/lldbDataFormatters.py

  Log Message:
  -----------
  [llvm][utils] Support dereferencing llvm::Optional lldb formatter

Add deref support to `llvm::Optional` in `lldbDataFormatters.py`.

This creates a synthetic provider that adds dereference support, but otherwise proxies all access to the underlying value.

With this change, an optional value can be displayed by running `v *someOptional`, and its contents can be accessed with the arrow `operator->`, for example `v someOpt->HasThing`. This matches expressions usable from expression evaluation.

See also D97165 and D97524.

Differential Revision: https://reviews.llvm.org/D97525