[all-commits] [llvm/llvm-project] 1e91f3: [CommandLine] Add subcommand groups (#75678)

[Igor Kudrin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1e91f32ef777eb2a868acac99d25cba6d54feb02
      https://github.com/llvm/llvm-project/commit/1e91f32ef777eb2a868acac99d25cba6d54feb02
  Author: Igor Kudrin <ikudrin at accesssoftek.com>
  Date:   2023-12-20 (Wed, 20 Dec 2023)

  Changed paths:
    M llvm/include/llvm/Support/CommandLine.h
    M llvm/unittests/Support/CommandLineTest.cpp

  Log Message:
  -----------
  [CommandLine] Add subcommand groups (#75678)

The patch introduces a `SubCommandGroup` class which represents a list
of subcommands. An option can be added to all these subcommands using
one `cl::sub(group)` command. This simplifies the declaration of options
that are shared across multiple subcommands of a tool.