[cfe-dev] Can newFrontendActionFactory be allowed to take arbitrary arguments?

[Manasij Mukherjee]

Hi,
In a lot of the examples, a clang tool is invoked in the following way:

Tool.run(newFrontendActionFactory<ActionType>().get());

The problem is that this does not allow the user to construct their object
with arguments.
The solution is implementing a FrontendActionFactory and overriding create.

This is overkill in my opinion and can be easily integrated into the
SimpleFrontendActionFactory class defined in the library function as
follows.

template <typename T>
std::unique_ptr<FrontendActionFactory> newFrontendActionFactory() {
  class SimpleFrontendActionFactory : public FrontendActionFactory {
  public:
    clang::FrontendAction *create() override { return new T; }
  };

  return std::unique_ptr<FrontendActionFactory>(
      new SimpleFrontendActionFactory);
}

This can be adapted to to use variadic templates, store the arguments
somehow and use them when constructing the new T.

Is that a viable idea?
Manasij Mukherjee
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