08c2e86802
Summary: This replaces the format member search, which was quite complicated, with a more direct approach to detecting whether a class should be formatted using the format-member method. Instead we use a special type llvm::format_adapter, which every adapter must inherit from. Then the search can be simply implemented with the is_base_of type trait. Aside from the simplification, I like this way more because it makes it more explicit that you are supposed to use this type only for adapter-like formattings, and the other approach (format_provider overloads) should be used as a default (a mistake I made when first trying to use this library). The only slight change in behaviour here is that now choose the format-adapter branch even if the format member invocation will fail to compile (e.g. because it is a non-const member function and we are passing a const adapter), whereas previously we would have gone on to search for format_providers for the type. However, I think that is actually a good thing, as it probably means the programmer did something wrong. Reviewers: zturner, inglorion Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D27679 llvm-svn: 289795