Introduce a builder pattern for constructing a cache from flag
declarations and flag values. Teach the builder to sort the flags by
name as the last step. This will ensure consistent dump output
regardless of the order flags are specified in the input files.
Bug: 279485059
Test: atest aconfig.test
Change-Id: Icdd62f51fa3761a469663f17581a83d9909e9ffe
The general idea to reuse java codegen's very neat tiny template idea.
For generated cpp code, it is in the form of a collection of classes
inside a namespace. The reason we choose a collection of classes rather
than a collection of static functions is because gmock test technology
only supports mocking virtual method.
Bug: b/279483801
Test: atest aconfig.test
Change-Id: I9ba00667437ff7c3e147ff2828171fc95528bebf
