There is a range of different wordings used in the docs of constructor
type functions.
Change all to start with `Constructs a new` or `Constructs an empty`.
We have a couple of problems:
1. There are two macros currently for fmt stuff that do similar things,
`arr_newtype_fmt_impl` and `hex_fmt_impl` - the difference is not
immediately obvious, its the way that the byte array is iterated.
2. Our hash types are missing `AsRef<[u8; len]>` and `Borrow<[u8; len]>`.
Introduce a new macro and remove a bunch of other macros. Include
extensive docs but hide the macro from public docs because its not
really for consumers of the library.
The macro requires `$crate::hex` to point to `hex-conservative`.
Note the macro is pretty generic (as in general purpose), `hashes` might
not be the right home for it. Potentially a better place would be in
`hex` itself?
We are about to release `bitcoin_hashes 0.15.0`, replace the TBD string
with the version number.
Requires changing `allow(deprecated_in_future)` attribute to
`allow(deprecated)` (in functions that are them self deprecated).
We have two files one for public macros and one for private macros. Move
the `engine_input_impl` macro to the private macros file.
Requires change to call sites because we do not have `use_macros`
attribute on the `internal_macros` file.
These three macros are solely provided to reduce code duplication, they
are only part of the public API because they are used by the "real"
public macro `hash_newtype`.
Roll the `serde_macros` module into `macros`, requires making `macros`
public but since it explicitly holds public macros this is reasonable.
Keep the original module and deprecate it.