References to external schemas (or types) already include
the description in the external schema and therefore are
illegal.
The implementation consists of multiple parts:
* Introduce a `Maybe` type which can be `Explicit`,
`Derived` or `None`.
* Forbid `Explicit` descriptions on references.
* Instead of bailing out on such errors which causes all of
the generated code to vanish and create heaps of
additional nonsensical errors, add a way to *add* errors
without bailing out immediately via the `error!()` macro.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
API_RETURN_* and API_PARAMETER_* schemas are no references
anymore to allow using them as external schemas via the
`"schema"` key inside object schemas inside the `#[api]`
macro.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Initially it was a wrapper around Ident to avoid some
copies, but now it's what we use to allow hyphenated names
for fields in objects (as `syn::Ident` doesn't allow that at
all), so give it a more fitting name.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
