gen: Unspecified type with 'format' leads to invalid Go code

[utherbit]

What version of ogen are you using?

$ go list -m github.com/ogen-go/ogen

github.com/ogen-go/ogen v1.14.0

Can this issue be reproduced with the latest version?

Yes

What did you do?

openapi: 3.0.3
info:
  title: API
  version: 0.1.0
paths:
  /timestamp:
    get:
      operationId: timestamp
      responses:
        '200':
          description: Test
          content:
            application/json:
              schema:
                type: object
                required:
                  - date
                  - time
                  - dateTime
                properties:
                  date:
                    format: date
                    x-ogen-time-format: 02/01/2006
                  time:
                    format: time
                    x-ogen-time-format: 3:04PM
                  dateTime:
                    format: date
                    x-ogen-time-format: 2006-01-02T15:04:05.999999999Z07:00

What did you expect to see?

Either inferred types based on format, use of jx.Raw without format assumptions, a generation warning, or a schema validation error.

What did you see instead?

Generated code is not compilable due to type mismatches caused by missing type with defined format.

[utherbit]

PS: I don’t see this as a critical issue, since it’s easy to work around by explicitly adding the missing type. Still, I’m a big fan of ogen — it's by far the most elegant and thoughtful code generator I’ve used. That’s exactly why I care: a tool this good deserves to never produce non-compilable code, even in edge cases like this.

[abemedia]

I think a good solution would be to ignore formats that aren't on a specified type, rather than implying the type.