Commits on Nov 21, 2024

1. Add fallback attribute to all strip_options. …

   Auto-derived `TypedBuilder` traits in combination with `strip_option`
   attributes are very hard to use in scenarios where options passed to the
   builder depend on user input. The problem is that this pattern doesn't
   work, since the two match branches return different types:
   
   ```rust
   let builder = match x {
       None => builder,
       Some(x) => builder.x(x),
   };
   ```
   
   Fortunately typed_builder 0.20 supports an additional attribute
   (`fallback`) that generates a builder method that takes `Option<T>` in
   addition to the method that takes naked `T`.
   
   With this attribute, we can write `let builder = builder.x_opt(x)`.
   
   This commit adds the `fallback` attribute to all fields that have the
   `strip_option` annotation.
   
   Signed-off-by: Leonid Ryzhyk <[email protected]>

   Leonid Ryzhyk committed Nov 21, 2024
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