Crate optionable_codegen 

The relevant main crate is optionable. The docs can be found there.

Purpose

This code generation proc_macro2 library serves two purposes:

• Used by optionable_derive to implement the #[derive(Optionable)]-macro re-exported by optionable.
• Used by the bin/codegen.rs crate to support generating Optionable-implementations for external packages. Due to the orphan rule the generated code has to be added to the Optionable-package (PRs welcome).

It has to be a separate crate from optionable_derive as the proc-macro crates can’t export its non-macro functions (even the proc_macro2 ones) for the usage by the codegen part.

Functions

attribute_derives

Returns the attribute for setting that the given identifiers should be added as derive macro to the optioned struct/enum.

attribute_no_convert

Returns the attribute for opting-out of OptionableConvert-impl generation.

attribute_suffix

Returns the attribute for setting a custom struct/enum name suffix instead of Opt.

derive_optionable

Derives the Optionable-trait from the main optionable-library.