Feature Gates

Diplomat supports selectively disabling bindings based on a list of features. These features are separate from Cargo features. Enabled features can be specified through config, and are NOT tied into Cargo.toml features in any way.

So:

#[diplomat::attr(not(feature=some_feature), disable)]
mod ffi {}

Will only appear for backends which have some_feature enabled. You can do this through the config features_enabled:

#[diplomat::config(features_enabled=["this_feature", "some_feature"])]
struct Config;

Which will cause anything tagged with some_feature to generate across all backends.

CLI

You can set a list of features that all backends can use (backend-specific configs can override this):

diplomat_tool cpp . --features-enabled=some,comma,separated,list