Attribute Macro system_impl 

#[system_impl]

Mark a function as an Ecsact system implementation. A C function will be created for you that will call the marked function with safe context struct from the Ecsact code generator.

See: https://ecsact.dev/docs/system-impl

Example

Given the following Ecsact file contents:

package example;
component Position { f32 x; f32 y; }
system Gravity { readwrite Position; }

A system implementation may be created with the proc macro like so:

#[ecsact_macro::system_impl("example.Gravity")]
fn gravity(ctx: &mut example::Gravity::Context) {
    todo!()
}