pub_source - Make Everything Public

pub_source provides the [make_public!] procedural macro, which rewrites a block of Rust source code so that all top level items become public.

This macro parses the input as a full [syn::File] and rewrites the following kinds of items to pub:

• functions
• structs and all of their fields
• enums
• type aliases
• constants and statics
• traits
• modules (recursively)
• impl blocks (functions, consts, type items inside them)
• unions

Non-items such as use, macros, or foreign modules are left unchanged.

This crate is also, unwrap, expect, and panic!() deny use.

Use case

This was originally written to be injected around user-submitted code in a code runner so that unit tests could access everything the user wrote. There may be other uses but I'm not quite sure what they might be yet.

Feature Flags

This crate provides two feature flags:

• std - used for enabling stdlib support, enabled by default
• unstable - used for enabling unstable features (trait aliases, impl-associated types) on nightly compilers that are using these features

Example

Input:

pub_source::make_public! {
    fn hidden() {}

    struct Thing {
        a: u32,
        b: String,
    }

    impl Thing {
        fn show(&self) {
            println!("{}", self.b);
        }
    }
}

Expands to code equivalent to:

pub fn hidden() {}

pub struct Thing {
    pub a: u32,
    pub b: String,
}

impl Thing {
    pub fn show(&self) {
        println!("{}", self.b);
    }
}