derive_builder 0.20.2

Rust macro to automatically implement the builder pattern for arbitrary structs.
Documentation 
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#[macro_use]
extern crate derive_builder;

// This is a stand-in for any bad crate directive
mod empty {}

#[derive(Builder)]
// It would be nice if the "failed to resolve" errors would identify `"empty"` as the error span,
// but doing so would require rewriting a lot of the code generation to use the crate_root span
// for the full path of the thing being imported, and that doesn't seem worth the code churn.
#[builder(crate = "empty")]
struct BadCrate {
    lorem: String,
}

fn main() {}