Fix #57 - add extern crate proc_macro;

idanarye · Sep 3, 2021 · 1f33eb2 · 1f33eb2
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Fixed
+- Add `extern crate proc_macro;` to solve some weird problem (https://github.com/idanarye/rust-typed-builder/issues/57)
+
 ## 0.9.0 - 2021-01-31
 ### Added
 - Builder type implements `Clone` when all set fields support clone.

diff --git a/src/lib.rs b/src/lib.rs
@@ -1,3 +1,5 @@
+extern crate proc_macro; // Needed even though it's the 2018 edition. See https://github.com/idanarye/rust-typed-builder/issues/57.
+
 use proc_macro2::TokenStream;
 
 use syn::parse::Error;