Declare minimum Rust version in Cargo metadata

dtolnay · Oct 2, 2021 · b8dbdbb · b8dbdbb
1 parent a5b48e6
commit b8dbdbb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/Cargo.toml b/Cargo.toml
@@ -9,6 +9,7 @@ repository = "https://github.com/alexcrichton/proc-macro2"
 documentation = "https://docs.rs/proc-macro2"
 categories = ["development-tools::procedural-macro-helpers"]
 edition = "2018"
+rust-version = "1.31"
 description = """
 A substitute implementation of the compiler's `proc_macro` API to decouple
 token-based libraries from the procedural macro use case.