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Diffstat (limited to 'crates/tt/src/lib.rs')
-rw-r--r--crates/tt/src/lib.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/crates/tt/src/lib.rs b/crates/tt/src/lib.rs
index 0316b15038..845ebfa4da 100644
--- a/crates/tt/src/lib.rs
+++ b/crates/tt/src/lib.rs
@@ -1,6 +1,9 @@
//! `tt` crate defines a `TokenTree` data structure: this is the interface (both
//! input and output) of macros. It closely mirrors `proc_macro` crate's
//! `TokenTree`.
+
+#![warn(rust_2018_idioms, unused_lifetimes, semicolon_in_expressions_from_macros)]
+
use std::fmt;
use stdx::impl_from;