diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index a029195e0..6610633ca 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -32,5 +32,8 @@ jobs:
           reporter: ${{ github.event_name == 'pull_request' && 'github-pr-review' || 'github-check' }}
           clippy_flags: --all-features
 
+      - name: format
+        run: cargo fmt --all -- --check
+
       - name: unit test
         run: cargo test
diff --git a/build.rs b/build.rs
index 6b26281e6..37aff7ecb 100644
--- a/build.rs
+++ b/build.rs
@@ -119,7 +119,11 @@ fn get_definitions(src_file: &str) -> HashMap<String, Option<String>> {
 
                 let first = token.first().unwrap();
                 let last = token.last().unwrap();
-                if first.get_kind() == Punctuation && last.get_kind() == Punctuation && first.get_spelling() == "(" && last.get_spelling() == ")" {
+                if first.get_kind() == Punctuation
+                    && last.get_kind() == Punctuation
+                    && first.get_spelling() == "("
+                    && last.get_spelling() == ")"
+                {
                     token.remove(0);
                     token.remove(token.len() - 1);
                 }