add visitor for struct and check if in impl

libc-test/test/style/mod.rs

@@ -30,6 +30,7 @@ pub struct StyleChecker {
     errors: Vec<FileError>,
     /// Path of the currently active file
     path: PathBuf,
+    in_impl: bool,
 }
 
 #[derive(Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
@@ -121,7 +122,7 @@ impl StyleChecker {
     }
 
     fn set_state(&mut self, new_state: State, span: Span) {
-        if self.state > new_state {
+        if self.state > new_state && !self.in_impl {
             self.error_with_help(
                 "incorrect module layout".to_string(),
                 span,
@@ -160,8 +161,10 @@ impl StyleChecker {
         //     (self.on_err)(line, "multiple s! macros in one module");
         // }
 
-        self.state = new_state;
-        self.state_span = Some(span);
+        if self.state != new_state {
+            self.state = new_state;
+            self.state_span = Some(span);
+        }
     }
 
     /// Visit the items inside the [ExprCfgIf], restoring the state after
@@ -212,7 +215,6 @@ impl<'ast> Visit<'ast> for StyleChecker {
         let meta_str = meta_list.tokens.to_string();
         if meta_list.path.is_ident("cfg")
             && !(meta_str.contains("target_endian") || meta_str.contains("target_arch"))
-            && self.state != State::Structs
         {
             self.error_with_help(
                 "#[cfg] over cfg_if!".to_string(),
@@ -256,6 +258,19 @@ impl<'ast> Visit<'ast> for StyleChecker {
         visit::visit_item_const(self, item_const);
     }
 
+    fn visit_item_impl(&mut self, item_impl: &'ast syn::ItemImpl) {
+        self.in_impl = true;
+        visit::visit_item_impl(self, item_impl);
+        self.in_impl = false;
+    }
+
+    fn visit_item_struct(&mut self, item_struct: &'ast syn::ItemStruct) {
+        let span = item_struct.span();
+        self.set_state(State::Structs, span);
+
+        visit::visit_item_struct(self, item_struct);
+    }
+
     fn visit_item_type(&mut self, item_type: &'ast syn::ItemType) {
         let span = item_type.span();
         self.set_state(State::Typedefs, span);

src/teeos/mod.rs

@@ -51,9 +51,6 @@ pub type c_long = i64;
 
 pub type c_ulong = u64;
 
-#[repr(align(16))]
-pub struct _CLongDouble(pub u128);
-
 // long double in C means A float point value, which has 128bit length.
 // but some bit maybe not used, so the real length of long double could be 80(x86) or 128(power pc/IEEE)
 // this is different from f128(not stable and not included default) in Rust, so we use u128 for FFI(Rust to C).
@@ -88,6 +85,9 @@ pub type wctype_t = c_ulong;
 
 pub type cmpfunc = extern "C" fn(x: *const c_void, y: *const c_void) -> c_int;
 
+#[repr(align(16))]
+pub struct _CLongDouble(pub u128);
+
 #[repr(align(8))]
 #[repr(C)]
 pub struct pthread_cond_t {