Multiple minor lint fixes

Added all detected pedantic lints, and allowed them all to keep track of them because some should be fixed.  Also fixed a few minor simple ones.

Author: nyurik

.github/workflows/bindgen.yml

@@ -30,7 +30,7 @@ jobs:
         run: cargo fmt -- --check
 
       - name: Run clippy
-        run: cargo clippy --tests
+        run: cargo clippy --all-targets --workspace --exclude bindgen-integration --exclude tests_expectations
 
   msrv:
     runs-on: ubuntu-latest

Cargo.toml

@@ -48,18 +48,51 @@ syn = "2.0"
 tempfile = "3"
 
 [workspace.lints.rust]
-# unused_qualifications = "warn"
+unused_qualifications = "warn"
 
 [workspace.lints.clippy]
-# disallowed-names = "allow"
-# manual-c-str-literals = "allow"
-# missing-safety-doc = "allow"
-# op-ref = "allow"
-# ptr-offset-with-cast = "allow"
-# too-many-arguments = "allow"
-# transmute-int-to-bool = "allow"
-# unnecessary-cast = "allow"
-# useless-transmute  = "allow"
+pedantic = { level = "warn", priority = -1 }
+
+cast_possible_truncation = "allow"
+cast_possible_wrap = "allow"
+cast_precision_loss = "allow"
+cast_sign_loss = "allow"
+checked_conversions = "allow"
+default_trait_access = "allow"
+explicit_into_iter_loop = "allow"
+flat_map_option = "allow"
+ignored_unit_patterns = "allow"
+implicit_hasher = "allow"
+inconsistent_struct_constructor = "allow"
+items_after_statements = "allow"
+maybe_infinite_iter = "allow"
+missing_errors_doc = "allow"
+missing_panics_doc = "allow"
+module_name_repetitions = "allow"
+must_use_candidate = "allow"
+ptr_as_ptr = "allow"
+redundant_closure_for_method_calls = "allow"
+return_self_not_must_use = "allow"
+#should_panic_without_expect = "allow"
+similar_names = "allow"
+struct_excessive_bools = "allow"
+struct_field_names = "allow"
+unnecessary_wraps = "allow"
+unnested_or_patterns = "allow"
+unreadable_literal = "allow"
+used_underscore_binding = "allow"
+wildcard_imports = "allow"
+
+# TODO
+borrow_as_ptr = "allow"
+match_same_arms = "allow"
+trivially_copy_pass_by_ref = "allow"
+needless_pass_by_value = "allow"
+unused_self = "allow"
+
+# Theese seem to be ok to ignore for now
+enum_glob_use = "allow"
+too_many_lines = "allow"
 
 # Config for 'cargo release'
 [workspace.metadata.release]

bindgen-tests/tests/parse_callbacks/item_discovery_callback/mod.rs

@@ -94,12 +94,10 @@ pub fn compare_item_caches(generated: ItemCache, expected: ItemCache) {
             )
         });
 
-        if found.is_none() {
-            panic!(
-                "Missing Expected Item: {:#?}\n in {:#?}",
-                expected_item, generated
-            );
-        }
+        assert!(
+            found.is_some(),
+            "Missing Expected Item: {expected_item:#?}\n in {generated:#?}"
+        );
     }
 }
 
@@ -235,12 +233,9 @@ pub fn compare_alias_info(
     let expected_aliased = expected.get(expected_alias_for).unwrap();
 
     // We must have the aliased type in the cache
-    let generated_aliased =
-        if let Some(generated_aliased) = generated.get(generated_alias_for) {
-            generated_aliased
-        } else {
-            return false;
-        };
+    let Some(generated_aliased) = generated.get(generated_alias_for) else {
+        return false;
+    };
 
     compare_item_info(expected_aliased, generated_aliased, expected, generated)
 }

bindgen-tests/tests/quickchecking/src/bin.rs

@@ -41,9 +41,10 @@ fn parse_tests_count(v: &str) -> Result<u64, String> {
 // Parse CLI argument input for fuzzed headers output path.
 fn parse_path(v: &str) -> Result<PathBuf, String> {
     let path = PathBuf::from(v);
-    match path.is_dir() {
-        true => Ok(path),
-        false => Err(String::from("Provided directory path does not exist.")),
+    if path.is_dir() {
+        Ok(path)
+    } else {
+        Err(String::from("Provided directory path does not exist."))
     }
 }
 

bindgen-tests/tests/tests.rs

@@ -26,9 +26,10 @@ fn should_overwrite_expected() -> bool {
         if var == "1" {
             return true;
         }
-        if var != "0" && var != "" {
-            panic!("Invalid value of BINDGEN_OVERWRITE_EXPECTED");
-        }
+        assert!(
+            var == "0" || var == "",
+            "Invalid value of BINDGEN_OVERWRITE_EXPECTED"
+        );
     }
     false
 }

bindgen/clang.rs

@@ -1761,7 +1761,7 @@ impl File {
 
 fn cxstring_to_string_leaky(s: CXString) -> String {
     if s.data.is_null() {
-        return "".to_owned();
+        return String::new();
     }
     let c_str = unsafe { CStr::from_ptr(clang_getCString(s) as *const _) };
     c_str.to_string_lossy().into_owned()

bindgen/codegen/mod.rs

@@ -4565,7 +4565,7 @@ impl CodeGenerator for Function {
             FunctionKind::Function => {
                 ctx.options().dynamic_library_name.is_some()
             }
-            _ => false,
+            FunctionKind::Method(_) => false,
         };
 
         // Similar to static member variables in a class template, we can't
@@ -5878,7 +5878,7 @@ pub(crate) mod utils {
 
         // Check that the mangled name contains the canonical name after the
         // prefix
-        if &mangled_name[1..canonical_name.len() + 1] != canonical_name {
+        if &mangled_name[1..=canonical_name.len()] != canonical_name {
             return false;
         }
 

bindgen/ir/context.rs

@@ -2271,21 +2271,17 @@ If you encounter an error missing from this list, please file an issue or a PR!"
                             );
                         }
                         break;
-                    } else {
-                        // This is _likely_, but not certainly, a macro that's
-                        // been placed just before the namespace keyword.
-                        // Unfortunately, clang tokens don't let us easily see
-                        // through the ifdef tokens, so we don't know what this
-                        // token should really be. Instead of panicking though,
-                        // we warn the user that we assumed the token was blank,
-                        // and then move on.
-                        //
-                        // See also https://github.com/rust-lang/rust-bindgen/issues/1676.
-                        warn!(
-                            "Ignored unknown namespace prefix '{}' at {token:?} in {cursor:?}",
-                            String::from_utf8_lossy(name),
-                        );
                     }
+                    // This is _likely_, but not certainly, a macro that's
+                    // been placed just before the namespace keyword.
+                    // Unfortunately, clang tokens don't let us easily see
+                    // through the ifdef tokens, so we don't know what this
+                    // token should really be. Instead of panicking though,
+                    // we warn the user that we assumed the token was blank,
+                    // and then move on.
+                    //
+                    // See also https://github.com/rust-lang/rust-bindgen/issues/1676.
+                    warn!("Ignored unknown namespace prefix '{}' at {token:?} in {cursor:?}", String::from_utf8_lossy(name));
                 }
             }
         }
@@ -2613,7 +2609,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
 
     /// Call if an opaque array is generated
     pub(crate) fn generated_opaque_array(&self) {
-        self.generated_opaque_array.set(true)
+        self.generated_opaque_array.set(true);
     }
 
     /// Whether we need to generate the opaque array type

bindgen/ir/function.rs

@@ -17,7 +17,7 @@ use std::str::FromStr;
 
 const RUST_DERIVE_FUNPTR_LIMIT: usize = 12;
 
-/// What kind of a function are we looking at?
+/// What kind of function are we looking at?
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub(crate) enum FunctionKind {
     /// A plain, free function.

bindgen/ir/item.rs

@@ -1856,16 +1856,11 @@ impl Item {
         let parent = ctx.root_module().into();
 
         if let Some(id) = ctx.get_type_param(&definition) {
-            if let Some(with_id) = with_id {
-                return Some(ctx.build_ty_wrapper(
-                    with_id,
-                    id,
-                    Some(parent),
-                    &ty,
-                ));
+            return Some(if let Some(with_id) = with_id {
+                ctx.build_ty_wrapper(with_id, id, Some(parent), &ty)
             } else {
-                return Some(id);
-            }
+                id
+            });
         }
 
         // See tests/headers/const_tparam.hpp and