Clean the implementation of Default for BindgenOptions (#2332)

* Clean the implementation of `Default` for `BindgenOptions`

Author: pvdrz

bindgen/lib.rs

@@ -2204,103 +2204,114 @@ impl BindgenOptions {
 
 impl Default for BindgenOptions {
     fn default() -> BindgenOptions {
+        macro_rules! options {
+            ($($field:ident $(: $value:expr)?,)* --default-fields-- $($default_field:ident,)*) => {
+                BindgenOptions {
+                    $($field $(: $value)*,)*
+                    $($default_field: Default::default(),)*
+                }
+            };
+        }
+
         let rust_target = RustTarget::default();
 
-        BindgenOptions {
+        options! {
             rust_target,
             rust_features: rust_target.into(),
-            blocklisted_types: Default::default(),
-            blocklisted_functions: Default::default(),
-            blocklisted_items: Default::default(),
-            blocklisted_files: Default::default(),
-            opaque_types: Default::default(),
-            rustfmt_path: Default::default(),
-            depfile: Default::default(),
-            allowlisted_types: Default::default(),
-            allowlisted_functions: Default::default(),
-            allowlisted_vars: Default::default(),
-            allowlisted_files: Default::default(),
-            default_enum_style: Default::default(),
-            bitfield_enums: Default::default(),
-            newtype_enums: Default::default(),
-            newtype_global_enums: Default::default(),
-            rustified_enums: Default::default(),
-            rustified_non_exhaustive_enums: Default::default(),
-            constified_enums: Default::default(),
-            constified_enum_modules: Default::default(),
-            default_macro_constant_type: Default::default(),
-            default_alias_style: Default::default(),
-            type_alias: Default::default(),
-            new_type_alias: Default::default(),
-            new_type_alias_deref: Default::default(),
-            default_non_copy_union_style: Default::default(),
-            bindgen_wrapper_union: Default::default(),
-            manually_drop_union: Default::default(),
-            builtins: false,
-            emit_ast: false,
-            emit_ir: false,
-            emit_ir_graphviz: None,
             layout_tests: true,
-            impl_debug: false,
-            impl_partialeq: false,
             derive_copy: true,
             derive_debug: true,
-            derive_default: false,
-            derive_hash: false,
-            derive_partialord: false,
-            derive_ord: false,
-            derive_partialeq: false,
-            derive_eq: false,
-            enable_cxx_namespaces: false,
-            enable_function_attribute_detection: false,
-            disable_name_namespacing: false,
-            disable_nested_struct_naming: false,
-            disable_header_comment: false,
-            use_core: false,
-            ctypes_prefix: None,
             anon_fields_prefix: DEFAULT_ANON_FIELDS_PREFIX.into(),
             convert_floats: true,
-            raw_lines: vec![],
-            module_lines: HashMap::default(),
-            clang_args: vec![],
-            input_headers: vec![],
-            input_header_contents: Default::default(),
-            parse_callbacks: Default::default(),
             codegen_config: CodegenConfig::all(),
-            conservative_inline_namespaces: false,
             generate_comments: true,
-            generate_inline_functions: false,
             allowlist_recursively: true,
-            generate_block: false,
-            objc_extern_crate: false,
-            block_extern_crate: false,
             enable_mangling: true,
             detect_include_paths: true,
-            fit_macro_constants: false,
             prepend_enum_name: true,
-            time_phases: false,
             record_matches: true,
             rustfmt_bindings: true,
             size_t_is_usize: true,
-            rustfmt_configuration_file: None,
-            no_partialeq_types: Default::default(),
-            no_copy_types: Default::default(),
-            no_debug_types: Default::default(),
-            no_default_types: Default::default(),
-            no_hash_types: Default::default(),
-            must_use_types: Default::default(),
-            array_pointers_in_arguments: false,
-            wasm_import_module_name: None,
-            dynamic_library_name: None,
-            dynamic_link_require_all: false,
-            respect_cxx_access_specs: false,
-            translate_enum_integer_types: false,
-            c_naming: false,
-            force_explicit_padding: false,
-            vtable_generation: false,
-            sort_semantically: false,
-            merge_extern_blocks: false,
-            abi_overrides: Default::default(),
+
+            --default-fields--
+            blocklisted_types,
+            blocklisted_functions,
+            blocklisted_items,
+            blocklisted_files,
+            opaque_types,
+            rustfmt_path,
+            depfile,
+            allowlisted_types,
+            allowlisted_functions,
+            allowlisted_vars,
+            allowlisted_files,
+            default_enum_style,
+            bitfield_enums,
+            newtype_enums,
+            newtype_global_enums,
+            rustified_enums,
+            rustified_non_exhaustive_enums,
+            constified_enums,
+            constified_enum_modules,
+            default_macro_constant_type,
+            default_alias_style,
+            type_alias,
+            new_type_alias,
+            new_type_alias_deref,
+            default_non_copy_union_style,
+            bindgen_wrapper_union,
+            manually_drop_union,
+            builtins,
+            emit_ast,
+            emit_ir,
+            emit_ir_graphviz,
+            impl_debug,
+            impl_partialeq,
+            derive_default,
+            derive_hash,
+            derive_partialord,
+            derive_ord,
+            derive_partialeq,
+            derive_eq,
+            enable_cxx_namespaces,
+            enable_function_attribute_detection,
+            disable_name_namespacing,
+            disable_nested_struct_naming,
+            disable_header_comment,
+            use_core,
+            ctypes_prefix,
+            raw_lines,
+            module_lines,
+            clang_args,
+            input_headers,
+            input_header_contents,
+            parse_callbacks,
+            conservative_inline_namespaces,
+            generate_inline_functions,
+            generate_block,
+            objc_extern_crate,
+            block_extern_crate,
+            fit_macro_constants,
+            time_phases,
+            rustfmt_configuration_file,
+            no_partialeq_types,
+            no_copy_types,
+            no_debug_types,
+            no_default_types,
+            no_hash_types,
+            must_use_types,
+            array_pointers_in_arguments,
+            wasm_import_module_name,
+            dynamic_library_name,
+            dynamic_link_require_all,
+            respect_cxx_access_specs,
+            translate_enum_integer_types,
+            c_naming,
+            force_explicit_padding,
+            vtable_generation,
+            sort_semantically,
+            merge_extern_blocks,
+            abi_overrides,
         }
     }
 }