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//! Declarations and setter methods for `bindgen` options.
//!
//! The main entry point of this module is the `options` macro.
#[macro_use]
mod helpers;
mod as_args;
use crate::callbacks::ParseCallbacks;
use crate::codegen::{
AliasVariation, EnumVariation, MacroTypeVariation, NonCopyUnionStyle,
};
use crate::deps::DepfileSpec;
use crate::features::{RustFeatures, RustTarget};
use crate::regex_set::RegexSet;
use crate::Abi;
use crate::Builder;
use crate::CodegenConfig;
use crate::FieldVisibilityKind;
use crate::Formatter;
use crate::HashMap;
use crate::DEFAULT_ANON_FIELDS_PREFIX;
use std::env;
#[cfg(feature = "experimental")]
use std::path::Path;
use std::path::PathBuf;
use std::rc::Rc;
use as_args::AsArgs;
use helpers::ignore;
/// Macro used to generate the [`BindgenOptions`] type and the [`Builder`] setter methods for each
/// one of the fields of `BindgenOptions`.
///
/// The input format of this macro resembles a `struct` pattern. Each field of the `BindgenOptions`
/// type is declared by adding the name of the field and its type using the `name: type` syntax and
/// a block of code with the following items:
///
/// - `default`: The default value for the field. If this item is omitted, `Default::default()` is
/// used instead, meaning that the type of the field must implement `Default`.
/// - `methods`: A block of code containing methods for the `Builder` type. These methods should be
/// related to the field being declared.
/// - `as_args`: This item declares how the field should be converted into a valid CLI argument for
/// `bindgen` and is used in the [`Builder::command_line_flags`] method which is used to do a
/// roundtrip test of the CLI args in the `bindgen-test` crate. This item can take one of the
/// following:
/// - A string literal with the flag if the type of the field implements the [`AsArgs`] trait.
/// - A closure with the signature `|field, args: &mut Vec<String>| -> ()` that pushes arguments
/// into the `args` buffer based on the value of the field. This is used if the field does not
/// implement `AsArgs` or if the implementation of the trait is not logically correct for the
/// option and a custom behavior must be taken into account.
/// - The `ignore` literal, which does not emit any CLI arguments for this field. This is useful
/// if the field cannot be used from the `bindgen` CLI.
///
/// As an example, this would be the declaration of a `bool` field called `be_fun` whose default
/// value is `false` (the `Default` value for `bool`):
/// ```rust,ignore
/// be_fun: bool {
/// methods: {
/// /// Ask `bindgen` to be fun. This option is disabled by default.
/// fn be_fun(mut self) -> Self {
/// self.options.be_fun = true;
/// self
/// }
/// },
/// as_args: "--be-fun",
/// }
/// ```
///
/// However, we could also set the `be_fun` field to `true` by default and use a `--not-fun` flag
/// instead. This means that we have to add the `default` item and use a closure in the `as_args`
/// item:
/// ```rust,ignore
/// be_fun: bool {
/// default: true,
/// methods: {
/// /// Ask `bindgen` to not be fun. `bindgen` is fun by default.
/// fn not_fun(mut self) -> Self {
/// self.options.be_fun = false;
/// self
/// }
/// },
/// as_args: |be_fun, args| (!be_fun).as_args(args, "--not-fun"),
/// }
/// ```
/// More complex examples can be found in the sole invocation of this macro.
macro_rules! options {
($(
$(#[doc = $docs:literal])+
$field:ident: $ty:ty {
$(default: $default:expr,)?
methods: {$($methods_tokens:tt)*}$(,)?
as_args: $as_args:expr$(,)?
}$(,)?
)*) => {
#[derive(Debug, Clone)]
pub(crate) struct BindgenOptions {
$($(#[doc = $docs])* pub(crate) $field: $ty,)*
}
impl Default for BindgenOptions {
fn default() -> Self {
Self {
$($field: default!($($default)*),)*
}
}
}
impl Builder {
/// Generates the command line flags used to create this [`Builder`].
pub fn command_line_flags(&self) -> Vec<String> {
let mut args = vec![];
let headers = match self.options.input_headers.split_last() {
Some((header, headers)) => {
// The last input header is passed as an argument in the first position.
args.push(header.clone());
headers
},
None => &[]
};
$({
let func: fn(&$ty, &mut Vec<String>) = as_args!($as_args);
func(&self.options.$field, &mut args);
})*
// Add the `--experimental` flag if `bindgen` is built with the `experimental`
// feature.
if cfg!(feature = "experimental") {
args.push("--experimental".to_owned());
}
// Add all the clang arguments.
args.push("--".to_owned());
if !self.options.clang_args.is_empty() {
args.extend_from_slice(&self.options.clang_args);
}
// We need to pass all but the last header via the `-include` clang argument.
for header in headers {
args.push("-include".to_owned());
args.push(header.clone());
}
args
}
$($($methods_tokens)*)*
}
};
}
options! {
/// Types that have been blocklisted and should not appear anywhere in the generated code.
blocklisted_types: RegexSet {
methods: {
regex_option! {
/// Do not generate any bindings for the given type.
pub fn blocklist_type<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.blocklisted_types.insert(arg);
self
}
}
},
as_args: "--blocklist-type",
},
/// Functions that have been blocklisted and should not appear in the generated code.
blocklisted_functions: RegexSet {
methods: {
regex_option! {
/// Do not generate any bindings for the given function.
pub fn blocklist_function<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.blocklisted_functions.insert(arg);
self
}
}
},
as_args: "--blocklist-function",
},
/// Items that have been blocklisted and should not appear in the generated code.
blocklisted_items: RegexSet {
methods: {
regex_option! {
/// Do not generate any bindings for the given item, regardless of whether it is a
/// type, function, module, etc.
pub fn blocklist_item<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.blocklisted_items.insert(arg);
self
}
}
},
as_args: "--blocklist-item",
},
/// Files whose contents should be blocklisted and should not appear in the generated code.
blocklisted_files: RegexSet {
methods: {
regex_option! {
/// Do not generate any bindings for the contents of the given file, regardless of
/// whether the contents of the file are types, functions, modules, etc.
pub fn blocklist_file<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.blocklisted_files.insert(arg);
self
}
}
},
as_args: "--blocklist-file",
},
/// Types that should be treated as opaque structures in the generated code.
opaque_types: RegexSet {
methods: {
regex_option! {
/// Treat the given type as opaque in the generated bindings.
///
/// Opaque in this context means that none of the generated bindings will contain
/// information about the inner representation of the type and the type itself will
/// be represented as a chunk of bytes with the alignment and size of the type.
pub fn opaque_type<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.opaque_types.insert(arg);
self
}
}
},
as_args: "--opaque-type",
},
/// The explicit `rustfmt` path.
rustfmt_path: Option<PathBuf> {
methods: {
/// Set an explicit path to the `rustfmt` binary.
///
/// This option only comes into effect if `rustfmt` is set to be the formatter used by
/// `bindgen`. Check the documentation of the [`Builder::formatter`] method for more
/// information.
pub fn with_rustfmt<P: Into<PathBuf>>(mut self, path: P) -> Self {
self.options.rustfmt_path = Some(path.into());
self
}
},
// This option cannot be set from the CLI.
as_args: ignore,
},
/// The path to which we should write a Makefile-syntax depfile (if any).
depfile: Option<DepfileSpec> {
methods: {
/// Add a depfile output which will be written alongside the generated bindings.
pub fn depfile<H: Into<String>, D: Into<PathBuf>>(
mut self,
output_module: H,
depfile: D,
) -> Builder {
self.options.depfile = Some(DepfileSpec {
output_module: output_module.into(),
depfile_path: depfile.into(),
});
self
}
},
as_args: |depfile, args| {
if let Some(depfile) = depfile {
args.push("--depfile".into());
args.push(depfile.depfile_path.display().to_string());
}
},
},
/// Types that have been allowlisted and should appear in the generated code.
allowlisted_types: RegexSet {
methods: {
regex_option! {
/// Generate bindings for the given type.
///
/// This option is transitive by default. Check the documentation of the
/// [`Builder::allowlist_recursively`] method for further information.
pub fn allowlist_type<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.allowlisted_types.insert(arg);
self
}
}
},
as_args: "--allowlist-type",
},
/// Functions that have been allowlisted and should appear in the generated code.
allowlisted_functions: RegexSet {
methods: {
regex_option! {
/// Generate bindings for the given function.
///
/// This option is transitive by default. Check the documentation of the
/// [`Builder::allowlist_recursively`] method for further information.
pub fn allowlist_function<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.allowlisted_functions.insert(arg);
self
}
}
},
as_args: "--allowlist-function",
},
/// Variables that have been allowlisted and should appear in the generated code.
allowlisted_vars: RegexSet {
methods: {
regex_option! {
/// Generate bindings for the given variable.
///
/// This option is transitive by default. Check the documentation of the
/// [`Builder::allowlist_recursively`] method for further information.
pub fn allowlist_var<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.allowlisted_vars.insert(arg);
self
}
}
},
as_args: "--allowlist-var",
},
/// Files whose contents have been allowlisted and should appear in the generated code.
allowlisted_files: RegexSet {
methods: {
regex_option! {
/// Generate bindings for the content of the given file.
///
/// This option is transitive by default. Check the documentation of the
/// [`Builder::allowlist_recursively`] method for further information.
pub fn allowlist_file<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.allowlisted_files.insert(arg);
self
}
}
},
as_args: "--allowlist-file",
},
/// The default style of for generated `enum`s.
default_enum_style: EnumVariation {
methods: {
/// Set the default style for generated `enum`s.
///
/// If this method is not called, the [`EnumVariation::Consts`] style will be used by
/// default.
///
/// To set the style for individual `enum`s, use [`Builder::bitfield_enum`],
/// [`Builder::newtype_enum`], [`Builder::newtype_global_enum`],
/// [`Builder::rustified_enum`], [`Builder::rustified_non_exhaustive_enum`],
/// [`Builder::constified_enum_module`] or [`Builder::constified_enum`].
pub fn default_enum_style(
mut self,
arg: EnumVariation,
) -> Builder {
self.options.default_enum_style = arg;
self
}
},
as_args: |variation, args| {
if *variation != Default::default() {
args.push("--default-enum-style".to_owned());
args.push(variation.to_string());
}
},
},
/// `enum`s marked as bitfield-like. This is, newtypes with bitwise operations.
bitfield_enums: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as being bitfield-like.
///
/// This is similar to the [`Builder::newtype_enum`] style, but with the bitwise
/// operators implemented.
pub fn bitfield_enum<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.bitfield_enums.insert(arg);
self
}
}
},
as_args: "--bitfield-enum",
},
/// `enum`s marked as newtypes.
newtype_enums: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as a newtype.
///
/// This means that an integer newtype will be declared to represent the `enum`
/// type and its variants will be represented as constants inside of this type's
/// `impl` block.
pub fn newtype_enum<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.newtype_enums.insert(arg);
self
}
}
},
as_args: "--newtype-enum",
},
/// `enum`s marked as global newtypes .
newtype_global_enums: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as a global newtype.
///
/// This is similar to the [`Builder::newtype_enum`] style, but the constants for
/// each variant are free constants instead of being declared inside an `impl`
/// block for the newtype.
pub fn newtype_global_enum<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.newtype_global_enums.insert(arg);
self
}
}
},
as_args: "--newtype-global-enum",
},
/// `enum`s marked as Rust `enum`s.
rustified_enums: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as a Rust `enum`.
///
/// This means that each variant of the `enum` will be represented as a Rust `enum`
/// variant.
///
/// **Use this with caution**, creating an instance of a Rust `enum` with an
/// invalid value will cause undefined behaviour. To avoid this, use the
/// [`Builder::newtype_enum`] style instead.
pub fn rustified_enum<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.rustified_enums.insert(arg);
self
}
}
},
as_args: "--rustified-enum",
},
/// `enum`s marked as non-exhaustive Rust `enum`s.
rustified_non_exhaustive_enums: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as a non-exhaustive Rust `enum`.
///
/// This is similar to the [`Builder::rustified_enum`] style, but the `enum` is
/// tagged with the `#[non_exhaustive]` attribute.
pub fn rustified_non_exhaustive_enum<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.rustified_non_exhaustive_enums.insert(arg);
self
}
}
},
as_args: "--rustified-non-exhaustive-enums",
},
/// `enum`s marked as modules of constants.
constified_enum_modules: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as a module with a set of integer constants.
pub fn constified_enum_module<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.constified_enum_modules.insert(arg);
self
}
}
},
as_args: "--constified-enum-module",
},
/// `enum`s marked as a set of constants.
constified_enums: RegexSet {
methods: {
regex_option! {
/// Mark the given `enum` as a set o integer constants.
///
/// This is similar to the [`Builder::constified_enum_module`] style, but the
/// constants are generated in the current module instead of in a new module.
pub fn constified_enum<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.constified_enums.insert(arg);
self
}
}
},
as_args: "--constified-enum",
},
/// The default type signedness for C macro constants.
default_macro_constant_type: MacroTypeVariation {
methods: {
/// Set the default type signedness to be used for macro constants.
///
/// If this method is not called, [`MacroTypeVariation::Unsigned`] is used by default.
///
/// To set the type for individual macro constants, use the
/// [`ParseCallbacks::int_macro`] method.
pub fn default_macro_constant_type(mut self, arg: MacroTypeVariation) -> Builder {
self.options.default_macro_constant_type = arg;
self
}
},
as_args: |variation, args| {
if *variation != Default::default() {
args.push("--default-macro-constant-type".to_owned());
args.push(variation.to_string());
}
},
},
/// The default style of code generation for `typedef`s.
default_alias_style: AliasVariation {
methods: {
/// Set the default style of code generation for `typedef`s.
///
/// If this method is not called, the [`AliasVariation::TypeAlias`] style is used by
/// default.
///
/// To set the style for individual `typedefs`s, use [`Builder::type_alias`],
/// [`Builder::new_type_alias`] or [`Builder::new_type_alias_deref`].
pub fn default_alias_style(
mut self,
arg: AliasVariation,
) -> Builder {
self.options.default_alias_style = arg;
self
}
},
as_args: |variation, args| {
if *variation != Default::default() {
args.push("--default-alias-style".to_owned());
args.push(variation.to_string());
}
},
},
/// `typedef` patterns that will use regular type aliasing.
type_alias: RegexSet {
methods: {
regex_option! {
/// Mark the given `typedef` as a regular Rust `type` alias.
///
/// This is the default behavior, meaning that this method only comes into effect
/// if a style different from [`AliasVariation::TypeAlias`] was passed to the
/// [`Builder::default_alias_style`] method.
pub fn type_alias<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.type_alias.insert(arg);
self
}
}
},
as_args: "--type-alias",
},
/// `typedef` patterns that will be aliased by creating a newtype.
new_type_alias: RegexSet {
methods: {
regex_option! {
/// Mark the given `typedef` as a Rust newtype by having the aliased
/// type be wrapped in a `struct` with `#[repr(transparent)]`.
///
/// This method can be used to enforce stricter type checking.
pub fn new_type_alias<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.new_type_alias.insert(arg);
self
}
}
},
as_args: "--new-type-alias",
},
/// `typedef` patterns that will be wrapped in a newtype implementing `Deref` and `DerefMut`.
new_type_alias_deref: RegexSet {
methods: {
regex_option! {
/// Mark the given `typedef` to be generated as a newtype that can be dereferenced.
///
/// This is similar to the [`Builder::new_type_alias`] style, but the newtype
/// implements `Deref` and `DerefMut` with the aliased type as a target.
pub fn new_type_alias_deref<T: AsRef<str>>(mut self, arg: T) -> Builder {
self.options.new_type_alias_deref.insert(arg);
self
}
}
},
as_args: "--new-type-alias-deref",
},
/// The default style of code to generate for `union`s containing non-`Copy` members.
default_non_copy_union_style: NonCopyUnionStyle {
methods: {
/// Set the default style of code to generate for `union`s with non-`Copy` members.
///
/// If this method is not called, the [`NonCopyUnionStyle::BindgenWrapper`] style is
/// used by default.
///
/// To set the style for individual `union`s, use [`Builder::bindgen_wrapper_union`] or
/// [`Builder::manually_drop_union`].
pub fn default_non_copy_union_style(mut self, arg: NonCopyUnionStyle) -> Self {
self.options.default_non_copy_union_style = arg;
self
}
},
as_args: |style, args| {
if *style != Default::default() {
args.push("--default-non-copy-union-style".to_owned());
args.push(style.to_string());
}
},
},
/// The patterns marking non-`Copy` `union`s as using the `bindgen` generated wrapper.
bindgen_wrapper_union: RegexSet {
methods: {
regex_option! {
/// Mark the given `union` to use a `bindgen`-generated wrapper for its members if at
/// least one them is not `Copy`.
///
/// This is the default behavior, meaning that this method only comes into effect
/// if a style different from [`NonCopyUnionStyle::BindgenWrapper`] was passed to
/// the [`Builder::default_non_copy_union_style`] method.
pub fn bindgen_wrapper_union<T: AsRef<str>>(mut self, arg: T) -> Self {
self.options.bindgen_wrapper_union.insert(arg);
self
}
}
},
as_args: "--bindgen-wrapper-union",
},
/// The patterns marking non-`Copy` `union`s as using the `ManuallyDrop` wrapper.
manually_drop_union: RegexSet {
methods: {
regex_option! {
/// Mark the given `union` to use [`::core::mem::ManuallyDrop`] for its members if
/// at least one of them is not `Copy`.
///
/// The `ManuallyDrop` type was stabilized in Rust 1.20.0, do not use this option
/// if your target version is lower than this.
pub fn manually_drop_union<T: AsRef<str>>(mut self, arg: T) -> Self {
self.options.manually_drop_union.insert(arg);
self
}
}
},
as_args: "--manually-drop-union",
},
/// Whether we should generate built-in definitions.
builtins: bool {
methods: {
/// Generate Rust bindings for built-in definitions (for example `__builtin_va_list`).
///
/// Bindings for built-in definitions are not emitted by default.
pub fn emit_builtins(mut self) -> Builder {
self.options.builtins = true;
self
}
},
as_args: "--builtins",
},
/// Whether we should dump the Clang AST for debugging purposes.
emit_ast: bool {
methods: {
/// Emit the Clang AST to `stdout` for debugging purposes.
///
/// The Clang AST is not emitted by default.
pub fn emit_clang_ast(mut self) -> Builder {
self.options.emit_ast = true;
self
}
},
as_args: "--emit-clang-ast",
},
/// Whether we should dump our IR for debugging purposes.
emit_ir: bool {
methods: {
/// Emit the `bindgen` internal representation to `stdout` for debugging purposes.
///
/// This internal representation is not emitted by default.
pub fn emit_ir(mut self) -> Builder {
self.options.emit_ir = true;
self
}
},
as_args: "--emit-ir",
},
/// Output path for the `graphviz` DOT file.
emit_ir_graphviz: Option<String> {
methods: {
/// Set the path for the file where the`bindgen` internal representation will be
/// emitted as a graph using the `graphviz` DOT language.
///
/// This graph representation is not emitted by default.
pub fn emit_ir_graphviz<T: Into<String>>(mut self, path: T) -> Builder {
let path = path.into();
self.options.emit_ir_graphviz = Some(path);
self
}
},
as_args: "--emit-ir-graphviz",
},
/// Whether we should emulate C++ namespaces with Rust modules.
enable_cxx_namespaces: bool {
methods: {
/// Emulate C++ namespaces using Rust modules in the generated bindings.
///
/// C++ namespaces are not emulated by default.
pub fn enable_cxx_namespaces(mut self) -> Builder {
self.options.enable_cxx_namespaces = true;
self
}
},
as_args: "--enable-cxx-namespaces",
},
/// Whether we should try to find unexposed attributes in functions.
enable_function_attribute_detection: bool {
methods: {
/// Enable detecting function attributes on C functions.
///
/// This enables the following features:
/// - Add `#[must_use]` attributes to Rust items whose C counterparts are marked as so.
/// This feature also requires that the Rust target version supports the attribute.
/// - Set `!` as the return type for Rust functions whose C counterparts are marked as
/// diverging.
///
/// This option can be quite slow in some cases (check [#1465]), so it is disabled by
/// default.
///
/// [#1465]: https://github.com/rust-lang/rust-bindgen/issues/1465
pub fn enable_function_attribute_detection(mut self) -> Self {
self.options.enable_function_attribute_detection = true;
self
}
},
as_args: "--enable-function-attribute-detection",
},
/// Whether we should avoid mangling names with namespaces.
disable_name_namespacing: bool {
methods: {
/// Disable name auto-namespacing.
///
/// By default, `bindgen` mangles names like `foo::bar::Baz` to look like `foo_bar_Baz`
/// instead of just `Baz`. This method disables that behavior.
///
/// Note that this does not change the names used for allowlisting and blocklisting,
/// which should still be mangled with the namespaces. Additionally, this option may
/// cause `bindgen` to generate duplicate names.
pub fn disable_name_namespacing(mut self) -> Builder {
self.options.disable_name_namespacing = true;
self
}
},
as_args: "--disable-name-namespacing",
},
/// Whether we should avoid generating nested `struct` names.
disable_nested_struct_naming: bool {
methods: {
/// Disable nested `struct` naming.
///
/// The following `struct`s have different names for C and C++. In C, they are visible
/// as `foo` and `bar`. In C++, they are visible as `foo` and `foo::bar`.
///
/// ```c
/// struct foo {
/// struct bar {
/// } b;
/// };
/// ```
///
/// `bindgen` tries to avoid duplicate names by default, so it follows the C++ naming
/// convention and it generates `foo` and `foo_bar` instead of just `foo` and `bar`.
///
/// This method disables this behavior and it is indented to be used only for headers
/// that were written in C.
pub fn disable_nested_struct_naming(mut self) -> Builder {
self.options.disable_nested_struct_naming = true;
self
}
},
as_args: "--disable-nested-struct-naming",
},
/// Whether we should avoid embedding version identifiers into source code.
disable_header_comment: bool {
methods: {
/// Do not insert the `bindgen` version identifier into the generated bindings.
///
/// This identifier is inserted by default.
pub fn disable_header_comment(mut self) -> Self {
self.options.disable_header_comment = true;
self
}
},
as_args: "--disable-header-comment",
},
/// Whether we should generate layout tests for generated `struct`s.
layout_tests: bool {
default: true,
methods: {
/// Set whether layout tests should be generated.
///
/// Layout tests are generated by default.
pub fn layout_tests(mut self, doit: bool) -> Self {
self.options.layout_tests = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-layout-tests"),
},
/// Whether we should implement `Debug` for types that cannot derive it.
impl_debug: bool {
methods: {
/// Set whether `Debug` should be implemented for types that cannot derive it.
///
/// This option is disabled by default.
pub fn impl_debug(mut self, doit: bool) -> Self {
self.options.impl_debug = doit;
self
}
},
as_args: "--impl-debug",
},
/// Whether we should implement `PartialEq` types that cannot derive it.
impl_partialeq: bool {
methods: {
/// Set whether `PartialEq` should be implemented for types that cannot derive it.
///
/// This option is disabled by default.
pub fn impl_partialeq(mut self, doit: bool) -> Self {
self.options.impl_partialeq = doit;
self
}
},
as_args: "--impl-partialeq",
},
/// Whether we should derive `Copy` when possible.
derive_copy: bool {
default: true,
methods: {
/// Set whether the `Copy` trait should be derived when possible.
///
/// `Copy` is derived by default.
pub fn derive_copy(mut self, doit: bool) -> Self {
self.options.derive_copy = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-derive-copy"),
},
/// Whether we should derive `Debug` when possible.
derive_debug: bool {
default: true,
methods: {
/// Set whether the `Debug` trait should be derived when possible.
///
/// The [`Builder::impl_debug`] method can be used to implement `Debug` for types that
/// cannot derive it.
///
/// `Debug` is derived by default.
pub fn derive_debug(mut self, doit: bool) -> Self {
self.options.derive_debug = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-derive-debug"),
},
/// Whether we should derive `Default` when possible.
derive_default: bool {
methods: {
/// Set whether the `Default` trait should be derived when possible.
///
/// `Default` is not derived by default.
pub fn derive_default(mut self, doit: bool) -> Self {
self.options.derive_default = doit;
self
}
},
as_args: |&value, args| {
let arg = if value {
"--with-derive-default"
} else {
"--no-derive-default"
};
args.push(arg.to_owned());
},
},
/// Whether we should derive `Hash` when possible.
derive_hash: bool {
methods: {
/// Set whether the `Hash` trait should be derived when possible.
///
/// `Hash` is not derived by default.
pub fn derive_hash(mut self, doit: bool) -> Self {
self.options.derive_hash = doit;
self
}
},
as_args: "--with-derive-hash",
},
/// Whether we should derive `PartialOrd` when possible.
derive_partialord: bool {
methods: {
/// Set whether the `PartialOrd` trait should be derived when possible.
///
/// Take into account that `Ord` cannot be derived for a type that does not implement
/// `PartialOrd`. For this reason, setting this method to `false` also sets
/// automatically [`Builder::derive_ord`] to `false`.
///
/// `PartialOrd` is not derived by default.
pub fn derive_partialord(mut self, doit: bool) -> Self {
self.options.derive_partialord = doit;
if !doit {
self.options.derive_ord = false;
}
self
}
},
as_args: "--with-derive-partialord",
},
/// Whether we should derive `Ord` when possible.
derive_ord: bool {
methods: {
/// Set whether the `Ord` trait should be derived when possible.
///
/// Take into account that `Ord` cannot be derived for a type that does not implement
/// `PartialOrd`. For this reason, the value set with this method will also be set
/// automatically for [`Builder::derive_partialord`].
///
/// `Ord` is not derived by default.
pub fn derive_ord(mut self, doit: bool) -> Self {
self.options.derive_ord = doit;
self.options.derive_partialord = doit;
self
}
},
as_args: "--with-derive-ord",
},
/// Whether we should derive `PartialEq` when possible.
derive_partialeq: bool {
methods: {
/// Set whether the `PartialEq` trait should be derived when possible.
///
/// Take into account that `Eq` cannot be derived for a type that does not implement
/// `PartialEq`. For this reason, setting this method to `false` also sets
/// automatically [`Builder::derive_eq`] to `false`.
///
/// The [`Builder::impl_partialeq`] method can be used to implement `PartialEq` for
/// types that cannot derive it.
///
/// `PartialEq` is not derived by default.
pub fn derive_partialeq(mut self, doit: bool) -> Self {
self.options.derive_partialeq = doit;
if !doit {
self.options.derive_eq = false;
}
self
}
},
as_args: "--with-derive-partialeq",
},
/// Whether we should derive `Eq` when possible.
derive_eq: bool {
methods: {
/// Set whether the `Eq` trait should be derived when possible.
///
/// Take into account that `Eq` cannot be derived for a type that does not implement
/// `PartialEq`. For this reason, the value set with this method will also be set
/// automatically for [`Builder::derive_partialeq`].
///
/// `Eq` is not derived by default.
pub fn derive_eq(mut self, doit: bool) -> Self {
self.options.derive_eq = doit;
if doit {
self.options.derive_partialeq = doit;
}
self
}
},
as_args: "--with-derive-eq",
},
/// Whether we should use `core` instead of `std`.
///
/// If this option is enabled and the Rust target version is greater than 1.64, the prefix for
/// C platform-specific types will be `::core::ffi` instead of `::core::os::raw`.
use_core: bool {
methods: {
/// Use `core` instead of `std` in the generated bindings.
///
/// `std` is used by default.
pub fn use_core(mut self) -> Builder {
self.options.use_core = true;
self
}
},
as_args: "--use-core",
},
/// An optional prefix for the C platform-specific types.
ctypes_prefix: Option<String> {
methods: {
/// Use the given prefix for the C platform-specific types instead of `::std::os::raw`.
///
/// Alternatively, the [`Builder::use_core`] method can be used to set the prefix to
/// `::core::ffi` or `::core::os::raw`.
pub fn ctypes_prefix<T: Into<String>>(mut self, prefix: T) -> Builder {
self.options.ctypes_prefix = Some(prefix.into());
self
}
},
as_args: "--ctypes-prefix",
},
/// The prefix for anonymous fields.
anon_fields_prefix: String {
default: DEFAULT_ANON_FIELDS_PREFIX.into(),
methods: {
/// Use the given prefix for the anonymous fields.
///
/// An anonymous field, is a field of a C/C++ type that does not have a name. For
/// example, in the following C code:
/// ```c
/// struct integer {
/// struct {
/// int inner;
/// };
/// }
/// ```
///
/// The only field of the `integer` `struct` is an anonymous field and its Rust
/// representation will be named using this prefix followed by an integer identifier.
///
/// The default prefix is `__bindgen_anon_`.
pub fn anon_fields_prefix<T: Into<String>>(mut self, prefix: T) -> Builder {
self.options.anon_fields_prefix = prefix.into();
self
}
},
as_args: |prefix, args| {
if prefix != DEFAULT_ANON_FIELDS_PREFIX {
args.push("--anon-fields-prefix".to_owned());
args.push(prefix.clone());
}
},
},
/// Whether to measure the time for each one of the `bindgen` phases.
time_phases: bool {
methods: {
/// Set whether to measure the elapsed time for each one of the `bindgen` phases. This
/// information is printed to `stderr`.
///
/// The elapsed time is not measured by default.
pub fn time_phases(mut self, doit: bool) -> Self {
self.options.time_phases = doit;
self
}
},
as_args: "--time-phases",
},
/// Whether to convert C float types to `f32` and `f64`.
convert_floats: bool {
default: true,
methods: {
/// Avoid converting C float types to `f32` and `f64`.
pub fn no_convert_floats(mut self) -> Self {
self.options.convert_floats = false;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-convert-floats"),
},
/// The set of raw lines to be prepended to the top-level module of the generated Rust code.
raw_lines: Vec<String> {
methods: {
/// Add a line of Rust code at the beginning of the generated bindings. The string is
/// passed through without any modification.
pub fn raw_line<T: Into<String>>(mut self, arg: T) -> Self {
self.options.raw_lines.push(arg.into());
self
}
},
as_args: |raw_lines, args| {
for line in raw_lines {
args.push("--raw-line".to_owned());
args.push(line.clone());
}
},
},
/// The set of raw lines to prepend to different modules.
module_lines: HashMap<String, Vec<String>> {
methods: {
/// Add a given line to the beginning of a given module.
///
/// This option only comes into effect if the [`Builder::enable_cxx_namespaces`] method
/// is also being called.
pub fn module_raw_line<T, U>(mut self, module: T, line: U) -> Self
where
T: Into<String>,
U: Into<String>,
{
self.options
.module_lines
.entry(module.into())
.or_insert_with(Vec::new)
.push(line.into());
self
}
},
as_args: |module_lines, args| {
for (module, lines) in module_lines {
for line in lines.iter() {
args.push("--module-raw-line".to_owned());
args.push(module.clone());
args.push(line.clone());
}
}
},
},
/// The input header files.
input_headers: Vec<String> {
methods: {
/// Add an input C/C++ header to generate bindings for.
///
/// This can be used to generate bindings for a single header:
///
/// ```ignore
/// let bindings = bindgen::Builder::default()
/// .header("input.h")
/// .generate()
/// .unwrap();
/// ```
///
/// Or for multiple headers:
///
/// ```ignore
/// let bindings = bindgen::Builder::default()
/// .header("first.h")
/// .header("second.h")
/// .header("third.h")
/// .generate()
/// .unwrap();
/// ```
pub fn header<T: Into<String>>(mut self, header: T) -> Builder {
self.options.input_headers.push(header.into());
self
}
},
// This field is handled specially inside the macro.
as_args: ignore,
},
/// The set of arguments to be passed straight through to Clang.
clang_args: Vec<String> {
methods: {
/// Add an argument to be passed straight through to Clang.
pub fn clang_arg<T: Into<String>>(self, arg: T) -> Builder {
self.clang_args([arg.into()])
}
/// Add several arguments to be passed straight through to Clang.
pub fn clang_args<I: IntoIterator>(mut self, args: I) -> Builder
where
I::Item: AsRef<str>,
{
for arg in args {
self.options.clang_args.push(arg.as_ref().to_owned());
}
self
}
},
// This field is handled specially inside the macro.
as_args: ignore,
},
/// Tuples of unsaved file contents of the form (name, contents).
input_header_contents: Vec<(String, String)> {
methods: {
/// Add `contents` as an input C/C++ header named `name`.
///
/// This can be used to inject additional C/C++ code as an input without having to
/// create additional header files.
pub fn header_contents(mut self, name: &str, contents: &str) -> Builder {
// Apparently clang relies on having virtual FS correspondent to
// the real one, so we need absolute paths here
let absolute_path = env::current_dir()
.expect("Cannot retrieve current directory")
.join(name)
.to_str()
.expect("Cannot convert current directory name to string")
.to_owned();
self.options
.input_header_contents
.push((absolute_path, contents.into()));
self
}
},
// Header contents cannot be added from the CLI.
as_args: ignore,
},
/// A user-provided visitor to allow customizing different kinds of situations.
parse_callbacks: Vec<Rc<dyn ParseCallbacks>> {
methods: {
/// Add a new [`ParseCallbacks`] instance to configure types in different situations.
pub fn parse_callbacks(mut self, cb: Box<dyn ParseCallbacks>) -> Self {
self.options.parse_callbacks.push(Rc::from(cb));
self
}
},
as_args: |_callbacks, _args| {
#[cfg(feature = "__cli")]
for cb in _callbacks {
_args.extend(cb.cli_args());
}
},
},
/// Which kind of items should we generate. We generate all of them by default.
codegen_config: CodegenConfig {
default: CodegenConfig::all(),
methods: {
/// Do not generate any functions.
///
/// Functions are generated by default.
pub fn ignore_functions(mut self) -> Builder {
self.options.codegen_config.remove(CodegenConfig::FUNCTIONS);
self
}
/// Do not generate any methods.
///
/// Methods are generated by default.
pub fn ignore_methods(mut self) -> Builder {
self.options.codegen_config.remove(CodegenConfig::METHODS);
self
}
/// Choose what to generate using a [`CodegenConfig`].
///
/// This option overlaps with [`Builder::ignore_functions`] and
/// [`Builder::ignore_methods`].
///
/// All the items in `CodegenConfig` are generated by default.
pub fn with_codegen_config(mut self, config: CodegenConfig) -> Self {
self.options.codegen_config = config;
self
}
},
as_args: |codegen_config, args| {
if !codegen_config.functions() {
args.push("--ignore-functions".to_owned());
}
args.push("--generate".to_owned());
//Temporary placeholder for the 4 options below.
let mut options: Vec<String> = Vec::new();
if codegen_config.functions() {
options.push("functions".to_owned());
}
if codegen_config.types() {
options.push("types".to_owned());
}
if codegen_config.vars() {
options.push("vars".to_owned());
}
if codegen_config.methods() {
options.push("methods".to_owned());
}
if codegen_config.constructors() {
options.push("constructors".to_owned());
}
if codegen_config.destructors() {
options.push("destructors".to_owned());
}
args.push(options.join(","));
if !codegen_config.methods() {
args.push("--ignore-methods".to_owned());
}
},
},
/// Whether to treat inline namespaces conservatively.
conservative_inline_namespaces: bool {
methods: {
/// Treat inline namespaces conservatively.
///
/// This is tricky, because in C++ is technically legal to override an item
/// defined in an inline namespace:
///
/// ```cpp
/// inline namespace foo {
/// using Bar = int;
/// }
/// using Bar = long;
/// ```
///
/// Even though referencing `Bar` is a compiler error.
///
/// We want to support this (arguably esoteric) use case, but we do not want to make
/// the rest of `bindgen` users pay an usability penalty for that.
///
/// To support this, we need to keep all the inline namespaces around, but then using
/// `bindgen` becomes a bit more difficult, because you cannot reference paths like
/// `std::string` (you'd need to use the proper inline namespace).
///
/// We could complicate a lot of the logic to detect name collisions and, in the
/// absence of collisions, generate a `pub use inline_ns::*` or something like that.
///
/// That is probably something we can do to improve the usability of this option if we
/// realize it is needed way more often. Our guess is that this extra logic is not
/// going to be very useful.
///
/// This option is disabled by default.
pub fn conservative_inline_namespaces(mut self) -> Builder {
self.options.conservative_inline_namespaces = true;
self
}
},
as_args: "--conservative-inline-namespaces",
},
/// Whether to keep documentation comments in the generated output.
generate_comments: bool {
default: true,
methods: {
/// Set whether the generated bindings should contain documentation comments.
///
/// Documentation comments are included by default.
///
/// Note that clang excludes comments from system headers by default, pass
/// `"-fretain-comments-from-system-headers"` to the [`Builder::clang_arg`] method to
/// include them.
///
/// It is also possible to process all comments and not just documentation using the
/// `"-fparse-all-comments"` flag. Check [these slides on clang comment parsing](
/// https://llvm.org/devmtg/2012-11/Gribenko_CommentParsing.pdf) for more information
/// and examples.
pub fn generate_comments(mut self, doit: bool) -> Self {
self.options.generate_comments = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-doc-comments"),
},
/// Whether to generate inline functions.
generate_inline_functions: bool {
methods: {
/// Set whether to generate inline functions.
///
/// This option is disabled by default.
///
/// Note that they will usually not work. However you can use `-fkeep-inline-functions`
/// or `-fno-inline-functions` if you are responsible of compiling the library to make
/// them callable.
#[cfg_attr(
features = "experimental",
doc = "\nCheck the [`Builder::wrap_static_fns`] method for an alternative."
)]
pub fn generate_inline_functions(mut self, doit: bool) -> Self {
self.options.generate_inline_functions = doit;
self
}
},
as_args: "--generate-inline-functions",
},
/// Whether to allowlist types recursively.
allowlist_recursively: bool {
default: true,
methods: {
/// Set whether to recursively allowlist items.
///
/// Items are allowlisted recursively by default.
///
/// Given that we have explicitly allowlisted the `initiate_dance_party` function in
/// this C header:
///
/// ```c
/// typedef struct MoonBoots {
/// int bouncy_level;
/// } MoonBoots;
///
/// void initiate_dance_party(MoonBoots* boots);
/// ```
///
/// We would normally generate bindings to both the `initiate_dance_party` function and
/// the `MoonBoots` type that it transitively references. If `false` is passed to this
/// method, `bindgen` will not emit bindings for anything except the explicitly
/// allowlisted items, meaning that the definition for `MoonBoots` would not be
/// generated. However, the `initiate_dance_party` function would still reference
/// `MoonBoots`!
///
/// **Disabling this feature will almost certainly cause `bindgen` to emit bindings
/// that will not compile!** If you disable this feature, then it is *your*
/// responsibility to provide definitions for every type that is referenced from an
/// explicitly allowlisted item. One way to provide the missing definitions is by using
/// the [`Builder::raw_line`] method, another would be to define them in Rust and then
/// `include!(...)` the bindings immediately afterwards.
pub fn allowlist_recursively(mut self, doit: bool) -> Self {
self.options.allowlist_recursively = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-recursive-allowlist"),
},
/// Whether to emit `#[macro_use] extern crate objc;` instead of `use objc;` in the prologue of
/// the files generated from objective-c files.
objc_extern_crate: bool {
methods: {
/// Emit `#[macro_use] extern crate objc;` instead of `use objc;` in the prologue of
/// the files generated from objective-c files.
///
/// `use objc;` is emitted by default.
pub fn objc_extern_crate(mut self, doit: bool) -> Self {
self.options.objc_extern_crate = doit;
self
}
},
as_args: "--objc-extern-crate",
},
/// Whether to generate proper block signatures instead of `void` pointers.
generate_block: bool {
methods: {
/// Generate proper block signatures instead of `void` pointers.
///
/// `void` pointers are used by default.
pub fn generate_block(mut self, doit: bool) -> Self {
self.options.generate_block = doit;
self
}
},
as_args: "--generate-block",
},
/// Whether to emit `#[macro_use] extern crate block;` instead of `use block;` in the prologue
/// of the files generated from apple block files.
block_extern_crate: bool {
methods: {
/// Emit `#[macro_use] extern crate block;` instead of `use block;` in the prologue of
/// the files generated from apple block files.
///
/// `use block;` is emitted by default.
pub fn block_extern_crate(mut self, doit: bool) -> Self {
self.options.block_extern_crate = doit;
self
}
},
as_args: "--block-extern-crate",
},
/// Whether to use the clang-provided name mangling.
enable_mangling: bool {
default: true,
methods: {
/// Set whether to use the clang-provided name mangling. This is probably needed for
/// C++ features.
///
/// The mangling provided by clang is used by default.
///
/// We allow disabling this option because some old `libclang` versions seem to return
/// incorrect results in some cases for non-mangled functions, check [#528] for more
/// information.
///
/// [#528]: https://github.com/rust-lang/rust-bindgen/issues/528
pub fn trust_clang_mangling(mut self, doit: bool) -> Self {
self.options.enable_mangling = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--distrust-clang-mangling"),
},
/// Whether to detect include paths using `clang_sys`.
detect_include_paths: bool {
default: true,
methods: {
/// Set whether to detect include paths using `clang_sys`.
///
/// `clang_sys` is used to detect include paths by default.
pub fn detect_include_paths(mut self, doit: bool) -> Self {
self.options.detect_include_paths = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-include-path-detection"),
},
/// Whether we should try to fit macro constants into types smaller than `u32` and `i32`.
fit_macro_constants: bool {
methods: {
/// Set whether `bindgen` should try to fit macro constants into types smaller than `u32`
/// and `i32`.
///
/// This option is disabled by default.
pub fn fit_macro_constants(mut self, doit: bool) -> Self {
self.options.fit_macro_constants = doit;
self
}
},
as_args: "--fit-macro-constant-types",
},
/// Whether to prepend the `enum` name to constant or newtype variants.
prepend_enum_name: bool {
default: true,
methods: {
/// Set whether to prepend the `enum` name to constant or newtype variants.
///
/// The `enum` name is prepended by default.
pub fn prepend_enum_name(mut self, doit: bool) -> Self {
self.options.prepend_enum_name = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-prepend-enum-name"),
},
/// Version of the Rust compiler to target.
rust_target: RustTarget {
methods: {
/// Specify the Rust target version.
///
/// The default target is the latest stable Rust version.
pub fn rust_target(mut self, rust_target: RustTarget) -> Self {
self.options.set_rust_target(rust_target);
self
}
},
as_args: |rust_target, args| {
args.push("--rust-target".to_owned());
args.push((*rust_target).into());
},
},
/// Features to be enabled. They are derived from `rust_target`.
rust_features: RustFeatures {
default: RustTarget::default().into(),
methods: {},
// This field cannot be set from the CLI,
as_args: ignore,
},
/// Enable support for native Rust unions if they are supported.
untagged_union: bool {
default: true,
methods: {
/// Disable support for native Rust unions, if supported.
///
/// The default value of this option is set based on the value passed to
/// [`Builder::rust_target`].
pub fn disable_untagged_union(mut self) -> Self {
self.options.untagged_union = false;
self
}
}
as_args: |value, args| (!value).as_args(args, "--disable-untagged-union"),
},
/// Whether we should record which items in the regex sets did match any C items.
record_matches: bool {
default: true,
methods: {
/// Set whether we should record which items in our regex sets did match any C items.
///
/// Matches are recorded by default.
pub fn record_matches(mut self, doit: bool) -> Self {
self.options.record_matches = doit;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-record-matches"),
},
/// Whether `size_t` should be translated to `usize` automatically.
size_t_is_usize: bool {
default: true,
methods: {
/// Set whether `size_t` should be translated to `usize`.
///
/// `size_t` is translated to `usize` by default.
pub fn size_t_is_usize(mut self, is: bool) -> Self {
self.options.size_t_is_usize = is;
self
}
},
as_args: |value, args| (!value).as_args(args, "--no-size_t-is-usize"),
},
/// The tool that should be used to format the generated bindings.
formatter: Formatter {
methods: {
/// Set whether `rustfmt` should be used to format the generated bindings.
///
/// `rustfmt` is used by default.
///
/// This method overlaps in functionality with the more general [`Builder::formatter`].
/// Thus, the latter should be preferred.
#[deprecated]
pub fn rustfmt_bindings(mut self, doit: bool) -> Self {
self.options.formatter = if doit {
Formatter::Rustfmt
} else {
Formatter::None
};
self
}
/// Set which tool should be used to format the generated bindings.
///
/// The default formatter is [`Formatter::Rustfmt`].
///
/// To be able to use `prettyplease` as a formatter, the `"prettyplease"` feature for
/// `bindgen` must be enabled in the Cargo manifest.
pub fn formatter(mut self, formatter: Formatter) -> Self {
self.options.formatter = formatter;
self
}
},
as_args: |formatter, args| {
if *formatter != Default::default() {
args.push("--formatter".to_owned());
args.push(formatter.to_string());
}
},
},
/// The absolute path to the `rustfmt` configuration file.
rustfmt_configuration_file: Option<PathBuf> {
methods: {
/// Set the absolute path to the `rustfmt` configuration file.
///
/// The default `rustfmt` options are used if `None` is passed to this method or if
/// this method is not called at all.
///
/// Calling this method will set the [`Builder::rustfmt_bindings`] option to `true`
/// and the [`Builder::formatter`] option to [`Formatter::Rustfmt`].
pub fn rustfmt_configuration_file(mut self, path: Option<PathBuf>) -> Self {
self = self.formatter(Formatter::Rustfmt);
self.options.rustfmt_configuration_file = path;
self
}
},
as_args: "--rustfmt-configuration-file",
},
/// Types that should not derive `PartialEq`.
no_partialeq_types: RegexSet {
methods: {
regex_option! {
/// Do not derive `PartialEq` for a given type.
pub fn no_partialeq<T: Into<String>>(mut self, arg: T) -> Builder {
self.options.no_partialeq_types.insert(arg.into());
self
}
}
},
as_args: "--no-partialeq",
},
/// Types that should not derive `Copy`.
no_copy_types: RegexSet {
methods: {
regex_option! {
/// Do not derive `Copy` and `Clone` for a given type.
pub fn no_copy<T: Into<String>>(mut self, arg: T) -> Self {
self.options.no_copy_types.insert(arg.into());
self
}
}
},
as_args: "--no-copy",
},
/// Types that should not derive `Debug`.
no_debug_types: RegexSet {
methods: {
regex_option! {
/// Do not derive `Debug` for a given type.
pub fn no_debug<T: Into<String>>(mut self, arg: T) -> Self {
self.options.no_debug_types.insert(arg.into());
self
}
}
},
as_args: "--no-debug",
},
/// Types that should not derive or implement `Default`.
no_default_types: RegexSet {
methods: {
regex_option! {
/// Do not derive or implement `Default` for a given type.
pub fn no_default<T: Into<String>>(mut self, arg: T) -> Self {
self.options.no_default_types.insert(arg.into());
self
}
}
},
as_args: "--no-default",
},
/// Types that should not derive `Hash`.
no_hash_types: RegexSet {
methods: {
regex_option! {
/// Do not derive `Hash` for a given type.
pub fn no_hash<T: Into<String>>(mut self, arg: T) -> Builder {
self.options.no_hash_types.insert(arg.into());
self
}
}
},
as_args: "--no-hash",
},
/// Types that should be annotated with `#[must_use]`.
must_use_types: RegexSet {
methods: {
regex_option! {
/// Annotate the given type with the `#[must_use]` attribute.
pub fn must_use_type<T: Into<String>>(mut self, arg: T) -> Builder {
self.options.must_use_types.insert(arg.into());
self
}
}
},
as_args: "--must-use-type",
},
/// Whether C arrays should be regular pointers in rust or array pointers
array_pointers_in_arguments: bool {
methods: {
/// Translate arrays `T arr[size]` into array pointers `*mut [T; size]` instead of
/// translating them as `*mut T` which is the default.
///
/// The same is done for `*const` pointers.
pub fn array_pointers_in_arguments(mut self, doit: bool) -> Self {
self.options.array_pointers_in_arguments = doit;
self
}
},
as_args: "--use-array-pointers-in-arguments",
},
/// The name of the `wasm_import_module`.
wasm_import_module_name: Option<String> {
methods: {
/// Adds the `#[link(wasm_import_module = import_name)]` attribute to all the `extern`
/// blocks generated by `bindgen`.
///
/// This attribute is not added by default.
pub fn wasm_import_module_name<T: Into<String>>(
mut self,
import_name: T,
) -> Self {
self.options.wasm_import_module_name = Some(import_name.into());
self
}
},
as_args: "--wasm-import-module-name",
},
/// The name of the dynamic library (if we are generating bindings for a shared library).
dynamic_library_name: Option<String> {
methods: {
/// Generate bindings for a shared library with the given name.
///
/// This option is disabled by default.
pub fn dynamic_library_name<T: Into<String>>(
mut self,
dynamic_library_name: T,
) -> Self {
self.options.dynamic_library_name = Some(dynamic_library_name.into());
self
}
},
as_args: "--dynamic-loading",
},
/// Whether to equire successful linkage for all routines in a shared library.
dynamic_link_require_all: bool {
methods: {
/// Set whether to require successful linkage for all routines in a shared library.
/// This allows us to optimize function calls by being able to safely assume function
/// pointers are valid.
///
/// This option only comes into effect if the [`Builder::dynamic_library_name`] option
/// is set.
///
/// This option is disabled by default.
pub fn dynamic_link_require_all(mut self, req: bool) -> Self {
self.options.dynamic_link_require_all = req;
self
}
},
as_args: "--dynamic-link-require-all",
},
/// Whether to only make generated bindings `pub` if the items would be publicly accessible by
/// C++.
respect_cxx_access_specs: bool {
methods: {
/// Set whether to respect the C++ access specifications.
///
/// Passing `true` to this method will set the visibility of the generated Rust items
/// as `pub` only if the corresponding C++ items are publicly accessible instead of
/// marking all the items as public, which is the default.
pub fn respect_cxx_access_specs(mut self, doit: bool) -> Self {
self.options.respect_cxx_access_specs = doit;
self
}
},
as_args: "--respect-cxx-access-specs",
},
/// Whether to translate `enum` integer types to native Rust integer types.
translate_enum_integer_types: bool {
methods: {
/// Set whether to always translate `enum` integer types to native Rust integer types.
///
/// Passing `true` to this method will result in `enum`s having types such as `u32` and
/// `i16` instead of `c_uint` and `c_short` which is the default. The `#[repr]` types
/// of Rust `enum`s are always translated to Rust integer types.
pub fn translate_enum_integer_types(mut self, doit: bool) -> Self {
self.options.translate_enum_integer_types = doit;
self
}
},
as_args: "--translate-enum-integer-types",
},
/// Whether to generate types with C style naming.
c_naming: bool {
methods: {
/// Set whether to generate types with C style naming.
///
/// Passing `true` to this method will add prefixes to the generated type names. For
/// example, instead of a `struct` with name `A` we will generate a `struct` with
/// `struct_A`. Currently applies to `struct`s, `union`s, and `enum`s.
pub fn c_naming(mut self, doit: bool) -> Self {
self.options.c_naming = doit;
self
}
},
as_args: "--c-naming",
},
/// Wether to always emit explicit padding fields.
force_explicit_padding: bool {
methods: {
/// Set whether to always emit explicit padding fields.
///
/// This option should be enabled if a `struct` needs to be serialized in its native
/// format (padding bytes and all). This could be required if such `struct` will be
/// written to a file or sent over the network, as anything reading the padding bytes
/// of a struct may cause undefined behavior.
///
/// Padding fields are not emitted by default.
pub fn explicit_padding(mut self, doit: bool) -> Self {
self.options.force_explicit_padding = doit;
self
}
},
as_args: "--explicit-padding",
},
/// Whether to emit vtable functions.
vtable_generation: bool {
methods: {
/// Set whether to enable experimental support to generate virtual table functions.
///
/// This option should mostly work, though some edge cases are likely to be broken.
///
/// Virtual table generation is disabled by default.
pub fn vtable_generation(mut self, doit: bool) -> Self {
self.options.vtable_generation = doit;
self
}
},
as_args: "--vtable-generation",
},
/// Whether to sort the generated Rust items.
sort_semantically: bool {
methods: {
/// Set whether to sort the generated Rust items in a predefined manner.
///
/// Items are not ordered by default.
pub fn sort_semantically(mut self, doit: bool) -> Self {
self.options.sort_semantically = doit;
self
}
},
as_args: "--sort-semantically",
},
/// Whether to deduplicate `extern` blocks.
merge_extern_blocks: bool {
methods: {
/// Merge all extern blocks under the same module into a single one.
///
/// Extern blocks are not merged by default.
pub fn merge_extern_blocks(mut self, doit: bool) -> Self {
self.options.merge_extern_blocks = doit;
self
}
},
as_args: "--merge-extern-blocks",
},
/// Whether to wrap unsafe operations in unsafe blocks.
wrap_unsafe_ops: bool {
methods: {
/// Wrap all unsafe operations in unsafe blocks.
///
/// Unsafe operations are not wrapped by default.
pub fn wrap_unsafe_ops(mut self, doit: bool) -> Self {
self.options.wrap_unsafe_ops = doit;
self
}
},
as_args: "--wrap-unsafe-ops",
},
/// Patterns for functions whose ABI should be overriden.
abi_overrides: HashMap<Abi, RegexSet> {
methods: {
regex_option! {
/// Override the ABI of a given function.
pub fn override_abi<T: Into<String>>(mut self, abi: Abi, arg: T) -> Self {
self.options
.abi_overrides
.entry(abi)
.or_default()
.insert(arg.into());
self
}
}
},
as_args: |overrides, args| {
for (abi, set) in overrides {
for item in set.get_items() {
args.push("--override-abi".to_owned());
args.push(format!("{}={}", item, abi));
}
}
},
},
/// Whether to generate wrappers for `static` functions.
wrap_static_fns: bool {
methods: {
#[cfg(feature = "experimental")]
/// Set whether to generate wrappers for `static`` functions.
///
/// Passing `true` to this method will generate a C source file with non-`static`
/// functions that call the `static` functions found in the input headers and can be
/// called from Rust once the source file is compiled.
///
/// The path of this source file can be set using the [`Builder::wrap_static_fns_path`]
/// method.
pub fn wrap_static_fns(mut self, doit: bool) -> Self {
self.options.wrap_static_fns = doit;
self
}
},
as_args: "--wrap-static-fns",
},
/// The suffix to be added to the function wrappers for `static` functions.
wrap_static_fns_suffix: Option<String> {
methods: {
#[cfg(feature = "experimental")]
/// Set the suffix added to the wrappers for `static` functions.
///
/// This option only comes into effect if `true` is passed to the
/// [`Builder::wrap_static_fns`] method.
///
/// The default suffix is `__extern`.
pub fn wrap_static_fns_suffix<T: AsRef<str>>(mut self, suffix: T) -> Self {
self.options.wrap_static_fns_suffix = Some(suffix.as_ref().to_owned());
self
}
},
as_args: "--wrap-static-fns-suffix",
},
/// The path of the file where the wrappers for `static` functions will be emitted.
wrap_static_fns_path: Option<PathBuf> {
methods: {
#[cfg(feature = "experimental")]
/// Set the path for the source code file that would be created if any wrapper
/// functions must be generated due to the presence of `static` functions.
///
/// `bindgen` will automatically add the right extension to the header and source code
/// files.
///
/// This option only comes into effect if `true` is passed to the
/// [`Builder::wrap_static_fns`] method.
///
/// The default path is `temp_dir/bindgen/extern`, where `temp_dir` is the path
/// returned by [`std::env::temp_dir`] .
pub fn wrap_static_fns_path<T: AsRef<Path>>(mut self, path: T) -> Self {
self.options.wrap_static_fns_path = Some(path.as_ref().to_owned());
self
}
},
as_args: "--wrap-static-fns-path",
},
/// Default visibility of fields.
default_visibility: FieldVisibilityKind {
methods: {
/// Set the default visibility of fields, including bitfields and accessor methods for
/// bitfields.
///
/// This option only comes into effect if the [`Builder::respect_cxx_access_specs`]
/// option is disabled.
pub fn default_visibility(
mut self,
visibility: FieldVisibilityKind,
) -> Self {
self.options.default_visibility = visibility;
self
}
},
as_args: |visibility, args| {
if *visibility != Default::default() {
args.push("--default-visibility".to_owned());
args.push(visibility.to_string());
}
},
},
/// Whether to emit diagnostics or not.
emit_diagnostics: bool {
methods: {
#[cfg(feature = "experimental")]
/// Emit diagnostics.
///
/// These diagnostics are emitted to `stderr` if you are using `bindgen-cli` or printed
/// using `cargo:warning=` if you are using `bindgen` as a `build-dependency`.
///
/// Diagnostics are not emitted by default.
///
/// The layout and contents of these diagnostic messages are not covered by versioning
/// and can change without notice.
pub fn emit_diagnostics(mut self) -> Self {
self.options.emit_diagnostics = true;
self
}
},
as_args: "--emit-diagnostics",
}
}
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