Struct bindgen::Builder[][src]

pub struct Builder { /* fields omitted */ }

Configure and generate Rust bindings for a C/C++ header.

This is the main entry point to the library.

use bindgen::builder;

// Configure and generate bindings.
let bindings = builder().header("path/to/input/header")
    .allowlist_type("SomeCoolClass")
    .allowlist_function("do_some_cool_thing")
    .generate()?;

// Write the generated bindings to an output file.
bindings.write_to_file("path/to/output.rs")?;

Enums

Bindgen can map C/C++ enums into Rust in different ways. The way bindgen maps enums depends on the pattern passed to several methods:

  1. constified_enum_module()
  2. bitfield_enum()
  3. newtype_enum()
  4. rustified_enum()

For each C enum, bindgen tries to match the pattern in the following order:

  1. Constified enum module
  2. Bitfield enum
  3. Newtype enum
  4. Rustified enum

If none of the above patterns match, then bindgen will generate a set of Rust constants.

Clang arguments

Extra arguments can be passed to with clang:

  1. clang_arg(): takes a single argument
  2. clang_args(): takes an iterator of arguments
  3. BINDGEN_EXTRA_CLANG_ARGS environment variable: whitespace separate environment variable of arguments

Clang arguments specific to your crate should be added via the clang_arg()/clang_args() methods.

End-users of the crate may need to set the BINDGEN_EXTRA_CLANG_ARGS environment variable to add additional arguments. For example, to build against a different sysroot a user could set BINDGEN_EXTRA_CLANG_ARGS to --sysroot=/path/to/sysroot.

Implementations

impl Builder[src]

pub fn command_line_flags(&self) -> Vec<String>

Notable traits for Vec<u8, A>

impl<A> Write for Vec<u8, A> where
    A: Allocator
[src]

Generates the command line flags use for creating Builder.

pub fn header<T: Into<String>>(self, header: T) -> Builder[src]

Add an input C/C++ header to generate bindings for.

This can be used to generate bindings to a single header:

let bindings = bindgen::Builder::default()
    .header("input.h")
    .generate()
    .unwrap();

Or you can invoke it multiple times to generate bindings to multiple headers:

let bindings = bindgen::Builder::default()
    .header("first.h")
    .header("second.h")
    .header("third.h")
    .generate()
    .unwrap();

pub fn header_contents(self, name: &str, contents: &str) -> Builder[src]

Add contents as an input C/C++ header named name.

The file name will be added to the clang arguments.

pub fn rust_target(self, rust_target: RustTarget) -> Self[src]

Specify the rust target

The default is the latest stable Rust version

pub fn disable_untagged_union(self) -> Self[src]

Disable support for native Rust unions, if supported.

pub fn disable_header_comment(self) -> Self[src]

Disable insertion of bindgen’s version identifier into generated bindings.

pub fn emit_ir_graphviz<T: Into<String>>(self, path: T) -> Builder[src]

Set the output graphviz file.

pub fn generate_comments(self, doit: bool) -> Self[src]

Whether the generated bindings should contain documentation comments (docstrings) or not. This is set to true by default.

Note that clang by default excludes comments from system headers, pass -fretain-comments-from-system-headers as clang_arg to include them. It can also be told to process all comments (not just documentation ones) using the -fparse-all-comments flag. See slides on clang comment parsing for background and examples.

pub fn allowlist_recursively(self, doit: bool) -> Self[src]

Whether to allowlist recursively or not. Defaults to true.

Given that we have explicitly allowlisted the “initiate_dance_party” function in this C header:

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 struct that it transitively references. By configuring with allowlist_recursively(false), bindgen will not emit bindings for anything except the explicitly allowlisted items, and there would be no emitted struct definition for MoonBoots. 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 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 whitelist_recursively(self, doit: bool) -> Self[src]

👎 Deprecated:

Use allowlist_recursively instead

Deprecated alias for allowlist_recursively.

pub fn objc_extern_crate(self, doit: bool) -> Self[src]

Generate #[macro_use] extern crate objc; instead of use objc; in the prologue of the files generated from objective-c files

pub fn generate_block(self, doit: bool) -> Self[src]

Generate proper block signatures instead of void pointers.

pub fn block_extern_crate(self, doit: bool) -> Self[src]

Generate #[macro_use] extern crate block; instead of use block; in the prologue of the files generated from apple block files

pub fn trust_clang_mangling(self, doit: bool) -> Self[src]

Whether to use the clang-provided name mangling. This is true by default and probably needed for C++ features.

However, some old libclang versions seem to return incorrect results in some cases for non-mangled functions, see 1, so we allow disabling it.

pub fn hide_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

Use blocklist_type instead

Hide the given type from the generated bindings. Regular expressions are supported.

pub fn blacklist_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

Use blocklist_type instead

Hide the given type from the generated bindings. Regular expressions are supported.

pub fn blocklist_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

Hide the given type from the generated bindings. Regular expressions are supported.

To blocklist types prefixed with “mylib” use "mylib_.*". For more complicated expressions check regex docs

pub fn blacklist_function<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

Use blocklist_function instead

Hide the given function from the generated bindings. Regular expressions are supported.

pub fn blocklist_function<T: AsRef<str>>(self, arg: T) -> Builder[src]

Hide the given function from the generated bindings. Regular expressions are supported.

To blocklist functions prefixed with “mylib” use "mylib_.*". For more complicated expressions check regex docs

pub fn blacklist_item<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

Use blocklist_item instead

Hide the given item from the generated bindings, regardless of whether it’s a type, function, module, etc. Regular expressions are supported.

pub fn blocklist_item<T: AsRef<str>>(self, arg: T) -> Builder[src]

Hide the given item from the generated bindings, regardless of whether it’s a type, function, module, etc. Regular expressions are supported.

To blocklist items prefixed with “mylib” use "mylib_.*". For more complicated expressions check regex docs

pub fn opaque_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

Treat the given type as opaque in the generated bindings. Regular expressions are supported.

To change types prefixed with “mylib” into opaque, use "mylib_.*". For more complicated expressions check regex docs

pub fn whitelisted_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

use allowlist_type instead

Allowlist the given type so that it (and all types that it transitively refers to) appears in the generated bindings. Regular expressions are supported.

pub fn whitelist_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

use allowlist_type instead

Allowlist the given type so that it (and all types that it transitively refers to) appears in the generated bindings. Regular expressions are supported.

pub fn allowlist_type<T: AsRef<str>>(self, arg: T) -> Builder[src]

Allowlist the given type so that it (and all types that it transitively refers to) appears in the generated bindings. Regular expressions are supported.

To allowlist types prefixed with “mylib” use "mylib_.*". For more complicated expressions check regex docs

pub fn allowlist_function<T: AsRef<str>>(self, arg: T) -> Builder[src]

Allowlist the given function so that it (and all types that it transitively refers to) appears in the generated bindings. Regular expressions are supported.

To allowlist functions prefixed with “mylib” use "mylib_.*". For more complicated expressions check regex docs

pub fn whitelist_function<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

use allowlist_function instead

Allowlist the given function.

Deprecated: use allowlist_function instead.

pub fn whitelisted_function<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

use allowlist_function instead

Allowlist the given function.

Deprecated: use allowlist_function instead.

pub fn allowlist_var<T: AsRef<str>>(self, arg: T) -> Builder[src]

Allowlist the given variable so that it (and all types that it transitively refers to) appears in the generated bindings. Regular expressions are supported.

To allowlist variables prefixed with “mylib” use "mylib_.*". For more complicated expressions check regex docs

pub fn whitelist_var<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

use allowlist_var instead

Deprecated: use allowlist_var instead.

pub fn whitelisted_var<T: AsRef<str>>(self, arg: T) -> Builder[src]

👎 Deprecated:

use allowlist_var instead

Allowlist the given variable.

Deprecated: use allowlist_var instead.

pub fn default_enum_style(self, arg: EnumVariation) -> Builder[src]

Set the default style of code to generate for enums

pub fn bitfield_enum<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given enum (or set of enums, if using a pattern) as being bitfield-like. Regular expressions are supported.

This makes bindgen generate a type that isn’t a rust enum. Regular expressions are supported.

This is similar to the newtype enum style, but with the bitwise operators implemented.

pub fn newtype_enum<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given enum (or set of enums, if using a pattern) as a newtype. Regular expressions are supported.

This makes bindgen generate a type that isn’t a Rust enum. Regular expressions are supported.

pub fn rustified_enum<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given enum (or set of enums, if using a pattern) as a Rust enum.

This makes bindgen generate enums instead of constants. Regular expressions are supported.

Use this with caution, creating this in unsafe code (including FFI) with an invalid value will invoke undefined behaviour. You may want to use the newtype enum style instead.

pub fn rustified_non_exhaustive_enum<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given enum (or set of enums, if using a pattern) as a Rust enum with the #[non_exhaustive] attribute.

This makes bindgen generate enums instead of constants. Regular expressions are supported.

Use this with caution, creating this in unsafe code (including FFI) with an invalid value will invoke undefined behaviour. You may want to use the newtype enum style instead.

pub fn constified_enum<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given enum (or set of enums, if using a pattern) as a set of constants that are not to be put into a module.

pub fn constified_enum_module<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given enum (or set of enums, if using a pattern) as a set of constants that should be put into a module.

This makes bindgen generate modules containing constants instead of just constants. Regular expressions are supported.

pub fn default_macro_constant_type(self, arg: MacroTypeVariation) -> Builder[src]

Set the default type for macro constants

pub fn default_alias_style(self, arg: AliasVariation) -> Builder[src]

Set the default style of code to generate for typedefs

pub fn type_alias<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given typedef alias (or set of aliases, if using a pattern) to use regular Rust type aliasing.

This is the default behavior and should be used if default_alias_style was set to NewType or NewTypeDeref and you want to override it for a set of typedefs.

pub fn new_type_alias<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given typedef alias (or set of aliases, if using a pattern) to be generated as a new type by having the aliased type be wrapped in a #[repr(transparent)] struct.

Used to enforce stricter type checking.

pub fn new_type_alias_deref<T: AsRef<str>>(self, arg: T) -> Builder[src]

Mark the given typedef alias (or set of aliases, if using a pattern) to be generated as a new type by having the aliased type be wrapped in a #[repr(transparent)] struct and also have an automatically generated impl’s of Deref and DerefMut to their aliased type.

pub fn raw_line<T: Into<String>>(self, arg: T) -> Self[src]

Add a string to prepend to the generated bindings. The string is passed through without any modification.

pub fn module_raw_line<T, U>(self, mod_: T, line: U) -> Self where
    T: Into<String>,
    U: Into<String>, 
[src]

Add a given line to the beginning of module mod.

pub fn module_raw_lines<T, I>(self, mod_: T, lines: I) -> Self where
    T: Into<String>,
    I: IntoIterator,
    I::Item: Into<String>, 
[src]

Add a given set of lines to the beginning of module mod.

pub fn clang_arg<T: Into<String>>(self, arg: T) -> Builder[src]

Add an argument to be passed straight through to clang.

pub fn clang_args<I>(self, iter: I) -> Builder where
    I: IntoIterator,
    I::Item: AsRef<str>, 
[src]

Add arguments to be passed straight through to clang.

pub fn emit_builtins(self) -> Builder[src]

Emit bindings for builtin definitions (for example __builtin_va_list) in the generated Rust.

pub fn no_convert_floats(self) -> Self[src]

Avoid converting floats to f32/f64 by default.

pub fn layout_tests(self, doit: bool) -> Self[src]

Set whether layout tests should be generated.

pub fn impl_debug(self, doit: bool) -> Self[src]

Set whether Debug should be implemented, if it can not be derived automatically.

pub fn impl_partialeq(self, doit: bool) -> Self[src]

Set whether PartialEq should be implemented, if it can not be derived automatically.

pub fn derive_copy(self, doit: bool) -> Self[src]

Set whether Copy should be derived by default.

pub fn derive_debug(self, doit: bool) -> Self[src]

Set whether Debug should be derived by default.

pub fn derive_default(self, doit: bool) -> Self[src]

Set whether Default should be derived by default.

pub fn derive_hash(self, doit: bool) -> Self[src]

Set whether Hash should be derived by default.

pub fn derive_partialord(self, doit: bool) -> Self[src]

Set whether PartialOrd should be derived by default. If we don’t compute partialord, we also cannot compute ord. Set the derive_ord to false when doit is false.

pub fn derive_ord(self, doit: bool) -> Self[src]

Set whether Ord should be derived by default. We can’t compute Ord without computing PartialOrd, so we set the same option to derive_partialord.

pub fn derive_partialeq(self, doit: bool) -> Self[src]

Set whether PartialEq should be derived by default.

If we don’t derive PartialEq, we also cannot derive Eq, so deriving Eq is also disabled when doit is false.

pub fn derive_eq(self, doit: bool) -> Self[src]

Set whether Eq should be derived by default.

We can’t derive Eq without also deriving PartialEq, so we also enable deriving PartialEq when doit is true.

pub fn time_phases(self, doit: bool) -> Self[src]

Set whether or not to time bindgen phases, and print information to stderr.

pub fn emit_clang_ast(self) -> Builder[src]

Emit Clang AST.

pub fn emit_ir(self) -> Builder[src]

Emit IR.

pub fn enable_cxx_namespaces(self) -> Builder[src]

Enable C++ namespaces.

pub fn enable_function_attribute_detection(self) -> Self[src]

Enable detecting must_use attributes on C functions.

This is quite slow in some cases (see #1465), so it’s disabled by default.

Note that for this to do something meaningful for now at least, the rust target version has to have support for #[must_use].

pub fn disable_name_namespacing(self) -> Builder[src]

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 intentionally does not change the names used for allowlisting and blocklisting, which should still be mangled with the namespaces.

Note, also, that this option may cause bindgen to generate duplicate names.

pub fn disable_nested_struct_naming(self) -> Builder[src]

Disable nested struct naming.

The following structs have different names for C and C++. In case of C they are visible as foo and bar. In case of C++ they are visible as foo and foo::bar.

struct foo {
    struct bar {
    } b;
};

Bindgen wants to avoid duplicate names by default so it follows C++ naming and it generates foo/foo_bar instead of just foo/bar.

This method disables this behavior and it is indented to be used only for headers that were written for C.

pub fn conservative_inline_namespaces(self) -> Builder[src]

Treat inline namespaces conservatively.

This is tricky, because in C++ is technically legal to override an item defined in an inline namespace:

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 don’t 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 bindgen usage is a bit more difficult, because you cannot reference, e.g., std::string (you’d need to use the proper inline namespace).

We could complicate a lot of the logic to detect name collisions, and if not detected generate a pub use inline_ns::* or something like that.

That’s probably something we can do if we see this option is needed in a lot of cases, to improve it’s usability, but my guess is that this is not going to be too useful.

pub fn generate_inline_functions(self, doit: bool) -> Self[src]

Whether inline functions should be generated or not.

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.

pub fn ignore_functions(self) -> Builder[src]

Ignore functions.

pub fn ignore_methods(self) -> Builder[src]

Ignore methods.

pub fn unstable_rust(self, doit: bool) -> Self[src]

👎 Deprecated:

please use rust_target instead

Avoid generating any unstable Rust, such as Rust unions, in the generated bindings.

pub fn use_core(self) -> Builder[src]

Use core instead of libstd in the generated bindings.

pub fn ctypes_prefix<T: Into<String>>(self, prefix: T) -> Builder[src]

Use the given prefix for the raw types instead of ::std::os::raw.

pub fn anon_fields_prefix<T: Into<String>>(self, prefix: T) -> Builder[src]

Use the given prefix for the anon fields.

pub fn parse_callbacks(self, cb: Box<dyn ParseCallbacks>) -> Self[src]

Allows configuring types in different situations, see the ParseCallbacks documentation.

pub fn with_codegen_config(self, config: CodegenConfig) -> Self[src]

Choose what to generate using a CodegenConfig.

pub fn detect_include_paths(self, doit: bool) -> Self[src]

Whether to detect include paths using clang_sys.

pub fn fit_macro_constants(self, doit: bool) -> Self[src]

Whether to try to fit macro constants to types smaller than u32/i32

pub fn prepend_enum_name(self, doit: bool) -> Self[src]

Prepend the enum name to constant or newtype variants.

pub fn size_t_is_usize(self, is: bool) -> Self[src]

Set whether size_t should be translated to usize automatically.

pub fn rustfmt_bindings(self, doit: bool) -> Self[src]

Set whether rustfmt should format the generated bindings.

pub fn record_matches(self, doit: bool) -> Self[src]

Set whether we should record matched items in our regex sets.

pub fn rustfmt_configuration_file(self, path: Option<PathBuf>) -> Self[src]

Set the absolute path to the rustfmt configuration file, if None, the standard rustfmt options are used.

pub fn with_rustfmt<P: Into<PathBuf>>(self, path: P) -> Self[src]

Sets an explicit path to rustfmt, to be used when rustfmt is enabled.

pub fn generate(self) -> Result<Bindings, ()>[src]

Generate the Rust bindings using the options built up thus far.

pub fn dump_preprocessed_input(&self) -> Result<()>[src]

Preprocess and dump the input header files to disk.

This is useful when debugging bindgen, using C-Reduce, or when filing issues. The resulting file will be named something like __bindgen.i or __bindgen.ii

pub fn no_partialeq<T: Into<String>>(self, arg: T) -> Builder[src]

Don’t derive PartialEq for a given type. Regular expressions are supported.

pub fn no_copy<T: Into<String>>(self, arg: T) -> Self[src]

Don’t derive Copy for a given type. Regular expressions are supported.

pub fn no_debug<T: Into<String>>(self, arg: T) -> Self[src]

Don’t derive Debug for a given type. Regular expressions are supported.

pub fn no_default<T: Into<String>>(self, arg: T) -> Self[src]

Don’t derive/impl Default for a given type. Regular expressions are supported.

pub fn no_hash<T: Into<String>>(self, arg: T) -> Builder[src]

Don’t derive Hash for a given type. Regular expressions are supported.

pub fn array_pointers_in_arguments(self, doit: bool) -> Self[src]

Set whether arr[size] should be treated as *mut T or *mut [T; size] (same for mut)

pub fn wasm_import_module_name<T: Into<String>>(self, import_name: T) -> Self[src]

Set the wasm import module name

pub fn dynamic_library_name<T: Into<String>>(
    self,
    dynamic_library_name: T
) -> Self
[src]

Specify the dynamic library name if we are generating bindings for a shared library.

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.

pub fn respect_cxx_access_specs(self, doit: bool) -> Self[src]

Generate bindings as pub only if the bound item is publically accessible by C++.

pub fn translate_enum_integer_types(self, doit: bool) -> Self[src]

Always translate enum integer types to native Rust integer types.

This will result in enums having types such as u32 and i16 instead of c_uint and c_short. Types for Rustified enums are always translated.

Trait Implementations

impl Debug for Builder[src]

impl Default for Builder[src]

Auto Trait Implementations

impl !RefUnwindSafe for Builder

impl !Send for Builder

impl !Sync for Builder

impl Unpin for Builder

impl UnwindSafe for Builder

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.