/
lib.rs
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/
lib.rs
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//! The `neon` crate provides the entire [Neon](https://www.neon-bindings.com/) API.
extern crate neon_runtime;
extern crate cslice;
mod internal;
pub mod mem;
pub mod vm;
pub mod scope;
pub mod js;
#[doc(hidden)]
pub mod macro_internal;
/// Register the current crate as a Node module, providing startup
/// logic for initializing the module object at runtime.
///
/// Example:
///
/// ```rust,ignore
/// register_module!(m, {
/// try!(m.export("foo", foo));
/// try!(m.export("bar", bar));
/// try!(m.export("baz", baz));
/// Ok(())
/// });
/// ```
#[macro_export]
macro_rules! register_module {
($module:ident, $init:block) => {
// Mark this function as a global constructor (like C++).
#[allow(improper_ctypes)]
#[cfg_attr(target_os = "linux", link_section = ".ctors")]
#[cfg_attr(target_os = "macos", link_section = "__DATA,__mod_init_func")]
#[cfg_attr(target_os = "windows", link_section = ".CRT$XCU")]
pub static __LOAD_NEON_MODULE: extern "C" fn() = {
fn __init_neon_module(mut $module: $crate::vm::Module) -> $crate::vm::VmResult<()> $init
extern "C" fn __load_neon_module() {
// Put everything else in the ctor fn so the user fn can't see it.
#[repr(C)]
struct __NodeModule {
version: i32,
flags: u32,
dso_handle: *mut u8,
filename: *const u8,
register_func: Option<extern "C" fn(
$crate::mem::Handle<$crate::js::JsObject>, *mut u8, *mut u8)>,
context_register_func: Option<extern "C" fn(
$crate::mem::Handle<$crate::js::JsObject>, *mut u8, *mut u8, *mut u8)>,
modname: *const u8,
priv_data: *mut u8,
link: *mut __NodeModule
}
static mut __NODE_MODULE: __NodeModule = __NodeModule {
version: 0,
flags: 0,
dso_handle: 0 as *mut _,
filename: b"neon_source.rs\0" as *const u8,
register_func: Some(__register_neon_module),
context_register_func: None,
modname: b"neon_module\0" as *const u8,
priv_data: 0 as *mut _,
link: 0 as *mut _
};
extern "C" fn __register_neon_module(
m: $crate::mem::Handle<$crate::js::JsObject>, _: *mut u8, _: *mut u8) {
$crate::vm::Module::initialize(m, __init_neon_module);
}
extern "C" {
fn node_module_register(module: *mut __NodeModule);
}
// Suppress the default Rust panic hook, which prints diagnostics to stderr.
::std::panic::set_hook(::std::boxed::Box::new(|_| { }));
unsafe {
// Set the ABI version based on the NODE_MODULE_VERSION constant provided by the current node headers.
__NODE_MODULE.version = $crate::macro_internal::runtime::module::get_version();
node_module_register(&mut __NODE_MODULE);
}
}
__load_neon_module
};
}
}
#[doc(hidden)]
#[macro_export]
macro_rules! class_definition {
( $cls:ident ; $cname:ident ; $typ:ty ; $allocator:tt ; $call_ctor:tt ; $new_ctor:tt ; $mnames:tt ; $mdefs:tt ; init($call:pat) $body:block $($rest:tt)* ) => {
class_definition!($cls ;
$cname ;
$typ ;
{
fn _______allocator_rust_y_u_no_hygienic_items_______($call: $crate::vm::FunctionCall<$crate::js::JsUndefined>) -> $crate::vm::VmResult<$typ> {
$body
}
$crate::macro_internal::AllocateKernel::new(_______allocator_rust_y_u_no_hygienic_items_______)
} ;
$call_ctor ;
$new_ctor ;
$mnames ;
$mdefs ;
$($rest)*);
};
( $cls:ident ; $cname:ident ; $typ:ty ; $allocator:tt ; $call_ctor:tt ; $new_ctor:tt ; ($($mname:tt)*) ; ($($mdef:tt)*) ; method $name:ident($call:pat) $body:block $($rest:tt)* ) => {
class_definition!($cls ;
$cname ;
$typ ;
$allocator ;
$call_ctor ;
$new_ctor ;
($($mname)* $name) ;
($($mdef)* {
fn _______method_rust_y_u_no_hygienic_items_______($call: $crate::vm::FunctionCall<$cls>) -> $crate::vm::JsResult<$crate::js::JsValue> {
$body
}
$crate::macro_internal::MethodKernel::new(_______method_rust_y_u_no_hygienic_items_______)
}) ;
$($rest)*);
};
( $cls:ident ; $cname:ident ; $typ:ty ; $allocator:tt ; $call_ctor:tt ; $new_ctor:tt ; $mnames:tt ; $mdefs:tt ; constructor($call:pat) $body:block $($rest:tt)* ) => {
class_definition!($cls ;
$cname ;
$typ ;
$allocator ;
$call_ctor ;
({
fn _______constructor_rust_y_u_no_hygienic_items_______($call: $crate::vm::FunctionCall<$cls>) -> $crate::vm::VmResult<Option<$crate::mem::Handle<$crate::js::JsObject>>> {
$body
}
$crate::macro_internal::ConstructKernel::new(_______constructor_rust_y_u_no_hygienic_items_______)
}) ;
$mnames ;
$mdefs ;
$($rest)*);
};
( $cls:ident ; $cname:ident ; $typ:ty ; $allocator:tt ; $call_ctor:tt ; $new_ctor:tt ; $mnames:tt ; $mdefs:tt ; call($call:pat) $body:block $($rest:tt)* ) => {
class_definition!($cls ;
$cname ;
$typ ;
$allocator ;
({
fn _______call_rust_y_u_no_hygienic_items_______($call: $crate::vm::FunctionCall<$crate::js::JsValue>) -> $crate::vm::JsResult<$crate::js::JsValue> {
$body
}
$crate::macro_internal::ConstructorCallKernel::new(_______call_rust_y_u_no_hygienic_items_______)
}) ;
$new_ctor ;
$mnames ;
$mdefs ;
$($rest)*);
};
( $cls:ident ; $cname:ident ; $typ:ty ; $allocator:block ; ($($call_ctor:block)*) ; ($($new_ctor:block)*) ; ($($mname:ident)*) ; ($($mdef:block)*) ; $($rest:tt)* ) => {
impl $crate::js::class::Class for $cls {
type Internals = $typ;
fn setup<'a, T: $crate::scope::Scope<'a>>(_: &mut T) -> $crate::vm::VmResult<$crate::js::class::ClassDescriptor<'a, Self>> {
::std::result::Result::Ok(Self::describe(stringify!($cname), $allocator)
$(.construct($new_ctor))*
$(.call($call_ctor))*
$(.method(stringify!($mname), $mdef))*)
}
}
};
}
#[doc(hidden)]
#[macro_export]
macro_rules! impl_managed {
($cls:ident) => {
impl $crate::mem::Managed for $cls {
fn to_raw(self) -> $crate::macro_internal::runtime::raw::Local {
let $cls(raw) = self;
raw
}
fn from_raw(raw: $crate::macro_internal::runtime::raw::Local) -> Self {
$cls(raw)
}
}
}
}
/// Declare custom native JavaScript types with Rust implementations.
///
/// Example:
///
/// ```rust,ignore
/// pub struct Greeter {
/// greeting: String
/// }
///
/// declare_types! {
///
/// /// A class for generating greeting strings.
/// pub class JsGreeter for Greeter {
/// init(call) {
/// let scope = call.scope;
/// let greeting = try!(try!(call.arguments.require(scope, 0)).to_string(scope)).value();
/// Ok(Greeter {
/// greeting: greeting
/// })
/// }
///
/// method hello(call) {
/// let scope = call.scope;
/// let name = try!(try!(call.arguments.require(scope, 0)).to_string(scope)).value();
/// let msg = vm::lock(call.arguments.this(scope), |greeter| {
/// format!("{}, {}!", greeter.greeting, name)
/// });
/// Ok(try!(JsString::new_or_throw(scope, &msg[..])).upcast())
/// }
/// }
///
/// }
/// ```
#[macro_export]
macro_rules! declare_types {
{ $(#[$attr:meta])* pub class $cls:ident for $typ:ident { $($body:tt)* } $($rest:tt)* } => {
declare_types! { $(#[$attr])* pub class $cls as $typ for $typ { $($body)* } $($rest)* }
};
{ $(#[$attr:meta])* class $cls:ident for $typ:ident { $($body:tt)* } $($rest:tt)* } => {
declare_types! { $(#[$attr])* class $cls as $typ for $typ { $($body)* } $($rest)* }
};
{ $(#[$attr:meta])* pub class $cls:ident as $cname:ident for $typ:ty { $($body:tt)* } $($rest:tt)* } => {
#[derive(Copy, Clone)]
#[repr(C)]
$(#[$attr])*
pub struct $cls($crate::macro_internal::runtime::raw::Local);
impl_managed!($cls);
class_definition!($cls ; $cname ; $typ ; () ; () ; () ; () ; () ; $($body)*);
declare_types! { $($rest)* }
};
{ $(#[$attr:meta])* class $cls:ident as $cname:ident for $typ:ty { $($body:tt)* } $($rest:tt)* } => {
#[derive(Copy, Clone)]
#[repr(C)]
$(#[$attr])*
struct $cls($crate::macro_internal::runtime::raw::Local);
impl_managed!($cls);
class_definition!($cls ; $cname ; $typ ; () ; () ; () ; () ; () ; $($body)*);
declare_types! { $($rest)* }
};
{ } => { };
}