Trait Trace

pub trait Trace: Sized {
    // Provided methods
    fn trace(&self, vis: &mut Visitor) { ... }
    extern "C" fn trace_(vis: *mut Visitor, this: *const u8) { ... }
    fn get_trace_descriptor(this: *const u8) -> TraceDescriptor { ... }
}

Expand description

Trait specifying how the garbage collector processes an object of type T.

Provided Methods§

fn trace(&self, vis: &mut Visitor)

Function invoking the tracing for an object of type T.

visitor: The visitor to dispatch to.

Examples found in repository ?

examples/simple.rs (line 15)

13    fn trace(&self, vis: &mut Visitor) {
14        println!("Trace {:p} {:?}",self,self);
15        self.value.trace(vis);
16        self.next.trace(vis);
17    }

extern "C" fn trace_(vis: mut Visitor, this: const u8)

trace_ method is used for C FFI safety.

fn get_trace_descriptor(this: *const u8) -> TraceDescriptor

Returns trace descriptor for type that implements this trait. Not recommended to override it.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types§

impl TraceTrait for bool

impl TraceTrait for f32

impl TraceTrait for f64

impl TraceTrait for i8

impl TraceTrait for i16

impl TraceTrait for i32

impl TraceTrait for i64

impl TraceTrait for i128

impl TraceTrait for isize

impl TraceTrait for u8

impl TraceTrait for u16

impl TraceTrait for u32

impl TraceTrait for u64

impl TraceTrait for u128

impl TraceTrait for usize

impl TraceTrait for String

impl TraceTrait for File

impl TraceTrait for PathBuf

impl<K, V> TraceTrait for HashMap<K, V>
where K: TraceTrait, V: TraceTrait,

fn trace(&self, vis: &mut Visitor)

impl<T> TraceTrait for Option<T>
where T: TraceTrait,

fn trace(&self, vis: &mut Visitor)

impl<T> TraceTrait for Vec<T>
where T: TraceTrait,

fn trace(&self, vis: &mut Visitor)

impl<T, E> TraceTrait for Result<T, E>
where T: TraceTrait, E: TraceTrait,

fn trace(&self, vis: &mut Visitor)

Implementors§

impl TraceTrait for UntypedGcRef

impl TraceTrait for WeakSlot

impl<T> TraceTrait for GcRef<T>
where T: TraceTrait,

impl<T: GcCell + Trace> TraceTrait for GcPointer<T>

impl<T: GcCell> TraceTrait for WeakRef<T>