tract-core 0.3.2

Tiny, no-nonsense, self contained, TensorFlow and ONNX inference
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43

use crate::internal::*;

#[derive(Debug, Clone, Default)]
pub struct Identity;

impl Op for Identity {
    fn name(&self) -> Cow<str> {
        "Identity".into()
    }

    fn declutter(
        &self,
        model: &TypedModel,
        node: &TypedNode,
    ) -> TractResult<Option<TypedModelPatch>> {
        let mut patch = TypedModelPatch::default();
        let tap = patch.tap_model(model, node.inputs[0])?;
        patch.shunt_outside(OutletId::new(node.id, 0), tap)?;
        Ok(Some(patch))
    }
}

impl StatelessOp for Identity {
    /// Evaluates the operation given the input tensors.
    fn eval(&self, inputs: TVec<Arc<Tensor>>) -> TractResult<TVec<Arc<Tensor>>> {
        Ok(inputs)
    }
}

impl InferenceRulesOp for Identity {
    fn rules<'r, 'p: 'r, 's: 'r>(
        &'s self,
        s: &mut Solver<'r>,
        inputs: &'p [TensorProxy],
        outputs: &'p [TensorProxy],
    ) -> InferenceResult {
        check_input_arity(&inputs, 1)?;
        check_output_arity(&outputs, 1)?;
        s.equals(&inputs[0].datum_type, &outputs[0].datum_type)?;
        s.equals(&inputs[0].shape, &outputs[0].shape)?;
        Ok(())
    }
}