Enum VjpRefusal 

pub enum VjpRefusal {
    NoGradient {
        op: &'static str,
        why: &'static str,
    },
    NotDerived {
        op: &'static str,
    },
    NotDifferentiated {
        tensor: String,
        op: &'static str,
    },
    Shapeless {
        tensor: String,
    },
    Unrecognized {
        statements: Vec<(usize, String)>,
    },
    UnknownOutput {
        tensor: String,
    },
    Parse(String),
}

Why a stage has no backward rule.

Variants

NoGradient

The op is piecewise constant in its inputs: its gradient is zero almost everywhere and undefined at the jumps, so no training signal flows through it.

Fields

op: &'static str

why: &'static str

NotDerived

The op’s rule is not written yet.

Fields

op: &'static str

NotDifferentiated

The loss depends on tensor through op, whose rule does not differentiate that operand (a table of rotation angles, an integer index): asking for its gradient is refused rather than answered with zero.

Fields

tensor: String

op: &'static str

Shapeless

A tensor the backward pass needs has no shape the front end recorded.

Fields

tensor: String

Unrecognized

The forward program does not lift whole, so its backward cannot be derived from it.

Fields

statements: Vec<(usize, String)>

UnknownOutput

The output the loss is taken over is not a tensor any stage computes or the program declares.

Fields

tensor: String

Parse(String)

The parser refused the program.

Trait Implementations

impl Clone for VjpRefusal

fn clone(&self) -> VjpRefusal

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VjpRefusal

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for VjpRefusal

fn eq(&self, other: &VjpRefusal) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for VjpRefusal

impl StructuralPartialEq for VjpRefusal