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pub enum SliceInfoElem {
    Slice {
        start: isize,
        end: Option<isize>,
        step: isize,
    },
    Index(isize),
    NewAxis,
}
Expand description

A slice (range with step), an index, or a new axis token.

See also the s![] macro for a convenient way to create a SliceInfo<[SliceInfoElem; n], Din, Dout>.

Examples

SliceInfoElem::Index(a) is the index a. It can also be created with SliceInfoElem::from(a). The Python equivalent is [a]. The macro equivalent is s![a].

SliceInfoElem::Slice { start: 0, end: None, step: 1 } is the full range of an axis. It can also be created with SliceInfoElem::from(..). The Python equivalent is [:]. The macro equivalent is s![..].

SliceInfoElem::Slice { start: a, end: Some(b), step: 2 } is every second element from a until b. It can also be created with SliceInfoElem::from(Slice::from(a..b).step_by(2)). The Python equivalent is [a:b:2]. The macro equivalent is s![a..b;2].

SliceInfoElem::Slice { start: a, end: None, step: -1 } is every element, from a until the end, in reverse order. It can also be created with SliceInfoElem::from(Slice::from(a..).step_by(-1)). The Python equivalent is [a::-1]. The macro equivalent is s![a..;-1].

SliceInfoElem::NewAxis is a new axis of length 1. It can also be created with SliceInfoElem::from(NewAxis). The Python equivalent is [np.newaxis]. The macro equivalent is s![NewAxis].

Variants

Slice

Fields

start: isize

start index; negative are counted from the back of the axis

end: Option<isize>

end index; negative are counted from the back of the axis; when not present the default is the full length of the axis.

step: isize

step size in elements; the default is 1, for every element.

A range with step size. end is an exclusive index. Negative start or end indexes are counted from the back of the axis. If end is None, the slice extends to the end of the axis.

Index(isize)

A single index.

NewAxis

A new axis of length 1.

Implementations

Returns true if self is a Slice value.

Returns true if self is an Index value.

Returns true if self is a NewAxis value.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

Uses borrowed data to replace owned data, usually by cloning. Read more

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.