Trait extendr_api::prelude::ScalarOperand

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pub trait ScalarOperand: 'static + Clone { }
Expand description

Elements that can be used as direct operands in arithmetic with arrays.

For example, f64 is a ScalarOperand which means that for an array a, arithmetic like a + 1.0, and, a * 2., and a += 3. are allowed.

In the description below, let A be an array or array view, let B be an array with owned data, and let C be an array with mutable data.

ScalarOperand determines for which scalars K operations &A @ K, and B @ K, and C @= K are defined, as right hand side operands, for applicable arithmetic operators (denoted @).

Left hand side scalar operands are not related to this trait (they need one impl per concrete scalar type); but they are still implemented for the same types, allowing operations K @ &A, and K @ B for primitive numeric types K.

This trait does not limit which elements can be stored in an array in general. Non-ScalarOperand types can still participate in arithmetic as array elements in in array-array operations.

Object Safety§

This trait is not object safe.

Implementations on Foreign Types§

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impl ScalarOperand for bool

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impl ScalarOperand for f32

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impl ScalarOperand for f64

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impl ScalarOperand for i8

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impl ScalarOperand for i16

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impl ScalarOperand for i32

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impl ScalarOperand for i64

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impl ScalarOperand for i128

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impl ScalarOperand for isize

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impl ScalarOperand for u8

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impl ScalarOperand for u16

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impl ScalarOperand for u32

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impl ScalarOperand for u64

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impl ScalarOperand for u128

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impl ScalarOperand for usize

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impl ScalarOperand for Complex<f32>

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impl ScalarOperand for Complex<f64>

Implementors§