mirror of https://github.com/rust-lang/rust
39 lines
957 B
Rust
39 lines
957 B
Rust
#![feature(generic_const_exprs)]
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#![allow(incomplete_features)]
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trait TensorDimension {
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const DIM: usize;
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}
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trait TensorSize: TensorDimension {
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fn size(&self) -> [usize; Self::DIM];
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}
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trait Broadcastable: TensorSize + Sized {
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type Element;
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fn lazy_updim<const NEWDIM: usize>(&self, size: [usize; NEWDIM]) {}
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}
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struct BMap<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> {
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reference: &'a T,
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closure: F,
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}
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impl<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> TensorDimension
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for BMap<'a, R, T, F, DIM>
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{
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const DIM: usize = DIM;
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}
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impl<'a, R, T: Broadcastable, F: Fn(T::Element) -> R, const DIM: usize> TensorSize
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for BMap<'a, R, T, F, DIM>
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{
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fn size(&self) -> [usize; DIM] {
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//~^ ERROR: method not compatible with trait [E0308]
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self.reference.size()
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//~^ ERROR: unconstrained generic constant
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//~| ERROR: mismatched types
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}
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}
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fn main() {}
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