tenferro-einsum 0.3.0

Subscripts, contraction planning, concrete/traced/eager einsum APIs, extension runtime, and AD rule for tenferro.
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use super::Subscripts;
use crate::Error;

#[test]
fn parse_rejects_parenthesized_order_without_discarding_it() {
    let err = Subscripts::parse("ij,(jk,kl)->il").unwrap_err();

    assert!(matches!(
        err,
        Error::InvalidSubscripts { message }
            if message.contains("parentheses")
                && message.contains("NestedEinsum::parse")
    ));
}

#[test]
fn parse_rejects_ellipsis_with_specific_error() {
    let err = Subscripts::parse("...ij,...jk->...ik").unwrap_err();

    assert!(matches!(
        err,
        Error::InvalidSubscripts { message }
            if message.contains("ellipsis")
                && message.contains("not supported")
    ));
}