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Error on root of negative number

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Tiffany Bennett 2016-08-07 14:18:31 -04:00
parent 46510c0b0d
commit 4a182741e0
1 changed files with 3 additions and 0 deletions
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3
src/eval.rs
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@ -452,6 +452,9 @@ impl Context {
}
Ok(base.pow(fexp as i32))
} else if (1.0 / fexp).trunc() == 1.0 / fexp {
if base.0 < Mpq::zero() {
return Err(format!("Root of a negative number is imaginary, which is not yet implemented: {}^{}", self.show(&base), fexp))
}
base.root((1.0 / fexp) as i32).ok_or(format!("Unit roots must result in integer dimensions"))
} else {
Err(format!("Exponent not integer"))