# Description
This PR adds two new `ParseError` and `ShellError` cases for type errors
relating to operators.
- `OperatorUnsupportedType` is used when a type is not supported by an
operator in any way, shape, or form. E.g., `+` does not support `bool`.
- `OperatorIncompatibleTypes` is used when a operator is used with types
it supports, but the combination of types provided cannot be used
together. E.g., `filesize + duration` is not a valid combination.
The other preexisting error cases related to operators have been removed
and replaced with the new ones above. Namely:
- `ShellError::OperatorMismatch`
- `ShellError::UnsupportedOperator`
- `ParseError::UnsupportedOperationLHS`
- `ParseError::UnsupportedOperationRHS`
- `ParseError::UnsupportedOperationTernary`
# User-Facing Changes
- `help operators` now lists the precedence of `not` as 55 instead of 0
(above the other boolean operators). Fixes#13675.
- `math median` and `math mode` now ignore NaN values so that `[NaN NaN]
| math median` and `[NaN NaN] | math mode` no longer trigger a type
error. Instead, it's now an empty input error. Fixing this in earnest
can be left for a future PR.
- Comparisons with `nan` now return false instead of causing an error.
E.g., `1 == nan` is now `false`.
- All the operator type errors have been standardized and reworked. In
particular, they can now have a help message, which is currently used
for types errors relating to `++`.
```nu
[1] ++ 2
```
```
Error: nu::parser::operator_unsupported_type
× The '++' operator does not work on values of type 'int'.
╭─[entry #1:1:5]
1 │ [1] ++ 2
· ─┬ ┬
· │ ╰── int
· ╰── does not support 'int'
╰────
help: if you meant to append a value to a list or a record to a table, use the `append` command or wrap the value in a list. For example: `$list ++ $value` should be
`$list ++ [$value]` or `$list | append $value`.
```
# Description
This PR changes the range contains logic to take the step into account.
```nushell
# before
2 in 1..3.. # true
# now
2 in 1..3.. # false
```
---
I encountered another issue while adding tests. Due to floating point
precision, `2.1 in 1..1.1..3` will return `false`. The floating point
error is even bigger than `f64::EPSILON` (`0.09999999999999876` vs
`2.220446049250313e-16`). This issue disappears with bigger numbers.
I tried a different algorithm (checking if the estimated number of steps
is close enough to any integer) but the results are still pretty bad:
```rust
let n_steps = (value - self.start) / self.step; // 14.999999999999988
(n_steps - n_steps.round()).abs() < f64::EPSILON // returns false
```
Maybe it can be shipped like this, the REPL already has floating point
errors (`1.1 - 1` returns `0.10000000000000009`). Or maybe there's a way
to fix this that I didn't think of. I'm open to ideas! But in any case
performing this kind of checks on a range of floats seems more niche
than doing it on a range of ints.
# User-Facing Changes
Code that depended on this behavior to check if a number is between
`start` and `end` will potentially return a different value.
# Tests + Formatting
# After Submitting
This PR should close#7147
# Description
Merged src/tests into /tests to produce a single binary.
# User-Facing Changes
No user facing changes
# Tests + Formatting
Moved tests. Tollkit check pr pass.
# After Submitting
---------
Co-authored-by: Ian Manske <ian.manske@pm.me>
