Enum rustc_hir_typeck::fn_ctxt::arg_matrix::Error

pub(crate) enum Error<'tcx> {
    Invalid(ProvidedIdx, ExpectedIdx, Compatibility<'tcx>),
    Missing(ExpectedIdx),
    Extra(ProvidedIdx),
    Swap(ProvidedIdx, ProvidedIdx, ExpectedIdx, ExpectedIdx),
    Permutation(Vec<(ExpectedIdx, ProvidedIdx)>),
}

Similar to Issue, but contains some extra information

Variants

Invalid(ProvidedIdx, ExpectedIdx, Compatibility<'tcx>)

The provided argument is the invalid type for the expected input

Missing(ExpectedIdx)

There is a missing input

Extra(ProvidedIdx)

There’s a superfluous argument

Swap(ProvidedIdx, ProvidedIdx, ExpectedIdx, ExpectedIdx)

Two arguments should be swapped

Permutation(Vec<(ExpectedIdx, ProvidedIdx)>)

Several arguments should be reordered

Trait Implementations

impl<'tcx> Debug for Error<'tcx>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size:40 bytes

Size for each variant:

• Invalid: 40 bytes
• Missing: 4 bytes
• Extra: 4 bytes
• Swap: 16 bytes
• Permutation: 24 bytes