# FilterValidationError

- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** enum
- **Source:** https://github.com/libtmux/libtmux-swift/blob/254f8b2be7eb60cacc3ffcb3ea8e456784f582df/Sources/LibTmux/FilterExpr.swift#L50
- **Page:** https://libtmux.org/en/swift/latest/reference/filtervalidationerror/

Why a decoded filter cannot be evaluated safely.

## Members

- `!=(_:_:)` (function): Returns a Boolean value indicating whether two values are not equal.
- `localizedDescription` (property): Retrieve the localized description for this error.
- `unknownField(_:)` (constant)
- `incompatibleOperation(field:type:operation:)` (constant)