Struct libslide::parser::errors::IllegalPattern

pub(crate) struct IllegalPattern;

Patterns are illegal in a "regular" slide program; i.e. a program including a standard expression.

In most cases, this error is fired because you intended to run an expression pattern through slide, or wrote a variable in the form of a pattern.

Because patterns are abstractions over expressions, they cannot be evaluated in the way an expression can without first being filled in by an expression. As an analogy, saying you have "eaten groceries" does not provide concrete information about what you have eaten without first defining what the groceries are.

Trait Implementations

impl DiagnosticRecord for IllegalPattern

const CODE: &'static str

Diagnostic code.

const EXPLANATION: &'static str

Detailed diagnostic explanation.