## report_unstable

# Function report_unstable

Source

    pub fn report_unstable(
        sess: &Session,
        feature: Symbol,
        reason: Option<Symbol>,
        issue: Option<NonZero<u32>>,
        suggestion: Option<(Span, String, String, Applicability)>,
        is_soft: bool,
        span: Span,
        soft_handler: impl FnOnce(&'static Lint, Span, String),
        kind: UnstableKind,
    )