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use std::fmt::Debug; use nu_source::{DebugDocBuilder, HasSpan, PrettyDebugWithSource, Span}; pub trait SignatureRegistry: Debug { fn has(&self, name: &str) -> bool; fn get(&self, name: &str) -> Option<nu_protocol::Signature>; fn clone_box(&self) -> Box<dyn SignatureRegistry>; } impl SignatureRegistry for Box<dyn SignatureRegistry> { fn has(&self, name: &str) -> bool { (&**self).has(name) } fn get(&self, name: &str) -> Option<nu_protocol::Signature> { (&**self).get(name) } fn clone_box(&self) -> Box<dyn SignatureRegistry> { (&**self).clone_box() } } #[derive(Debug, Clone)] pub struct Signature { pub(crate) unspanned: nu_protocol::Signature, span: Span, } impl Signature { pub fn new(unspanned: nu_protocol::Signature, span: impl Into<Span>) -> Signature { Signature { unspanned, span: span.into(), } } } impl HasSpan for Signature { fn span(&self) -> Span { self.span } } impl PrettyDebugWithSource for Signature { fn pretty_debug(&self, source: &str) -> DebugDocBuilder { self.unspanned.pretty_debug(source) } }