Doccomment expression stuff

crates/nu-protocol/src/ast/expr.rs

@@ -7,6 +7,7 @@ use super::{
 };
 use crate::{ast::ImportPattern, engine::EngineState, BlockId, OutDest, Signature, Span, VarId};
 
+/// An [`Expression`] AST node
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum Expr {
     Bool(bool),
@@ -119,6 +120,7 @@ impl Expr {
     }
 }
 
+/// Expressions permitted inside a record expression/literal
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum RecordItem {
     /// A key: val mapping
@@ -127,6 +129,7 @@ pub enum RecordItem {
     Spread(Span, Expression),
 }
 
+/// Expressions permitted inside a list expression/literal
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum ListItem {
     /// A normal expression

crates/nu-protocol/src/ast/expression.rs

@@ -6,6 +6,7 @@ use crate::{
 use serde::{Deserialize, Serialize};
 use std::sync::Arc;
 
+/// Wrapper around [`Expr`]
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct Expression {
     pub expr: Expr,