From bfbd3dc9654ba3cef961d585ee555ec733852ddb Mon Sep 17 00:00:00 2001
From: Ryan Burns <rtburns@protonmail.com>
Date: Sun, 17 Oct 2021 19:49:26 -0700
Subject: [PATCH] RFC 110: Add "inherit-as-list" language construct

Initial MVP implementation for [RFC 110](https://github.com/NixOS/rfcs/pull/110)
---
 src/libexpr/parser.y | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y
index 8a0a79c964fd..3b238a0c98e0 100644
--- a/src/libexpr/parser.y
+++ b/src/libexpr/parser.y
@@ -343,6 +343,15 @@ expr_function
         });
       $$ = new ExprLet($2, $4);
     }
+  | INHERIT '(' expr ')' '[' attrs ']'
+    { auto ret = new ExprList;
+      ret->elems.reserve($6->size());
+      /* !!! Should ensure sharing of the expression in $3. */
+      for (auto & i : *$6) {
+          ret->elems.push_back(new ExprSelect(makeCurPos(@6, data), $3, i.symbol));
+      }
+      $$ = ret;
+    }
   | expr_if
   ;