From 70877428a8d9f17834dee72f03ef80ce5c206e68 Mon Sep 17 00:00:00 2001
From: Jonas Schievink <jonasschievink@gmail.com>
Date: Fri, 11 Dec 2020 14:57:50 +0100
Subject: Pass crate environment to proc macros

---
 crates/base_db/src/input.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'crates/base_db')

diff --git a/crates/base_db/src/input.rs b/crates/base_db/src/input.rs
index a693e7f80..9567bcc42 100644
--- a/crates/base_db/src/input.rs
+++ b/crates/base_db/src/input.rs
@@ -151,8 +151,12 @@ pub enum ProcMacroKind {
 }
 
 pub trait ProcMacroExpander: fmt::Debug + Send + Sync + RefUnwindSafe {
-    fn expand(&self, subtree: &Subtree, attrs: Option<&Subtree>)
-        -> Result<Subtree, ExpansionError>;
+    fn expand(
+        &self,
+        subtree: &Subtree,
+        attrs: Option<&Subtree>,
+        env: &Env,
+    ) -> Result<Subtree, ExpansionError>;
 }
 
 #[derive(Debug, Clone)]
@@ -418,6 +422,10 @@ impl Env {
     pub fn get(&self, env: &str) -> Option<String> {
         self.entries.get(env).cloned()
     }
+
+    pub fn iter(&self) -> impl Iterator<Item = (&str, &str)> {
+        self.entries.iter().map(|(k, v)| (k.as_str(), v.as_str()))
+    }
 }
 
 #[derive(Debug)]
-- 
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