From 2a86e4db0bb3894d1cc3b94e1a1af31a6cd87b80 Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Tue, 14 Mar 2023 22:33:22 +0100
Subject: Reference supplements

---
 src/eval/library.rs | 6 +++---
 src/eval/mod.rs     | 4 +++-
 2 files changed, 6 insertions(+), 4 deletions(-)

(limited to 'src/eval')

diff --git a/src/eval/library.rs b/src/eval/library.rs
index 14f02d98..d3f7547d 100644
--- a/src/eval/library.rs
+++ b/src/eval/library.rs
@@ -59,8 +59,8 @@ pub struct LangItems {
     pub raw_languages: fn() -> Vec<(&'static str, Vec<&'static str>)>,
     /// A hyperlink: `https://typst.org`.
     pub link: fn(url: EcoString) -> Content,
-    /// A reference: `@target`.
-    pub ref_: fn(target: Label) -> Content,
+    /// A reference: `@target`, `@target[..]`.
+    pub reference: fn(target: Label, supplement: Option<Content>) -> Content,
     /// A section heading: `= Introduction`.
     pub heading: fn(level: NonZeroUsize, body: Content) -> Content,
     /// An item in a bullet list: `- ...`.
@@ -106,7 +106,7 @@ impl Hash for LangItems {
         self.emph.hash(state);
         self.raw.hash(state);
         self.link.hash(state);
-        self.ref_.hash(state);
+        self.reference.hash(state);
         self.heading.hash(state);
         self.list_item.hash(state);
         self.enum_item.hash(state);
diff --git a/src/eval/mod.rs b/src/eval/mod.rs
index ae5f668a..127c930f 100644
--- a/src/eval/mod.rs
+++ b/src/eval/mod.rs
@@ -567,7 +567,9 @@ impl Eval for ast::Ref {
     type Output = Content;
 
     fn eval(&self, vm: &mut Vm) -> SourceResult<Self::Output> {
-        Ok((vm.items.ref_)(Label(self.get().into())))
+        let label = Label(self.target().into());
+        let supplement = self.supplement().map(|block| block.eval(vm)).transpose()?;
+        Ok((vm.items.reference)(label, supplement))
     }
 }
 
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