Symbol notation

2 files changed, 37 insertions, 0 deletions

diff --git a/library/src/text/mod.rs b/library/src/text/mod.rs
index 47aaba36..5466637e 100644
--- a/library/src/text/mod.rs
+++ b/library/src/text/mod.rs
@@ -6,6 +6,7 @@ mod quotes;
 mod raw;
 mod shaping;
 mod shift;
+mod symbol;
 
 pub use self::deco::*;
 pub use self::misc::*;
@@ -13,6 +14,7 @@ pub use self::quotes::*;
 pub use self::raw::*;
 pub use self::shaping::*;
 pub use self::shift::*;
+pub use self::symbol::*;
 
 use std::borrow::Cow;
 
diff --git a/library/src/text/symbol.rs b/library/src/text/symbol.rs
new file mode 100644
index 00000000..cc12afb9
--- /dev/null
+++ b/library/src/text/symbol.rs
@@ -0,0 +1,35 @@
+use crate::prelude::*;
+use crate::text::TextNode;
+
+/// A symbol identified by symmie notation.
+#[derive(Debug, Hash)]
+pub struct SymbolNode(pub EcoString);
+
+#[node(Show)]
+impl SymbolNode {
+    fn construct(_: &Vm, args: &mut Args) -> SourceResult<Content> {
+        Ok(Self(args.expect("notation")?).pack())
+    }
+
+    fn field(&self, name: &str) -> Option<Value> {
+        match name {
+            "notation" => Some(Value::Str(self.0.clone().into())),
+            _ => None,
+        }
+    }
+}
+
+impl Show for SymbolNode {
+    fn show(&self, _: &mut Vt, this: &Content, _: StyleChain) -> SourceResult<Content> {
+        match symmie::get(&self.0) {
+            Some(c) => Ok(TextNode::packed(c)),
+            None => {
+                if let Some(span) = this.span() {
+                    bail!(span, "unknown symbol");
+                }
+
+                Ok(Content::empty())
+            }
+        }
+    }
+}