1 files changed, 65 insertions, 0 deletions
diff --git a/third_party/rust/jsparagus-scope/src/data.rs b/third_party/rust/jsparagus-scope/src/data.rs
new file mode 100644
index 0000000000..1baeffe097
--- /dev/null
+++ b/third_party/rust/jsparagus-scope/src/data.rs
@@ -0,0 +1,65 @@
+//! Data generated by scope analysis, and consumed only by emitter
+
+use std::collections::HashMap;
+use stencil::script::ScriptStencilIndex;
+
+/// Data associated to a function.
+#[derive(Debug)]
+pub struct FunctionProperty {
+    is_annex_b: bool,
+}
+
+impl FunctionProperty {
+    fn is_annex_b_default() -> bool {
+        false
+    }
+
+    pub fn new() -> Self {
+        Self {
+            is_annex_b: Self::is_annex_b_default(),
+        }
+    }
+
+    pub fn mark_annex_b(&mut self) {
+        self.is_annex_b = true;
+    }
+
+    pub fn is_annex_b(&self) -> bool {
+        self.is_annex_b
+    }
+}
+
+/// Map from function to associated data.
+#[derive(Debug)]
+pub struct FunctionDeclarationPropertyMap {
+    /// This map is populated lazily, only for functions with non-default
+    /// property.
+    props: HashMap<ScriptStencilIndex, FunctionProperty>,
+}
+
+impl FunctionDeclarationPropertyMap {
+    pub fn new() -> Self {
+        Self {
+            props: HashMap::new(),
+        }
+    }
+
+    pub fn mark_annex_b(&mut self, index: ScriptStencilIndex) {
+        if !self.props.contains_key(&index) {
+            self.props.insert(index, FunctionProperty::new());
+        }
+
+        self.props
+            .get_mut(&index)
+            .expect("Should exist")
+            .mark_annex_b();
+    }
+
+    pub fn is_annex_b(&self, index: ScriptStencilIndex) -> bool {
+        if !self.props.contains_key(&index) {
+            return FunctionProperty::is_annex_b_default();
+        }
+
+        self.props.get(&index).expect("Should exist").is_annex_b()
+    }
+}