1 files changed, 41 insertions, 0 deletions
diff --git a/third_party/rust/jsparagus-emitter/src/block_emitter.rs b/third_party/rust/jsparagus-emitter/src/block_emitter.rs
new file mode 100644
index 0000000000..b6400a5832
--- /dev/null
+++ b/third_party/rust/jsparagus-emitter/src/block_emitter.rs
@@ -0,0 +1,41 @@
+use crate::ast_emitter::AstEmitter;
+use crate::emitter::EmitError;
+use stencil::scope::ScopeIndex;
+
+pub struct BlockEmitter<'a, FuncT, FuncF, StmtT, StmtF>
+where
+    FuncF: Fn(&mut AstEmitter, &FuncT) -> Result<(), EmitError>,
+    StmtF: Fn(&mut AstEmitter, &StmtT) -> Result<(), EmitError>,
+{
+    pub scope_index: ScopeIndex,
+    pub functions: std::slice::Iter<'a, FuncT>,
+    pub function: FuncF,
+    pub statements: std::slice::Iter<'a, StmtT>,
+    pub statement: StmtF,
+}
+
+impl<'a, FuncT, FuncF, StmtT, StmtF> BlockEmitter<'a, FuncT, FuncF, StmtT, StmtF>
+where
+    FuncF: Fn(&mut AstEmitter, &FuncT) -> Result<(), EmitError>,
+    StmtF: Fn(&mut AstEmitter, &StmtT) -> Result<(), EmitError>,
+{
+    pub fn emit(self, emitter: &mut AstEmitter) -> Result<(), EmitError> {
+        emitter.scope_stack.enter_lexical(
+            &mut emitter.emit,
+            &mut emitter.compilation_info.scope_data_map,
+            self.scope_index,
+        );
+
+        for fun in self.functions {
+            (self.function)(emitter, fun)?;
+        }
+
+        for statement in self.statements {
+            (self.statement)(emitter, statement)?;
+        }
+
+        emitter.scope_stack.leave_lexical(&mut emitter.emit);
+
+        Ok(())
+    }
+}