diff --git a/semantic/src/lib.rs b/semantic/src/lib.rs
index b4ef974..1e8d15e 100644
--- a/semantic/src/lib.rs
+++ b/semantic/src/lib.rs
@@ -1,3 +1,2 @@
+pub mod scope;
 pub mod top_level;
-
-pub struct Scope {}
diff --git a/semantic/src/scope.rs b/semantic/src/scope.rs
new file mode 100644
index 0000000..ea4398f
--- /dev/null
+++ b/semantic/src/scope.rs
@@ -0,0 +1,21 @@
+use std::{
+    collections::HashMap,
+    sync::{Arc, Mutex},
+};
+
+use crate::top_level;
+
+pub enum Symbol {
+    Function(top_level::FunctionSymbol),
+    TypeSymbol(top_level::TypeSymbol),
+    StructSymbol(top_level::StructSymbol),
+}
+
+pub struct Scope {
+    pub parent: Option<Arc<Scope>>,
+    pub variables: Mutex<HashMap<String, Symbol>>,
+}
+
+impl Scope {
+    pub fn from_top_level() {}
+}
diff --git a/semantic/src/top_level.rs b/semantic/src/top_level.rs
index 5de1c84..904ea45 100644
--- a/semantic/src/top_level.rs
+++ b/semantic/src/top_level.rs
@@ -1,18 +1,20 @@
 use std::collections::HashMap;
 
 pub struct TypeSymbol {
-    export: bool,
-    name: String,
+    pub export: bool,
+    pub name: String,
 }
 
 pub struct FunctionSymbol {
-    export: bool,
-    name: String,
-    params: HashMap<String, TypeSymbol>,
+    pub export: bool,
+    pub name: String,
+    pub params: HashMap<String, TypeSymbol>,
 }
 
 pub struct StructSymbol {
-    export: bool,
-    name: String,
-    fields: HashMap<String, TypeSymbol>,
+    pub export: bool,
+    pub name: String,
+    pub fields: HashMap<String, TypeSymbol>,
+    pub methods: HashMap<String, FunctionSymbol>,
 }
+