refactor: reduce coupling

evaluator/nixjit_eval/src/value/string.rs

@@ -0,0 +1,27 @@
+// TODO: Contextful String
+
+pub struct StringContext {
+    context: Vec<()>,
+}
+
+impl StringContext {
+    pub fn new() -> StringContext {
+        StringContext {
+            context: Vec::new(),
+        }
+    }
+}
+
+pub struct ContextfulString {
+    string: String,
+    context: StringContext,
+}
+
+impl ContextfulString {
+    pub fn new(string: String) -> ContextfulString {
+        ContextfulString {
+            string,
+            context: StringContext::new(),
+        }
+    }
+}