Add lookup_by_name to symbol table

schala-lang/src/eval.rs

@@ -290,7 +290,7 @@ impl<'a> State<'a> {
     //in the values table
 
     let symbol_table = self.symbol_table_handle.borrow();
-    let value = symbol_table.values.get(&name);
+    let value = symbol_table.lookup_by_name(&name);
     Ok(match value {
       Some(Symbol { name, spec }) => match spec {
         SymbolSpec::DataConstructor { type_name, type_args, .. } => {

schala-lang/src/reduced_ast.rs

@@ -117,7 +117,7 @@ impl Expression {
       BinExp(binop, lhs, rhs) => binop.reduce(symbol_table, lhs, rhs),
       PrefixExp(op, arg) => op.reduce(symbol_table, arg),
       Value(name) => {
-        match symbol_table.values.get(name) {
+        match symbol_table.lookup_by_name(name) {
           Some(Symbol { spec: SymbolSpec::DataConstructor { index, type_args, type_name}, .. }) => Expr::NewConstructor {
             type_name: type_name.clone(),
             name: name.clone(),

schala-lang/src/symbol_table.rs

@@ -17,6 +17,10 @@ impl SymbolTable {
   pub fn new() -> SymbolTable {
     SymbolTable { values: HashMap::new() }
   }
+
+  pub fn lookup_by_name(&self, name: &Rc<String>) -> Option<&Symbol> {
+    self.values.get(name)
+  }
 }
 
 #[derive(Debug)]