started work on the symbol table, preparing for variables

1 files changed, 48 insertions, 0 deletions

diff --git a/code/simpleSableCCCalulator/sableCCCalculator/SymbolTable.java b/code/simpleSableCCCalulator/sableCCCalculator/SymbolTable.java
new file mode 100644
index 0000000..435e48d
--- /dev/null
+++ b/code/simpleSableCCCalulator/sableCCCalculator/SymbolTable.java
@@ -0,0 +1,48 @@
+package sableCCCalculator;
+import java.util.HashMap;
+import sableCCCalculator.types.*;
+
+public class SymbolTable {
+
+    public interface SymbolTableIndex {}
+
+    public abstract class Name implements SymbolTableIndex {
+        protected String name;
+
+        String getName() {
+            return this.name;
+        }
+    }
+
+    public class Constant implements SymbolTableIndex {
+        int index;
+
+        public Constant(int index) {
+            this.index = index;
+        }
+    }
+
+    public class Variable extends Name {
+        public Variable(String name) {
+            this.name = name;
+        }
+    }
+
+    private HashMap<SymbolTableIndex, Type> theSymbolTable = new HashMap<>();
+
+    public SymbolTableIndex addConstant(Type item) {
+        SymbolTableIndex index = new Constant(item.hashCode());
+        theSymbolTable.put(index, item);
+        return index;
+    }
+
+    public SymbolTableIndex addVariable(Type item, String name) {
+        SymbolTableIndex index = new Variable(name);
+        theSymbolTable.put(index, item);
+        return index;
+    }
+
+    public Type get(SymbolTableIndex index) {
+        return theSymbolTable.get(index);
+    }
+}