fix(overload): add type FuncTableType to solve the type of Ident

src/decaf/symbol/FunctionTable.java

@@ -3,6 +3,7 @@ package decaf.symbol;
 import java.util.*;
 
 import decaf.scope.ClassScope;
+import decaf.type.FuncTableType;
 import decaf.type.FuncType;
 
 public class FunctionTable extends Symbol {
@@ -32,8 +33,8 @@ public class FunctionTable extends Symbol {
 	}
 
 	@Override
-	public FuncType getType() {
-		return null;
+	public FuncTableType getType() {
+		return new FuncTableType(name);
 	}
 
 	@Override

src/decaf/type/FuncTableType.java

+package decaf.type;
+
+public class FuncTableType extends Type {
+	String name;
+
+	public FuncTableType (String name)
+	{
+		this.name = name;
+	}
+
+	public boolean isFuncTableType() {
+		return true;
+	}
+
+	public boolean compatible(Type type)
+	{
+		return equal (type);
+	}
+
+	public boolean equal(Type type)
+	{
+		return equals (type);
+	}
+
+	public String toString()
+	{
+		return name + "(...)";
+	}
+}

src/decaf/type/Type.java

@@ -17,6 +17,10 @@ public abstract class Type {
 		return false;
 	}
 
+	public boolean isFuncTableType() {
+		return false;
+	}
+
 	public abstract boolean compatible(Type type);
 
 	public abstract boolean equal(Type type);