3 files changed, 31 insertions, 4 deletions
diff --git a/src/minijava/symboltable/MClass.java b/src/minijava/symboltable/MClass.java
index a5b90f2..4e64f54 100644
--- a/src/minijava/symboltable/MClass.java
+++ b/src/minijava/symboltable/MClass.java
@@ -5,18 +5,16 @@ package minijava.symboltable;
 
 import minijava.typecheck.PrintError;
 
-public class MClass extends MType {
+public class MClass extends MLocalVarType {
 	public MClasses all_classes; // 所有类的列表
 	public boolean isDeclared = false; // 是否已声明，用于检查符号表
 	public String extend_class_name = null; // 所继承的类
-	public MVarList vars;
 	public MMethodList methods;
 
 	public MClass(String v_name, MClasses all, int m_line, int m_column) {
 		super(m_line, m_column);
 		name = v_name;
 		all_classes = all;
-		vars = new MVarList();
 		methods = new MMethodList();
 	}
 	
diff --git a/src/minijava/symboltable/MLocalVarType.java b/src/minijava/symboltable/MLocalVarType.java
new file mode 100644
index 0000000..9824ae4
--- /dev/null
+++ b/src/minijava/symboltable/MLocalVarType.java
@@ -0,0 +1,13 @@
+/* 可定义局部变量的抽象类 */
+
+package minijava.symboltable;
+
+public abstract class MLocalVarType extends MType {
+	public MVarList vars;
+	
+	public MLocalVarType(int m_line, int m_column) {
+		super(m_line, m_column);
+		vars = new MVarList();
+	}
+	public abstract String insertVar(MVariable var);
+}
diff --git a/src/minijava/symboltable/MMethod.java b/src/minijava/symboltable/MMethod.java
index 30159cf..f4b58fa 100644
--- a/src/minijava/symboltable/MMethod.java
+++ b/src/minijava/symboltable/MMethod.java
@@ -1,11 +1,27 @@
 package minijava.symboltable;
 
-public class MMethod extends MType {
+public class MMethod extends MLocalVarType {
 	MVarList params;
 	String ret_type_name;
+	MClass method_class;
+	MVarList paramList;
 	
 	public MMethod(String m_name, int m_type, int m_column) {
 		super(m_type, m_column);
 		this.name = m_name;
+		ret_type_name = null;
+		paramList = new MVarList();
+	}
+	
+	public String insertVar(MVariable var) {
+		String var_name = var.getName();
+		if (paramList.findVar(var_name)!=-1) {
+			return "Variable \'" + var_name + "\' already in param list!";
+		}
+		if (vars.findVar(var_name)!=-1) {
+			return "Variable double declaration " + "\"" + var_name + "\"";	
+		}
+		vars.insertVar(var);
+		return null;
 	}
 }