blob: 10bd0091dda00129e9ebc76632046500506cf808 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/**
* 所有声明的类的列表
*/
package minijava.symboltable;
import java.util.Vector;
import minijava.typecheck.PrintError;
public class MClasses extends MType {
public Vector<MClass> mj_classes = new Vector<MClass>(); // 用于存放类
MClass findClassByName(String c_name) {
for (int i=0; i<mj_classes.size(); i++) {
if (mj_classes.elementAt(i).getName().equals(c_name)) {
return mj_classes.elementAt(i);
}
}
return null;
}
// 在表中插入类
public String InsertClass(MClass v_class) {
String class_name = v_class.getName();
if (Repeated(class_name)) // 如已经定义过该类，返回错误信息
return "Class double declaration " + "\"" + class_name + "\"";
mj_classes.addElement(v_class);
return null;
}
// 判定是否定义同名的类
public boolean Repeated(String class_name) {
int sz = mj_classes.size();
for (int i = 0; i < sz; i++) {
String c_name = ((MClass) mj_classes.elementAt(i)).getName();
if (c_name.equals(class_name))
return true;
}
return false;
}
public void buildClassRelation() {
// 通过extend_class_name确定extend_class, 并查找循环继承
for (int i=0; i<mj_classes.size(); i++) {
MClass m_class = mj_classes.elementAt(i);
String ext_name = m_class.extend_class_name;
if (ext_name!=null) {
m_class.extend_class = findClassByName(ext_name);
}
}
int tag = 1; // 扫描循环继承的标记
for (int i=0; i<mj_classes.size(); i++) {
MClass m_class = mj_classes.elementAt(i);
if (m_class.extend_tag==0) {
m_class.extend_tag = tag;
while (m_class.extend_class!=null) {
m_class = m_class.extend_class;
if (m_class.extend_tag==tag) { // 循环继承
PrintError.print(m_class.line, m_class.column,
"Circular extend in class"+m_class.name);
break; // error
} else if (m_class.extend_tag==0) {
m_class.extend_tag = tag;
} else {
break; // no error
}
}
tag++;
}
}
}
public boolean checkAllVars() {
boolean result = true;
for (int i=0; i<mj_classes.size(); i++) {
result &= mj_classes.elementAt(i).classVarCheck();
}
return result;
}
public boolean checkAllFuncs() {
boolean result = true;
for (int i=0; i<mj_classes.size(); i++) {
result &= mj_classes.elementAt(i).classFuncCheck();
}
return result;
}
public void checkAllStatements() {
for (int i=0; i<mj_classes.size(); i++) {
mj_classes.elementAt(i).classStatementCheck();
}
}
// 调试输出: 打印所有的类的信息
public void printClasses(int spaces) {
for (int i=0; i<mj_classes.size(); i++) {
mj_classes.elementAt(i).printClass(spaces);
}
}
}
|
