//该函数对每个符号串进行语法分析，生成最终的操作表
public static List <Operation> Grammar(List <SignTable> rawOperations)
{
List <Operation> result = new List <Operation>();
foreach (SignTable raw in rawOperations)
{
//遇到赋值语句，则要分析出：左值是？右值是？
if (raw[raw.size() - 1].id == "1")
{
int i = 0;
for (; i < raw.size(); i++)
{
if (raw[i].id == "=")
{
break;
}
}
if (i < raw.size())
{
//等号之前的变量标记为左值
for (int j = i - 1; j >= 0; j--)
{
if (raw[j].type == "id")
{
raw[j].type = "结果";
}
}
//等号之后的变量标记位右值
for (int j = i + 1; j < raw.size(); j++)
{
if (raw[j].type == "id")
{
raw[j].type = "args";
}
}
}
AssignOperation oper = new AssignOperation(raw);
result.Add(oper);
}
//遇到函数定义语句，要分析出，函数名是？，变量是？
else if (raw[raw.size() - 1].id == "2")
{
int i = 0;
for ( ; i < raw.size(); i++)
{
if (raw[i].type == "保留字")
{//标记上该id为函数名
raw[i + 1].type = "funcname";
}
else if (raw[i].id == "(")
{
break;
}
}
//把前括号到后括号的内容都标记为args
for (int j = i + 1; raw[j].id != ")"; j++)
{
raw[j].type = "args";
}
FunctionDefinationOpration oper = new FunctionDefinationOpration(raw);
result.Add(oper);
}
//遇到循环的语句，要分析出，循环判断条件是？判断左值是？右值是？
else
{
CirculateOperation oper = new CirculateOperation();
//分析括号之内的条件
bool isleft = true; //标记应当为左值，假如遇到不等号，切换为右值
for (int i = 2; raw[i].id != ")"; i++)
{
if (raw[i].type == "id")
{
if (isleft)
{
raw[i].type = "ConditionLeft";
oper.ConditionLeft = raw[i];
}
else
{
raw[i].type = "ConditionRight";
oper.ConditionRight = raw[i];
}
}
else if (raw[i].type == "op")
{
isleft = !isleft;
raw[i].type = raw[i].id;
oper.type = raw[i];
}
}
result.Add(oper);
}
}
return(result);
}
//测试用
public void test()
{
//测试print函数
//FunctionBuilder foobuilder = Lex.TotalFunctionList.getFunctionBuilderByName("print");
//SignTable s = new SignTable();
//Sign a1 = new Sign(new DadaInt("", "12456"), "args");
//Sign a2 = new Sign(new DadaInt("", "12456"), "args");
//Sign a3 = new Sign(new DadaInt("", "12456"), "args");
//s.Add(a1);
//s.Add(a1);
//s.Add(a1);
//Function f = foobuilder.build(s);
//f.run();
/*
* a=1;
* while(a<100){
* a=a+1:
* print(a);
* }
*
*/
//a=1;=====================================
SignTable st1 = new SignTable();
st1.Add(new Sign("a", "结果"));
st1.Add(new Sign(new DadaInt("", "1")));
AssignOperation ass = new AssignOperation(st1);
//while(a<100)
CirculateOperation cop = new CirculateOperation();
SignTable condition = new SignTable();
condition.Add(new Sign("a", "ConditionLeft"));
condition.Add(new Sign("", "<"));
condition.Add(new Sign(new DadaInt("", "1000"), "ConditionRight"));
cop.setCondition(condition);
//{
List <Operation> cb = new List <Operation>();
//a=a+1:
SignTable st2 = new SignTable();
st2.Add(new Sign("a", "结果"));
st2.Add(new Sign("a"));
st2.Add(new Sign("", "+"));
st2.Add(new Sign(new DadaInt("", "1")));
AssignOperation ass2 = new AssignOperation(st2);
//print(a);
FunctionBuilder print = Lex.TotalFunctionList.getFunctionBuilderByName("print");
SignTable st3 = new SignTable();
st3.Add(new Sign(print));
st3.Add(new Sign("a", "args"));
AssignOperation ass3 = new AssignOperation(st3);
//}
cb.Add(ass2);
cb.Add(ass3);
cop.setCirculateBody(cb);
//测试开始执行
ass.doSomethings(Lex.TotalSignList);
cop.doSomethings(Lex.TotalSignList);
}
