private List <symbol_reserved> reservedSym = new List <symbol_reserved>(); //保留字表
/// <summary>
/// 构造函数
/// </summary>
public SymbolAnalysis(PL0Compiler C)
{
ch = (int)' ';
LSymLine = 1;
lineNum = 1;
compiler = C;
sourceCode = new StreamReader(compiler.source);
//添加保留词
reservedSym.Add(new symbol_reserved(symbol.beginSym, "begin"));
reservedSym.Add(new symbol_reserved(symbol.endSym, "end"));
reservedSym.Add(new symbol_reserved(symbol.constSym, "const"));
reservedSym.Add(new symbol_reserved(symbol.varSym, "var"));
reservedSym.Add(new symbol_reserved(symbol.procedureSym, "procedure"));
reservedSym.Add(new symbol_reserved(symbol.oddSym, "odd"));
reservedSym.Add(new symbol_reserved(symbol.ifSym, "if"));
reservedSym.Add(new symbol_reserved(symbol.thenSym, "then"));
reservedSym.Add(new symbol_reserved(symbol.elseSym, "else"));
reservedSym.Add(new symbol_reserved(symbol.callSym, "call"));
reservedSym.Add(new symbol_reserved(symbol.whileSym, "while"));
reservedSym.Add(new symbol_reserved(symbol.doSym, "do"));
reservedSym.Add(new symbol_reserved(symbol.repeatSym, "repeat"));
reservedSym.Add(new symbol_reserved(symbol.untilSym, "until"));
reservedSym.Add(new symbol_reserved(symbol.readSym, "read"));
reservedSym.Add(new symbol_reserved(symbol.writeSym, "write"));
}
/// <summary>
/// 构造函数
/// </summary>
public SymbolTable(PL0Compiler C)
{
this.lev = 0;
this.tx[0] = 0;
SymTabItem nul = new SymTabItem();
nul.name = "";
SymTable.Add(nul);
this.compiler = C;
}
private SymbolSet factorbegs = new SymbolSet(); //因子开始符号集
/// <summary>
/// 构造函数
/// </summary>
/// <param name="C"></param>
public GrammarAndSemanticAna(PL0Compiler C)
{
compiler = C;
//添加声明部分开始符号
declarebegs.Add(symbol.constSym);
declarebegs.Add(symbol.varSym);
declarebegs.Add(symbol.procedureSym);
//添加语句开始符号
statementbegs.Add(symbol.beginSym);
statementbegs.Add(symbol.callSym);
statementbegs.Add(symbol.whileSym);
statementbegs.Add(symbol.ifSym);
statementbegs.Add(symbol.repeatSym);
//添加因子开始符号
factorbegs.Add(symbol.ident);
factorbegs.Add(symbol.number);
factorbegs.Add(symbol.LParenthesis);
}
/// <summary>
/// 构造函数
/// </summary>
public ErrorHandle(PL0Compiler C)
{
compiler = C;
//添加错误
errors.Add(1, "常数说明中的\"=\"写成\":=\"");
errors.Add(2, "常数说明中的\"=\"后应是数字");
errors.Add(3, "常数说明中标识符后应是\"=\"");
errors.Add(4, "const, var, procedure 后应是标识符");
errors.Add(5, "漏掉了\',\' 或\';\'");
errors.Add(6, "过程说明后的符号不正确(应是语句开始符,或过程定义符");
errors.Add(7, "应是语句开始符");
errors.Add(8, "程序体内的语句部分的后跟符不正确");
errors.Add(9, "程序结尾丢了句号\'.\'");
errors.Add(10, "语句之间漏了\';\'");
errors.Add(11, "标识符未说明");
errors.Add(12, "赋值语句中, 赋值号左部标识符属性应是变量");
errors.Add(13, "赋值语句左部标识符后应是赋值号\':=\'");
errors.Add(14, "call 后应为标识符");
errors.Add(15, "call 后标识符属性应为过程");
errors.Add(16, "条件语句中丢了\'then\'");
errors.Add(17, "丢了\'end\' 或\';\'");
errors.Add(18, "while 型循环语句中丢了\'do\'");
errors.Add(19, "语句后的符号不正确");
errors.Add(20, "应为关系运算符");
errors.Add(21, "表达式内标识符属性不能是过程");
errors.Add(22, "表达式中漏掉右括号\')\'");
errors.Add(23, "因子后的非法符号");
errors.Add(24, "表达式的开始符不能是此符号");
errors.Add(25, "repeat 型循环语句中没有until");
errors.Add(26, "程序层次结构超过限制");
errors.Add(30, "数位太长");
errors.Add(31, "数越界");
errors.Add(32, "read语句括号中的标识符不是变量");
errors.Add(33, "语句漏掉左括号\'(\'");
errors.Add(34, "语句漏掉右括号\')\'");
errors.Add(35, "read语句缺乏变量");
errors.Add(36, "程序体之外出现字符");
}
