protected override LexerSetting OnLexerSetting(LexerSetting basesetting)
{
LexerSetting setting = LexerSetting.Default;
setting.IgnoreCase = true; //词法解析中忽略大小写
setting.InlineCommentsStartSign = "/*"; //行内注释起始符
setting.InlineCommentsEndSign = "*/"; //行内注释终止符
setting.OutlineCommentsSign = "--"; //行外注释
setting.LiteralFirstChars = new char[] { '@' }; //使用@开头的为模板参数
setting.CustomOperators = new string[] { "not", "and", "or", "in", "like", "is" };
setting.Keywords = new string[] { "var", "declare", "if", "else", "switch", "default", "true", "false", "null",
"select", "from", "where", "insert", "into", "values", "update", "set", "delete",
"join", "on", "left", "right", "full", "inner", "having", "asc", "desc", "as", "group", "order", "by", "union", "all", "limit", "offset" };
return(setting);
}
public ExpressionParser(string sou)
{
LexerSetting setting = LexerSetting.Default;
setting.IgnoreCase = true; //词法解析中忽略大小写
setting.InlineCommentsStartSign = "/*"; //行内注释起始符
setting.InlineCommentsEndSign = "*/"; //行内注释终止符
setting.OutlineCommentsSign = "//"; //行外注释
setting.LiteralFirstChars = new char[] { '@' }; //使@开头的标识符可以识别
setting.CustomOperators = new string[] { "not", "and", "or", "in", "like", "is" };
setting.Keywords = new string[] { "true", "fasle" };
Lexer lexer = new Lexer(sou, OnLexerSetting(setting));
SetTokens(lexer.Reslove());
}
/// <summary>
/// 在派生类中重写为当前使用的词法解析器提供配置
/// </summary>
/// <param name="basesetting"></param>
/// <returns></returns>
protected virtual LexerSetting OnLexerSetting(LexerSetting basesetting)
{
return(basesetting);
}
