public override void ExitRelativeExpression(WeatherRuleParser.RelativeExpressionContext context)
{
/*
DAYBEFORETODAY:'昨天';
TODAY:'今天';
TOMORROW:'明天';
DAYAFTERTOMORROW:'后天';
*/
DateTime whichDay = DateTime.Now;
var tokenString = context.GetText();
if (tokenString == "昨天")
whichDay = whichDay.AddDays(-1);
else if (tokenString == "今天")
;
else if (tokenString == "明天")
whichDay = whichDay.AddDays(1);
else if (tokenString == "后天")
whichDay = whichDay.AddDays(1);
else
throw new NotSupportedException();
this.result.FromDate = whichDay;
this.result.ToDate = whichDay;
}
public override void ExitFixDayExpression(WeatherRuleParser.FixDayExpressionContext context)
{
var monthString=context.monthly().number().GetText();
var dayString = context.date().number().GetText();
int month = Utils.Parse2Int(monthString);
int day = Utils.Parse2Int(dayString);
DateTime date = new DateTime(DateTime.Now.Year, month, day);
this.result.FromDate = date;
this.result.ToDate = date;
}
public static ParseResult Parse(string sentence)
{
Antlr4.Runtime.AntlrInputStream input = new Antlr4.Runtime.AntlrInputStream(sentence);
WeatherRuleLexer lexer = new WeatherRuleLexer(input);
Antlr4.Runtime.UnbufferedTokenStream tokens = new Antlr4.Runtime.UnbufferedTokenStream(lexer);
WeatherRuleParser parser = new WeatherRuleParser(tokens);
parser.RemoveErrorListeners();
var tree = parser.compileUnit();
ParseTreeWalker walker = new ParseTreeWalker();
WeatherListener lsn = new WeatherListener();
walker.Walk(lsn, tree);
return lsn.Result;
}
public override void ExitPositiveExpression(WeatherRuleParser.PositiveExpressionContext context)
{
// '这' number? '天'
this.result.FromDate = DateTime.Now;
var numToken = context.number();
if (numToken == null)
{
this.result.ToDate = DateTime.Now;
return;
}
var numberString = numToken.GetText();
int day = Utils.Parse2Int(numberString);
this.result.ToDate = DateTime.Now.AddDays(day);
}
public override void ExitCity(WeatherRuleParser.CityContext context)
{
//在哪里
result.Where = context.GetText();
}