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newlang5Main.java
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newlang5Main.java
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import newlang3.*;
import newlang4.*;
import newlang5.*;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.IOException;
public class newlang5Main {
public static void main(String[] args) throws Exception {
InputStream in;
String fileName="test.bas";
System.out.println("basic parser");
if (args.length>0){
fileName=args[0];
}
try{
in=new FileInputStream(fileName);
} catch(IOException e) {
System.out.println(fileName+"を読み込めませんでした。");
return;
}
LexicalAnalyzer lex = new LexicalAnalyzerImpl(in);
Environment env = new Environment(lex);
try {
Node program = Program.getHandler(env);
program.parse();
System.out.println(program.getValue());
} catch (IOException e){
System.out.println("I/Oエラーが発生しました。");
} catch (SyntaxException e){
System.out.println(e.getMessage());
} catch (CalcurateException e){
System.out.println(e.getMessage());
} catch (Exception e){
System.out.println("不明な例外:"+e);
} finally {
try {
in.close();
} catch(IOException e){
System.out.println("ファイルのクローズに失敗しました。");
}
}
}
}