Java 多输入
我正在尝试将ANTLR用于属性语法。这是我的驱动程序代码:Java 多输入,java,file,input,antlr,grammar,Java,File,Input,Antlr,Grammar,我正在尝试将ANTLR用于属性语法。这是我的驱动程序代码: import org.antlr.runtime.ANTLRStringStream; import org.antlr.v4.runtime.ANTLRFileStream; import org.antlr.v4.runtime.ANTLRInputStream; import org.antlr.v4.runtime.CharStream; import org.antlr.v4.runtime.CommonTokenStream
import org.antlr.runtime.ANTLRStringStream;
import org.antlr.v4.runtime.ANTLRFileStream;
import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CommonTokenStream;
@SuppressWarnings({ "deprecation", "unused" })
public class mymain {
public static void main(String[] args) {
try {
ANTLRInputStream input = new ANTLRFileStream("/home/vkmanojk/eclipse-workspace/17040/src/input");
statementLexer lexer = new statementLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
statementParser parser = new statementParser(tokens);
System.out.println(parser.expression());
} catch(Exception e) {
System.out.println(e);
}
}
}
此程序仅适用于输入文件中的单个输入。如何更改main函数,使其适用于输入文件中的多个输入
提前感谢如果您的输入文件包含多个
表达式
s,只需添加与一个或多个表达式
s匹配的解析器规则:
expressions
: expression ( DELIMITER expression )*
;
// Your existing expression rule
expression
: ...
;
DELIMITER
: '\r'? '\n'
;
如果表达式的分隔符不是换行符,当然要相应地更改DELIMITER