Poison

type()

发表于

SetTypeLexer.g4:

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lexer grammar SetTypeLexer;

tokens { STRING }

DOUBLE:        '"' .*? '"' -> type(STRING);
SINGLE:        '\'' .*? '\'' -> type(STRING);
WS:            [ \r\t\n]+ -> skip;

SetTypeParser.g4:

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parser grammar SetTypeParser;

options { tokenVocab=SetTypeLexer; }

root
    : STRING STRING EOF
    ;

Java Code:

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import org.antlr.v4.runtime.CharStream;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.Lexer;
import org.antlr.v4.runtime.tree.ParseTree;

import java.io.IOException;
import java.net.URISyntaxException;

public class SetTypeParseTest {

    public static void main(String[] args) throws URISyntaxException, IOException {
        CharStream charStream = CharStreams.fromString("  \"aaa\"  'bbb'  ");
        Lexer lexer = new SetTypeLexer(charStream);

        CommonTokenStream tokens = new CommonTokenStream(lexer);
        SetTypeParser parser = new SetTypeParser(tokens);
        ParseTree parseTree = parser.root();

        System.out.println(parseTree.toStringTree(parser));
    }

}

Output:

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(root "aaa" 'bbb' <EOF>)
Reference

Lexer Rules - type()
antlrworks2/TemplateLexer.g4 at master · sharwell/antlrworks2 · GitHub