ANTLR4：预期ID获得ID

Question

为什么ANTLR无法正确识别令牌？ 我认为问题与＆＃34;会员访问者＆＃34;有一个ID和＆＃34; CustomMethodCall＆＃34;也是统治。

语法

**statement 
    : varDeclaration  
    | customMethodCall;
customMethodCall : (memberAccessor '.)? ID L_PAREN expressionList R_PAREN;

memberAcessorPart 
    : ID                            
    | 'this'
    | ID '.getAt' L_PAREN expression R_PAREN
    | ID arrayGet: 
    | ID L_PAREN expressionList R_PAREN;
memberAccessor 
    : memberAcessorPart (ACESSAR memberAcessorPart)*;
**

protected override void ReportNoViableAlternative (Parser recognizer, NoViableAltException e) {
        string[] expected = new String[e.GetExpectedTokens ().Count];
        int[] expectedInts = e.GetExpectedTokens ().ToArray ();
        for (int i = 0; i < expected.Length; i++) {
            if (expectedInts[i] == -1) expected[i] = "<EOF>";
            else expected[i] = PortuProParser.DefaultVocabulary.GetDisplayName (expectedInts[i]);

        }
        string c = PortuProParser.DefaultVocabulary.GetDisplayName (e.StartToken.Type);
        if (expected.ToList ().IndexOf (c) == -1)
            throw new PortuProException (e.StartToken.Line, e.StartToken.Column,  "Entrada desconhecida. '" + e.StartToken.Text + "'\n\nEsperado: '" + string.Join (", ", expected) + "'");

    }

我已经上过＆＃39; c＆＃39; ＆＃39; ID＆＃39;以及＆＃39; ID＆＃39;预期作为代币。