Java 类org.mozilla.javascript.ast.Label 实例源码

private void recordLabel(Label label, LabeledStatement bundle)
    throws IOException
{
    // current token should be colon that primaryExpr left untouched
    if (peekToken() != Token.COLON) codeBug();
    consumeToken();
    String name = label.getName();
    if (labelSet == null) {
        labelSet = new HashMap<String,LabeledStatement>();
    } else {
        LabeledStatement ls = labelSet.get(name);
        if (ls != null) {
            if (compilerEnv.isIdeMode()) {
                Label dup = ls.getLabelByName(name);
                reportError("msg.dup.label",
                            dup.getAbsolutePosition(), dup.getLength());
            }
            reportError("msg.dup.label",
                        label.getPosition(), label.getLength());
        }
    }
    bundle.addLabel(label);
    labelSet.put(name, bundle);
}

private AstNode name(int ttFlagged, int tt) throws IOException {
    String nameString = ts.getString();
    int namePos = ts.tokenBeg, nameLineno = ts.lineno;
    if (0 != (ttFlagged & TI_CHECK_LABEL) && peekToken() == Token.COLON) {
        // Do not consume colon.  It is used as an unwind indicator
        // to return to statementHelper.
        Label label = new Label(namePos, ts.tokenEnd - namePos);
        label.setName(nameString);
        label.setLineno(ts.lineno);
        return label;
    }
    // Not a label.  Unfortunately peeking the next token to check for
    // a colon has biffed ts.tokenBeg, ts.tokenEnd.  We store the name's
    // bounds in instance vars and createNameNode uses them.
    saveNameTokenData(namePos, nameString, nameLineno);

    if (compilerEnv.isXmlAvailable()) {
        return propertyName(-1, nameString, 0);
    } else {
        return createNameNode(true, Token.NAME);
    }
}

private void recordLabel(Label label, LabeledStatement bundle)
    throws IOException
{
    // current token should be colon that primaryExpr left untouched
    if (peekToken() != Token.COLON) codeBug();
    consumeToken();
    String name = label.getName();
    if (labelSet == null) {
        labelSet = new HashMap<String,LabeledStatement>();
    } else {
        LabeledStatement ls = labelSet.get(name);
        if (ls != null) {
            if (compilerEnv.isIdeMode()) {
                Label dup = ls.getLabelByName(name);
                reportError("msg.dup.label",
                            dup.getAbsolutePosition(), dup.getLength());
            }
            reportError("msg.dup.label",
                        label.getPosition(), label.getLength());
        }
    }
    bundle.addLabel(label);
    labelSet.put(name, bundle);
}

private AstNode name(int ttFlagged, int tt) throws IOException {
    String nameString = ts.getString();
    int namePos = ts.tokenBeg, nameLineno = ts.lineno;
    if (0 != (ttFlagged & TI_CHECK_LABEL) && peekToken() == Token.COLON) {
        // Do not consume colon.  It is used as an unwind indicator
        // to return to statementHelper.
        Label label = new Label(namePos, ts.tokenEnd - namePos);
        label.setName(nameString);
        label.setLineno(ts.lineno);
        return label;
    }
    // Not a label.  Unfortunately peeking the next token to check for
    // a colon has biffed ts.tokenBeg, ts.tokenEnd.  We store the name's
    // bounds in instance vars and createNameNode uses them.
    saveNameTokenData(namePos, nameString, nameLineno);

    if (compilerEnv.isXmlAvailable()) {
        return propertyName(-1, nameString, 0);
    } else {
        return createNameNode(true, Token.NAME);
    }
}

private Node transformLabeledStatement(LabeledStatement ls) {
    Label label = ls.getFirstLabel();
    List<Label> labels = ls.getLabels();
    decompiler.addName(label.getName());
    if (labels.size() > 1) {
        // more than one label
        for (Label lb : labels.subList(1, labels.size())) {
            decompiler.addEOL(Token.COLON);
            decompiler.addName(lb.getName());
        }
    }
    if (ls.getStatement().getType() == Token.BLOCK) {
        // reuse OBJECTLIT for ':' workaround, cf. transformObjectLiteral()
        decompiler.addToken(Token.OBJECTLIT);
        decompiler.addEOL(Token.LC);
    } else {
        decompiler.addEOL(Token.COLON);
    }
    Node statement = transform(ls.getStatement());
    if (ls.getStatement().getType() == Token.BLOCK) {
        decompiler.addEOL(Token.RC);
    }

    // Make a target and put it _after_ the statement node.  Add in the
    // LABEL node, so breaks get the right target.
    Node breakTarget = Node.newTarget();
    Node block = new Node(Token.BLOCK, label, statement, breakTarget);
    label.target = breakTarget;

    return block;
}

private Node transformLabeledStatement(LabeledStatement ls) {
    Label label = ls.getFirstLabel();
    List<Label> labels = ls.getLabels();
    decompiler.addName(label.getName());
    if (labels.size() > 1) {
        // more than one label
        for (Label lb : labels.subList(1, labels.size())) {
            decompiler.addEOL(Token.COLON);
            decompiler.addName(lb.getName());
        }
    }
    if (ls.getStatement().getType() == Token.BLOCK) {
        // reuse OBJECTLIT for ':' workaround, cf. transformObjectLiteral()
        decompiler.addToken(Token.OBJECTLIT);
        decompiler.addEOL(Token.LC);
    } else {
        decompiler.addEOL(Token.COLON);
    }
    Node statement = transform(ls.getStatement());
    if (ls.getStatement().getType() == Token.BLOCK) {
        decompiler.addEOL(Token.RC);
    }

    // Make a target and put it _after_ the statement node.  Add in the
    // LABEL node, so breaks get the right target.
    Node breakTarget = Node.newTarget();
    Node block = new Node(Token.BLOCK, label, statement, breakTarget);
    label.target = breakTarget;

    return block;
}

private void print(LabeledStatement node) throws IOException {
    for (Label label : node.getLabels()) {
        writer.append(label.getName()).append(':').ws();
    }
    print(node.getStatement());
}