Java Code Examples for jdk.nashorn.internal.ir.Block#setFinish()

The following examples show how to use jdk.nashorn.internal.ir.Block#setFinish() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: Parser.java    From jdk8u60 with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 2
Source File: Parser.java    From nashorn with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 3
Source File: Parser.java    From openjdk-jdk8u with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 4
Source File: Parser.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 5
Source File: Parser.java    From jdk8u_nashorn with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 6
Source File: Parser.java    From hottub with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 7
Source File: Parser.java    From TencentKona-8 with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 8
Source File: Parser.java    From openjdk-8-source with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 9
Source File: Parser.java    From openjdk-8 with GNU General Public License v2.0 5 votes vote down vote up 
/**
 * Get the statements in a block.
 * @return Block statements.
 */
private Block getBlock(final boolean needsBraces) {
    // Set up new block. Captures LBRACE.
    Block newBlock = newBlock();
    try {
        // Block opening brace.
        if (needsBraces) {
            expect(LBRACE);
        }
        // Accumulate block statements.
        statementList();

    } finally {
        newBlock = restoreBlock(newBlock);
    }

    final int possibleEnd = Token.descPosition(token) + Token.descLength(token);

    // Block closing brace.
    if (needsBraces) {
        expect(RBRACE);
    }

    newBlock.setFinish(possibleEnd);

    return newBlock;
}
Example 10
Source File: Parser.java    From hottub with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 11
Source File: Parser.java    From nashorn with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 12
Source File: Parser.java    From jdk8u_nashorn with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 13
Source File: Parser.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 14
Source File: Parser.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 15
Source File: Parser.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 16
Source File: Parser.java    From openjdk-jdk8u with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 17
Source File: Parser.java    From jdk8u60 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}
Example 18
Source File: Parser.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * SwitchStatement :
 *      switch ( Expression ) CaseBlock
 *
 * CaseBlock :
 *      { CaseClauses? }
 *      { CaseClauses? DefaultClause CaseClauses }
 *
 * CaseClauses :
 *      CaseClause
 *      CaseClauses CaseClause
 *
 * CaseClause :
 *      case Expression : StatementList?
 *
 * DefaultClause :
 *      default : StatementList?
 *
 * See 12.11
 *
 * Parse SWITCH statement.
 */
private void switchStatement() {
    final int  switchLine  = line;
    final long switchToken = token;
    // SWITCH tested in caller.
    next();

    // Create and add switch statement.
    SwitchNode switchNode = new SwitchNode(switchLine, switchToken, Token.descPosition(switchToken), null, new ArrayList<CaseNode>(), null);
    lc.push(switchNode);

    try {
        expect(LPAREN);
        switchNode = switchNode.setExpression(lc, expression());
        expect(RPAREN);

        expect(LBRACE);

        // Prepare to accumulate cases.
        final List<CaseNode> cases = new ArrayList<>();
        CaseNode defaultCase = null;

        while (type != RBRACE) {
            // Prepare for next case.
            Expression caseExpression = null;
            final long caseToken = token;

            switch (type) {
            case CASE:
                next();
                caseExpression = expression();
                break;

            case DEFAULT:
                if (defaultCase != null) {
                    throw error(AbstractParser.message("duplicate.default.in.switch"));
                }
                next();
                break;

            default:
                // Force an error.
                expect(CASE);
                break;
            }

            expect(COLON);

            // Get CASE body.
            final Block statements = getBlock(false);
            final CaseNode caseNode = new CaseNode(caseToken, finish, caseExpression, statements);
            statements.setFinish(finish);

            if (caseExpression == null) {
                defaultCase = caseNode;
            }

            cases.add(caseNode);
        }

        switchNode = switchNode.setCases(lc, cases, defaultCase);
        next();
        switchNode.setFinish(finish);

        appendStatement(switchNode);
    } finally {
        lc.pop(switchNode);
    }
}