Examples with EmptyStatement com.google.devtools.j2objc.ast.EmptyStatement used on opensource projects

Example 6 with EmptyStatement

use of com.google.devtools.j2objc.ast.EmptyStatement in project j2objc by google.

the class LabelRewriter method endVisit.

@Override
public void endVisit(LabeledStatement node) {
    Statement loopBody = getLoopBody(node.getBody());
    final String labelIdentifier = node.getLabel().getIdentifier();
    final boolean[] hasContinue = new boolean[1];
    final boolean[] hasBreak = new boolean[1];
    node.accept(new TreeVisitor() {

        @Override
        public void endVisit(ContinueStatement node) {
            if (node.getLabel() != null && node.getLabel().getIdentifier().equals(labelIdentifier)) {
                hasContinue[0] = true;
                node.setLabel(new SimpleName("continue_" + labelIdentifier));
            }
        }

        @Override
        public void endVisit(BreakStatement node) {
            if (node.getLabel() != null && node.getLabel().getIdentifier().equals(labelIdentifier)) {
                hasBreak[0] = true;
                node.setLabel(new SimpleName("break_" + labelIdentifier));
            }
        }
    });
    if (hasContinue[0]) {
        assert loopBody != null : "Continue statements must be inside a loop.";
        LabeledStatement newLabelStmt = new LabeledStatement("continue_" + labelIdentifier);
        newLabelStmt.setBody(new EmptyStatement());
        // Put the loop body into an inner block so the continue label is outside
        // the scope of any variable initializations.
        Block newBlock = new Block();
        loopBody.replaceWith(newBlock);
        newBlock.addStatement(loopBody);
        newBlock.addStatement(newLabelStmt);
    }
    if (hasBreak[0]) {
        LabeledStatement newLabelStmt = new LabeledStatement("break_" + labelIdentifier);
        newLabelStmt.setBody(new EmptyStatement());
        TreeUtil.insertAfter(node, newLabelStmt);
    }
    if (hasContinue[0] || hasBreak[0]) {
        // Replace this node with its statement, thus deleting the label.
        node.replaceWith(TreeUtil.remove(node.getBody()));
    }
}