Compiler.java 文件源码

@Override public String visitSource(MainParser.SourceContext ctx) {
    StringBuilder program = new StringBuilder("v2.0 raw\n");

    for (ParseTree child : ctx.children) {
        String currentByte = visit(child);
        if (! currentByte.isEmpty()) { // empty string doesn't effect program output
            if (currentByte.matches("^[01]{8}$")) {
                int value = Integer.parseInt(currentByte, 2);
                program.append(toBase(value, 16, 2) + " ");
                bytes++; // running count of bytes is important for visitAssignLabel
            } else {
                throw new ParseCancellationException(new com.github.charmoniumq.assembler.backend.InternalError(String.format("Invalid byte produced: %s", currentByte)));
            }
        }
    }
    return program.toString();
}