/** Sanity checks the AST. This is by verifing the normalization passes do nothing. */
private void sanityCheckNormalization(Node externs, Node root) {
// Verify nothing has inappropriately denormalize the AST.
CodeChangeHandler handler = new CodeChangeHandler.ForbiddenChange();
compiler.addChangeHandler(handler);
// TODO(johnlenz): Change these normalization checks Preconditions and
// Exceptions into Errors so that it is easier to find the root cause
// when there are cascading issues.
new PrepareAst(compiler, true).process(null, root);
if (compiler.isNormalized()) {
(new Normalize(compiler, true)).process(externs, root);
boolean checkUserDeclarations = true;
CompilerPass pass = new Normalize.VerifyConstants(compiler, checkUserDeclarations);
pass.process(externs, root);
}
compiler.removeChangeHandler(handler);
}
