Examples of com.google.caja.plugin.stages.InferFilePositionsStage

com.google.caja.plugin.stages.InferFilePositionsStage

Infers file positions for synthetic nodes based on surrounding nodes, so that we can generate useful error messages.

This does some very simple inference by assuming that a parent node spans all of its children, and if the children come from multiple {@link InputSource source}s chooses the region spanning the source from which the most children come.

We could do more advanced propagation by using a constraint solver to capture constraints like child-follows-sibling and parent-contains-children but the current approach is sufficient to do useful inference on

 ___.readPub(tmp___, 'y')

where {@code 'y'} has a proper FilePosition, perhaps because it wasderived from {@link com.google.caja.parser.quasiliteral.Rule#toStringLiteral}which propagates position info. @author mikesamuel@gmail.com

          }
        }.given(CAJOLED_MODULES).produces(ONE_CAJOLED_MODULE),


        new Tool() {
          public void operate(PlanInputs in, List<Pipeline.Stage<Jobs>> out) {
            out.add(new InferFilePositionsStage());
          }
        }.given(ONE_CAJOLED_MODULE).produces(ONE_CAJOLED_MODULE_DEBUG),


        new Tool() {
          public void operate(PlanInputs in, List<Pipeline.Stage<Jobs>> out) {

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