package org.rascalmpl.interpreter.cursors;
import org.rascalmpl.library.util.Cursor;
import org.rascalmpl.value.IList;
import org.rascalmpl.value.ITuple;
import org.rascalmpl.value.IValue;
import org.rascalmpl.value.IValueFactory;
public class TupleLabelContext extends Context {
private final Context ctx;
private final String label;
private final ITuple tuple;
public TupleLabelContext(Context ctx, String label, ITuple tuple) {
this.ctx = ctx;
this.label = label;
this.tuple = tuple;
}
@Override
public IValue up(IValue focus) {
return new TupleCursor(tuple.set(label, focus), ctx);
}
@Override
public IList toPath(IValueFactory vf) {
return ctx.toPath(vf).append(vf.constructor(Cursor.Nav_fieldPosition, vf.integer(tuple.getType().getFieldIndex(label))));
}
}