Examples of org.renjin.sexp.Environment

org.renjin.sexp.Environment

The Environment data type.

Environments can be thought of as consisting of two things:

A frame, consisting of a set of symbol-value pairs, and
an enclosure, a pointer to an enclosing environment.

When R looks up the vbalue for a symbol the frame is examined and if a matching symbol is found its value will be returned. If not, the enclosing environment is then accessed and the process repeated. Environments form a tree structure in which the enclosures play the role of parents. The tree of environments is rooted in an empty environment, available through emptyenv(), which has no parent. It is the direct parent of the environment of the base package (available through the baseenv() function). Formerly baseenv() had the special value {@code NULL}, but as from version 2.4.0, the use of {@code NULL} as an environment is defunct.

    } else if(warnMode == 0) {
      // store warnings until end of evaluation
      
      ListVector.NamedBuilder lastWarning = new ListVector.NamedBuilder();
     
      Environment baseEnv = context.getEnvironment().getBaseEnvironment();
      if(baseEnv.hasVariable(LAST_WARNING)) {
        lastWarning.addAll((ListVector)baseEnv.getVariable(LAST_WARNING).force(context));
      }
      
      lastWarning.add(message, call);
      baseEnv.setVariable(LAST_WARNING, lastWarning.build());
    }
  }

Examples of org.renjin.sexp.Environment

Related Classes of org.renjin.sexp.Environment