Examples of com.google.gwt.dev.js.ast.JsVars$JsVar

com.google.gwt.dev.js.ast.JsVars
A var declared using the JavaScript var statement.

  }


  private JsVars mapVar(Node varNode) throws JsParserException {
    SourceInfo info = makeSourceInfo(varNode);
    pushSourceInfo(info);
    JsVars toVars = new JsVars(info);
    Node fromVar = varNode.getFirstChild();
    while (fromVar != null) {
      // Use a conservative name allocation strategy that allocates all names
      // from the function's scope, even the names of properties in field
      // literals.
      //
      String fromName = fromVar.getString();
      JsName toName = getScope().declareName(fromName);
      JsVars.JsVar toVar = new JsVars.JsVar(makeSourceInfo(fromVar), toName);


      Node fromInit = fromVar.getFirstChild();
      if (fromInit != null) {
        JsExpression toInit = mapExpression(fromInit);
        toVar.setInitExpr(toInit);
      }
      toVars.add(toVar);


      fromVar = fromVar.getNext();
    }


    popSourceInfo();

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   */
  private static void createVars(JsProgram program, JsBlock block,
      Collection<JsStringLiteral> toCreate, Map<JsStringLiteral, JsName> names) {
    if (toCreate.size() > 0) {
      // Create the pool of variable names.
      JsVars vars = new JsVars(program.createSourceInfoSynthetic(
          JsStringInterner.class, "Interned string pool"));
      SourceInfo sourceInfo = program.createSourceInfoSynthetic(
          JsStringInterner.class, "Interned string assignment");
      for (JsStringLiteral literal : toCreate) {
        JsVar var = new JsVar(sourceInfo, names.get(literal));
        var.setInitExpr(literal);
        vars.add(var);
      }
      block.getStatements().add(0, vars);
    }
  }

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  /**
   * Make a new, empty {@link JsVars} that is a child of x.
   */
  private JsVars makeNewChildVars(JsVars x) {
    return new JsVars(x.getSourceInfo().makeChild(
        JsBreakUpLargeVarStatements.class,
        "breaking up a large vars statement into smaller ones"));
  }

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        expression = program.getUndefinedLiteral();
      }


    } else if (statement instanceof JsVars) {
      // Create a comma expression for variable initializers
      JsVars vars = (JsVars) statement;


      // Rely on comma expression cleanup to remove this later.
      expression = program.getNullLiteral();


      for (JsVar var : vars) {

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      assert !statements.isEmpty();


      // Find or create the JsVars as the first statement
      SourceInfo sourceInfo = x.getSourceInfo().makeChild(
          InliningVisitor.class, "Synthetic locals");
      JsVars vars;
      if (statements.get(0) instanceof JsVars) {
        vars = (JsVars) statements.get(0);
      } else {
        vars = new JsVars(sourceInfo);
        statements.add(0, vars);
      }


      // Add all variables
      for (JsName name : newLocalVariables) {
        vars.add(new JsVar(sourceInfo, name));
      }
    }

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      }
    }


    @Override
    public void endVisit(JsVars x, JsContext<JsStatement> ctx) {
      JsVars strippedVars = new JsVars(x.getSourceInfo().makeChild(
          MustExecVisitor.class, "Simplified execution"));
      boolean mustReplace = false;
      for (JsVar var : x) {
        JsVar strippedVar = new JsVar(var.getSourceInfo().makeChild(
            MustExecVisitor.class, "Simplified execution"), var.getName());
        strippedVars.add(strippedVar);
        if (var.getInitExpr() != null) {
          mustReplace = true;
        }
      }
      if (mustReplace) {

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    JsVar stackDepthVar = new JsVar(info, stackDepth);
    stackDepthVar.setInitExpr(program.getNumberLiteral(info, -1));
    JsVar lineNumbersVar = new JsVar(info, lineNumbers);
    lineNumbersVar.setInitExpr(new JsArrayLiteral(info));


    JsVars vars;
    JsStatement first = program.getGlobalBlock().getStatements().get(0);
    if (first instanceof JsVars) {
      vars = (JsVars) first;
    } else {
      vars = new JsVars(info);
      program.getGlobalBlock().getStatements().add(0, vars);
    }
    vars.add(stackVar);
    vars.add(stackDepthVar);
    vars.add(lineNumbersVar);
  }

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        // Add push and pop statements
        statements.add(idx, push(currentFunction));
        addPopAtEndOfBlock(x, false);


        // Add any needed variables
        JsVars vars;
        if (statements.get(0) instanceof JsVars) {
          vars = (JsVars) statements.get(0);
        } else {
          vars = new JsVars(currentFunction.getSourceInfo());
          statements.add(0, vars);
        }
        for (JsVar var : varsToAdd) {
          vars.add(var);
        }
      }
    }

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            }
          }
        }


        if (stat instanceof JsVars) {
          JsVars vars = (JsVars) stat;
          for (JsVar var : vars) {
            JField field = map.nameToField(var.getName());
            if (field != null) {
              System.out.println(fullNameString(field));
            }

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   * <code>alreadyLoadedPredicate</code>.
   */
  private JsStatement removeSomeVars(JsVars stat,
      LivenessPredicate currentLivenessPredicate,
      LivenessPredicate alreadyLoadedPredicate) {
    JsVars newVars = new JsVars(stat.getSourceInfo().makeChild(
        FragmentExtractor.class, "subsetting of interned values"));


    for (JsVar var : stat) {
      if (isLive(var, currentLivenessPredicate)
          && !isLive(var, alreadyLoadedPredicate)) {
        newVars.add(var);
      }
    }


    if (newVars.getNumVars() == stat.getNumVars()) {
      // no change
      return stat;
    }


    if (newVars.iterator().hasNext()) {
      /*
       * The new variables are non-empty; return them.
       */
      return newVars;
    } else {

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