"nested2": { "nested2arr": [0,1,2], "nested3": {
        "nested4": { "depth": "recursion" }}
			}
		}
  },
  "2": {
    "nullfield": null,
    "id": -2
  }
}`
	)

	decoder := NewDecoder(mkReader(body), 2)

	for mv = range decoder.Stream() {
		counter++
		t.Logf("depth=%d offset=%d len=%d (%v)", mv.Depth, mv.Offset, mv.Length, mv.Value)
	}

	if err := decoder.Err(); err != nil {

    public void setDepth_Equal(Integer depth) {
        setDepth_Term(depth, null);
    }

    public void setDepth_Equal(Integer depth, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setDepth_Term(depth, opLambda);
    }

    public void setDepth_Term(Integer depth) {
        setDepth_Term(depth, null);
    }

    public void setDepth_Equal(Integer depth) {
        setDepth_Term(depth, null);
    }

    public void setDepth_Equal(Integer depth, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setDepth_Term(depth, opLambda);
    }

    public void setDepth_Term(Integer depth) {
        setDepth_Term(depth, null);
    }

			Length:    int(d.pos - offset),
			Depth:     d.depth,
			Value:     i,
			ValueType: t,
		}
	}
	return i, err
}

// return whether, at the current depth, the value being decoded will
// be emitted to stream
func (d *Decoder) willEmit() bool {
	if d.emitRecursive {
		return d.depth >= d.emitDepth
	}
	return d.depth == d.emitDepth
}

`jstream` is a streaming JSON parser and value extraction library for Go.

Unlike most JSON parsers, `jstream` is document position- and depth-aware -- this enables the extraction of values at a specified depth, eliminating the overhead of allocating encompassing arrays or objects; e.g:

Using the below example document:

                                    <label for="depth" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.depth"/></label>
                                    <div class="form-inline col-sm-9">
                                        <la:errors property="depth"/>
                                        <input type="number" name="depth" id="depth"

                                    </tr>
                                    <tr>
                                        <th><la:message key="labels.depth"/></th>
                                        <td>${f:h(depth)}<la:hidden property="depth"/></td>
                                    </tr>
                                    <tr>

                                    </tr>
                                    <tr>
                                        <th><la:message key="labels.depth"/></th>
                                        <td>${f:h(depth)}<la:hidden property="depth"/></td>
                                    </tr>
                                    <tr>

        }
        return builder.toString()
    }

    def format(Node node, Appendable target, int depth, boolean prettyPrint, boolean indentSelf) {
        if (node instanceof Element) {
            Element element = (Element) node

            if (indentSelf && depth > 0) {
                target.append('\n')
                depth.times { target.append('    ') }
            }

            target.append("<${element.tagName}")

    }

    public void setDepth_Avg(ConditionOptionCall<AvgAggregationBuilder> opLambda) {
        setDepth_Avg("depth", opLambda);
    }

    public void setDepth_Avg(String name, ConditionOptionCall<AvgAggregationBuilder> opLambda) {
        AvgAggregationBuilder builder = regAvgA(name, "depth");
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }