---
title: 简介
description: "用于圈定Subgraph边界："
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/ascendgraphapi/atlasgeapi_07_0229.html
sourcePath: /source/zh/canncommercial/900/API/ascendgraphapi/atlasgeapi_07_0229.html
indexId: 4306b6754f9381884fb1f980599451959230e6cf3e11679b64ca7f01a93cee3e72
---
# 简介

用于圈定Subgraph边界：

- Subgraph需要自包含除了边界的输出算子，边界内所有算子的数据输出消费者都要在边界内。若有边界外的消费者，会导致消费者在重写后找不到原始Tensor。
- Subgraph中的节点不能跨图。
- Subgraph不能包含所在图的边界算子（data/netoutput/variable等）。

#### 需要包含的头文件

```
#include <ge/fusion/subgraph_boundary.h>
```


#### Public成员函数

```
SubgraphBoundary()
SubgraphBoundary(std::vector<SubgraphInput> inputs, std::vector<SubgraphOutput> outputs)
SubgraphBoundary(const SubgraphBoundary &other) noexcept
SubgraphBoundary &operator=(SubgraphBoundary &&other) noexcept
SubgraphBoundary &operator=(const SubgraphBoundary &other) noexcept
Status AddInput(int64_t index, SubgraphInput input)
Status AddOutput(int64_t index, SubgraphOutput output)
Status GetInput(int64_t index, SubgraphInput &subgraph_input) const
Status GetAllInputs(std::vector<SubgraphInput> &subgraph_input) const
Status GetOutput(int64_t index, SubgraphOutput &subgraph_output) const
Status GetAllOutputs(std::vector<SubgraphOutput> &subgraph_outputs) const
```