---
title: "ClikaRT::nn::ConstantPad"
sidebar_label: "ConstantPad"
description: "Pads with a constant value. The module form of ClikaRT::ops::constant_pad, which documents the full contract (shapes, dtypes, errors); construct once, then call it like a function."
---

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**Header:** `ClikaRT/nn/generated/padding.h`  
**Inherits:** [`ClikaRT::nn::Module`](./Module.md)

Pads with a constant value. The module form of [`ClikaRT::ops::constant_pad`](../ops/constant_pad.md#constant_pad), which documents the full contract (shapes, dtypes, errors); construct once, then call it like a function.

## Member functions

### ConstantPad(ConstantPadOptions) {#ConstantPad}

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`explicit` **`ConstantPad`**([`ConstantPadOptions`](./ConstantPadOptions.md) `options`)

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Constructs the module from [`options`](./ConstantPad.md#options).

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Declared in `ClikaRT/nn/generated/padding.h`, line 72

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### ConstantPad(vector\<ScalarOrTensor\>, optional\<ScalarOrTensor\>) {#ConstantPad-2}

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`explicit` **`ConstantPad`**(<br />
&nbsp;&nbsp;&nbsp;&nbsp;`std::vector<`[`ScalarOrTensor`](../ScalarOrTensor.md)`>` `padding`,<br />
&nbsp;&nbsp;&nbsp;&nbsp;`std::optional<`[`ScalarOrTensor`](../ScalarOrTensor.md)`>` `value` `=` `std::nullopt`<br />
)

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`ConstantPad(padding, value)`: the positional form of `ConstantPadOptions(padding, value)`.

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Declared in `ClikaRT/nn/generated/padding.h`, line 75

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### forward() {#forward}

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[`Tensor`](../Tensor.md) **`forward`**([`Tensor`](../Tensor.md) `input`) `const`

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[`forward_impl`](./ConstantPad.md#forward), unwrapped: raises [`ClikaRT::Error`](../Error.md) on failure.

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Declared in `ClikaRT/nn/generated/padding.h`, line 89

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### operator()() {#operator-call}

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[`Tensor`](../Tensor.md) **`operator()`**([`Tensor`](../Tensor.md) `input`) `const`

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Same as [`forward`](./ConstantPad.md#forward).

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Declared in `ClikaRT/nn/generated/padding.h`, line 93

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### options() {#options}

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`const` [`ConstantPadOptions`](./ConstantPadOptions.md)`&` **`options`**() `const`

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The settings this module was constructed with.

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Declared in `ClikaRT/nn/generated/padding.h`, line 97

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