---
title: Params
summary: An iterator over the parameters of a MIME.
url: https://www.fastly.com/documentation/reference/compute/sdks/rust/fastly/mime/struct.Params/
---

**Kind:** Struct  
**Module:** [mime](https://www.fastly.com/documentation/reference/compute/sdks/rust/fastly/mime/)  
**Package:** fastly 0.13.1

```rust
pub struct Params<'a>(/* private fields */);
```

An iterator over the parameters of a MIME.

## Trait implementations

### impl Debug for Params

#### fmt

```rust
fn fmt(&self, fmt: &mut Formatter<'_>) -> Result
```

**Parameters**

- `self`: `&Self`
- `fmt`: `&mut fmt::Formatter`

**Returns**

`fmt::Result`

### impl Iterator for Params

#### next

```rust
fn next(&mut self) -> Option<(Name<'a>, Name<'a>)>
```

**Parameters**

- `self`: `&mut Self`

**Returns**

`Option<(Name, Name)>`

#### size_hint

```rust
fn size_hint(&self) -> (usize, Option<usize>)
```

**Parameters**

- `self`: `&Self`

**Returns**

`(usize, Option<usize>)`

## Auto trait implementations

- `Freeze`
- `RefUnwindSafe`
- `Send`
- `Sync`
- `Unpin`
- `UnsafeUnpin`
- `UnwindSafe`

## Blanket implementations

- `Any`
- `Borrow<T>`
- `BorrowMut<T>`
- `From<T>`
- `Into<U>`
- `IntoIterator`
- `TryFrom<U>`
- `TryInto<U>`