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# MTLStructType

A description of a structure.

```
class MTLStructType
```

## Overview

[`MTLStructType`](/documentation/Metal/MTLStructType) is part of the reflection API that allows Metal framework code to query details of a struct that is passed as an argument of a Metal shading language function. Don’t create [`MTLStructType`](/documentation/Metal/MTLStructType) instances directly; instead query the [`bufferStructType`](/documentation/Metal/MTLArgument/bufferStructType) property of an [`MTLArgument`](/documentation/Metal/MTLArgument) instance, or call the [`structType()`](/documentation/Metal/MTLStructMember/structType()) method for an [`MTLStructMember`](/documentation/Metal/MTLStructMember) instance. To examine the details of the struct, you can recursively drill down the [`members`](/documentation/Metal/MTLStructType/members) property of the [`MTLStructType`](/documentation/Metal/MTLStructType) instance, which contains details about struct members, each of which is represented by an [`MTLStructMember`](/documentation/Metal/MTLStructMember) instance.

## Topics

### Obtaining information about struct members

[`members`](/documentation/Metal/MTLStructType/members)

An array of instances that describe the fields in the struct.

[`memberByName(_:)`](/documentation/Metal/MTLStructType/memberByName(_:))

Provides a representation of a struct member.


---

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