---
title: Publishers.Comparison
framework: combine
role: symbol
role_heading: Structure
path: combine/publishers/comparison
---

# Publishers.Comparison

A publisher that republishes items from another publisher only if each new item is in increasing order from the previously-published item.

## Declaration

```swift
struct Comparison<Upstream> where Upstream : Publisher
```

## Topics

### Creating a comparison publisher

- [init(upstream:areInIncreasingOrder:)](combine/publishers/comparison/init(upstream:areinincreasingorder:).md)

### Declaring supporting types

- [Publishers.Comparison.Output](combine/publishers/comparison/output.md)
- [Publishers.Comparison.Failure](combine/publishers/comparison/failure.md)

### Inspecting publisher properties

- [upstream](combine/publishers/comparison/upstream.md)
- [areInIncreasingOrder](combine/publishers/comparison/areinincreasingorder.md)

## Relationships

### Conforms To

- [Publisher](combine/publisher.md)

## See Also

### Applying mathematical operations on elements

- [Publishers.Count](combine/publishers/count.md)
- [Publishers.TryComparison](combine/publishers/trycomparison.md)