---
title: "build_contains(_:_:)"
framework: foundation
role: symbol
role_heading: Type Method
path: "foundation/predicateexpressions/build_contains(_:_:)-9ferb"
---

# build_contains(_:_:)

## Declaration

```swift
static func build_contains<Subject, Regex>(_ subject: Subject, _ regex: Regex) -> PredicateExpressions.StringContainsRegex<Subject, Regex> where Subject : PredicateExpression, Regex : PredicateExpression, Subject.Output : BidirectionalCollection, Regex.Output : RegexComponent, Subject.Output.SubSequence == Substring
```