---
title: "build_NilCoalesce(lhs:rhs:)"
framework: foundation
role: symbol
role_heading: Type Method
path: "foundation/predicateexpressions/build_nilcoalesce(lhs:rhs:)"
---

# build_NilCoalesce(lhs:rhs:)

## Declaration

```swift
static func build_NilCoalesce<LHS, RHS>(lhs: LHS, rhs: RHS) -> PredicateExpressions.NilCoalesce<LHS, RHS> where LHS : PredicateExpression, RHS : PredicateExpression, LHS.Output == RHS.Output?
```