Compiling with swift-numerics failed with error in ApproximateEquality.swift

Related Projects Swift Numerics
1

I import a library 'Chart' as project into my project and compile, the result is failed due to an error in dependency package 'swift-numerics'.

The error indicates 'Type of expression is ambiguous without more context' in 2 locations in ApproximateEquality.swift of RealModule, where both imply something wrong like ' .\magnitude' as below.

public func isApproximatelyEqual(
    to other: Self,
    relativeTolerance: Magnitude = Magnitude.ulpOfOne.squareRoot(),
    norm: (Self) -> Magnitude = \.magnitude
  ) -> Bool

and

public func isApproximatelyEqual(
    to other: Self,
    absoluteTolerance: Magnitude,
    relativeTolerance: Magnitude = 0
  ) -> Bool {
    self.isApproximatelyEqual(
      to: other,
      absoluteTolerance: absoluteTolerance,
      relativeTolerance: relativeTolerance,
      norm: \.magnitude
    )
  }

Xcode: 11.3.1
Swift: 5

2

I suggest reporting that problem to the author of the Chart library. There's not much we can do here without more information.

3

I've seen the error before, it's your Swift version, try compiling it with 5.4 or 5.5. The Swift 5.0 compiler does not like swift-numerics.