Sourcery template for creating functors from functions

Functor.swift

import XCTestDynamicOverlay

{% for func in functions %}
public struct {% for text in func.name|split:"(" %}{% if forloop.first %}{{ text|upperFirstLetter }}{% endif %}{% endfor %} {
  public var run: ({% for param in func.parameters %}{{ param.typeName }}{% ifnot forloop.last %}, {% endif %}{% endfor %}){% if func.throws %} throws{% endif %} -> {{ func.returnTypeName }}

  public func callAsFunction({% if func.parameters.count > 0 %}
    {% for param in func.parameters %}
    {{ param.asSource }}{% ifnot forloop.last %},{% endif %}
    {% endfor %}
  {% endif %}){% if func.throws %} throws{% endif %} -> {{ func.returnTypeName }} {
    {% if func.throws %}try {% endif %}run({% for param in func.parameters %}{{ param.name }}{% ifnot forloop.last %}, {% endif %}{% endfor %})
  }
}

extension {% for text in func.name|split:"(" %}{% if forloop.first %}{{ text|upperFirstLetter }}{% endif %}{% endfor %} {
  public static func live() -> {% for text in func.name|split:"(" %}{% if forloop.first %}{{ text|upperFirstLetter }}{% endif %}{% endfor %} {
    {% for text in func.name|split:"(" %}{% if forloop.first %}{{ text|upperFirstLetter }}{% endif %}{% endfor %} { {% if func.parameters %}{% for arg in func.parameters %}{{ arg.name }}{% ifnot forloop.last %}, {% endif %}{% endfor %} in{% endif %}
      // TODO: live implementation
    }
  }
}

extension {% for text in func.name|split:"(" %}{% if forloop.first %}{{ text|upperFirstLetter }}{% endif %}{% endfor %} {
  public static let unimplemented = {% for text in func.name|split:"(" %}{% if forloop.first %}{{ text|capitalize }}{% endif %}{% endfor %}(
    run: XCTUnimplemented("\(Self.self)")
  )
}
{% endfor %}