/// <summary>
/// Returns the name of the function f <op> g, where f is the current
/// function name, g is the given one, and <op> is a binary operation.
/// </summary>
public FunctionName Compose(string operation, FunctionName rightFunction)
=> new FunctionName(
$"{this.namePattern} {operation} {rightFunction.namePattern}");
/// <summary>
/// Returns the name of the function f(g), where f is the current
/// function name, and g is the given one.
/// </summary>
public FunctionName Compose(FunctionName innerFunction)
=> new FunctionName(
this.namePattern.Replace(
ArgumentPlaceholder,
innerFunction.namePattern));