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Functions

For Fabl types <O>,<I₀,>,<I₁,>...<I_n>,

Function(<O>,<I₀,>,<I₁,>...<I_n>)

is the type of all functions that take inputs of types <I₀,>,<I₁,>...<I_n> and return values of type <O>. For example, the type of

string function example(string seed,int a) 
{ 
return "{seed}_{a}";
}

is

Function(string,string,int)

One common use of function types is forward declarations:

var Function(int,int) factorial;

int function factorial(int n)
{
  if (n <= 1) return 1;
  return n * factorial(n-1);
}

Fabl functions are first-class objects which can be passed as arguments to other functions, and can appear as the values of properties. Details appear in a later section.