September 2017 Update

Task/Function-prototype/Zkl/function-prototype.zkl

@@ -0,0 +1,24 @@
+fcn{"Hello World"}   // no expected args
+fcn(){"Hello World"} // ditto
+
+fcn{vm.arglist}(1,2)   // ask the VM for the passed in args -->L(1,2)
+fcn f(a,b){a+b}  // fcn(1,2,3) works just fine
+fcn f(args){}(1,2,3)  //args = 1
+fcn(args){vm.arglist.sum()}(1,2,3) //-->6
+
+fcn(a=1,b=2){vm.arglist}()  //-->L(1,2)
+fcn(a=1,b=2){vm.arglist}(5) //-->L(5,2)
+fcn(a=1,b){vm.arglist}()    //-->L(1), error if you try to use b
+fcn(a,b=2){vm.arglist}(5)   //-->L(5,2)
+fcn(a,b=2,c){vm.arglist}(1) //-->L(1,2)
+
+fcn(){vm.nthArg(1)}(5,6)           //-->6
+fcn{vm.numArgs}(1,2,3,4,5,6,7,8,9) //-->9
+fcn{vm.argsMatch(...)}   // a somewhat feeble attempt arg pattern matching based on type (vs value)
+
+   // you can do list assignment in the prototype:
+fcn(a,[(b,c)],d){vm.arglist}(1,L(2,3,4),5) //-->L(1,L(2,3,4),5)
+fcn(a,[(b,c)],d){"%s,%s,%s,%s".fmt(a,b,c,d)}(1,L(2,3,4),5) //-->1,2,3,5
+
+   // no type enforcement but you can give a hint to the compiler
+fcn([Int]n){n.sin()} //--> syntax error as Ints don't do sin