public static LithpPrimitive Call(LithpList parameters, LithpOpChain state, LithpInterpreter interp) { LithpPrimitive def = parameters[0]; LithpList defParams = (LithpList)Tail(LithpList.New(parameters), state, interp); switch (def.LithpType()) { case LithpType.FN_NATIVE: return(((LithpFunctionDefinitionNative)def).Invoke(defParams, state, interp)); case LithpType.FN: return(((LithpFunctionDefinition)def).Invoke(defParams, state, interp)); case LithpType.ATOM: case LithpType.STRING: string strName = def.ToString(); ILithpFunctionDefinition search; if ((object)state.Closure.TopMost != null && state.Closure.TopMost.IsDefined(strName)) { search = (ILithpFunctionDefinition)state.Closure.TopMost[strName]; } else if (state.Closure.IsDefined(strName)) { search = (ILithpFunctionDefinition)state.Closure[strName]; } else { string arityStar = strName + "/*"; if ((object)state.Closure.TopMost != null && state.Closure.TopMost.IsDefined(arityStar)) { search = (ILithpFunctionDefinition)state.Closure.TopMost[arityStar]; } else if (state.Closure.IsDefined(arityStar)) { search = (ILithpFunctionDefinition)state.Closure[arityStar]; } else { throw new MissingMethodException(); } } return(search.Invoke(defParams, state, interp)); default: throw new NotImplementedException(); } }
static void RunTests() { LithpOpChain chain = new LithpOpChain(); LithpInteger one = 1; LithpAtom test = "test"; LithpDict dict = new LithpDict(); dict["foo"] = "bar"; dict["num"] = 1; dict["list"] = LithpList.New("Hello, world!", one, test); Console.WriteLine(dict.ToLiteral()); LithpFunctionCall fncall = LithpFunctionCall.New("print/*", dict); Console.WriteLine("fncall tostring: {0}", fncall); LithpBuiltins builtins = new LithpBuiltins(); LithpInterpreter interp = new LithpInterpreter(); builtins[fncall.Function].Invoke(fncall.Parameters, chain, interp); // Now put it all together chain.Add(fncall); chain.ImportBuiltins(builtins); Console.WriteLine("Result of print: {0}", interp.Run(chain)); // More complex LithpFunctionCall addStrings = LithpFunctionCall.New("+/*", "foo", "bar"); LithpFunctionCall printAddString = LithpFunctionCall.New("print/*", "Adding two strings: ", addStrings); chain.Add(printAddString); interp.Run(chain); chain.Add(addStrings); Console.WriteLine("Result of add strings: {0}", interp.Run(chain)); LithpFunctionCall setVar = LithpFunctionCall.New("set/2", new LithpVariableReference("Test"), "Foo"); LithpFunctionCall printVar = LithpFunctionCall.New("print/*", "Value of Test:", LithpFunctionCall.New( "get/1", new LithpVariableReference("Test") )); chain.Add(setVar); chain.Add(printVar); // Now run entire chain from the start chain.Rewind(); interp.Run(chain); // Try a user-defined function LithpOpChain addBody = new LithpOpChain(chain); addBody.Add(LithpFunctionCall.New( LithpAtom.Atom("+/*"), LithpFunctionCall.New("get/1", new LithpVariableReference("A")), LithpFunctionCall.New("get/1", new LithpVariableReference("B")) )); chain.Add(LithpFunctionCall.New("def/2", LithpAtom.Atom("add"), LithpFunctionDefinition.New(chain, "add", addBody, "A", "B") )); chain.Add(LithpFunctionCall.New("print/*", "Calling user function add:", LithpFunctionCall.New( "add/2", 2, 5 ) )); interp.Run(chain); }