way better lex function

func_table.go

@@ -0,0 +1,54 @@
+package shsh
+
+type Operation func(*Token) *Token
+
+type Function struct {
+    function Operation
+    timesCalled int
+    args   int
+}
+
+type FuncTable map[string]*Function
+
+var (
+    GlobalFuncTable *FuncTable
+)
+
+// TODO: Currently only checks arg list length
+func ParseFunction(target *Function, args *Token) bool {
+    // HANDLE EXEC
+    if target.args < 0 {
+        return true
+    }
+
+    i := target.args
+    for iter := &args; *iter != nil; iter = &((*iter).next) {
+        i -= 1
+    }
+
+    if i != 0 {
+        // log error here?
+        return false
+    }
+
+    return true
+}
+
+func CallFunction(target *Function, args *Token) *Token {
+    if !ParseFunction(target, args) {
+        return args
+    }
+
+    target.timesCalled += 1
+    return target.function(args)
+}
+
+func GetFunction(arg string) *Function {
+    target, ok := (*GlobalFuncTable)[arg]
+    if !ok {
+        // TODO: hook into stdlib exec call
+        ;
+    }
+
+    return target
+}