func TemplateVars(typ interface{}) template.VarMap {
fin := []reflect.Type{reflect.TypeOf(typ)}
stringOut := []reflect.Type{reflect.TypeOf("")}
stringFuncTyp := reflect.FuncOf(fin, stringOut, false)
varFunc := func(in []reflect.Value) []reflect.Value {
url, _ := updatesURL(in[0])
return []reflect.Value{reflect.ValueOf(url)}
}
boolOut := []reflect.Type{reflect.TypeOf(true)}
boolFuncTyp := reflect.FuncOf(fin, boolOut, false)
enabledFunc := func(in []reflect.Value) []reflect.Value {
url, _ := updatesURL(in[0])
enabled := url != ""
return []reflect.Value{reflect.ValueOf(enabled)}
}
template.AddFunc(&template.Func{
Name: "__gondola_is_live_reload_enabled",
Fn: reflect.MakeFunc(boolFuncTyp, enabledFunc).Interface(),
Traits: template.FuncTraitContext,
})
reasonFunc := func(in []reflect.Value) []reflect.Value {
_, reason := updatesURL(in[0])
return []reflect.Value{reflect.ValueOf(reason)}
}
template.AddFunc(&template.Func{
Name: "__gondola_is_live_reload_disabled_reason",
Fn: reflect.MakeFunc(stringFuncTyp, reasonFunc).Interface(),
Traits: template.FuncTraitContext,
})
return template.VarMap{
"BroadcasterWebsocketUrl": reflect.MakeFunc(stringFuncTyp, varFunc).Interface(),
}
}
// One wraps the given function to require one less argument, passing in the
// given value instead. The value MUST NOT be nil.
//
// BUG(abg): Variadic functions are not supported.
func One(f interface{}, a interface{}) interface{} {
if f == nil {
panic("f is required")
}
if a == nil {
panic("a is required and cannot be nil")
}
fType := reflect.TypeOf(f)
if fType.Kind() != reflect.Func {
panic(fmt.Sprintf("%v (%v) is not a function", f, fType))
}
if fType.IsVariadic() {
panic(fmt.Sprintf("%v (%v) is variadic", f, fType))
}
in := args(fType)
out := returns(fType)
if len(in) == 0 {
panic(fmt.Sprintf("%v (%v) does not accept enough arguments to curry in %v", f, fType, a))
}
fVal := reflect.ValueOf(f)
aVal := reflect.ValueOf(a)
newFType := reflect.FuncOf(in[1:], out, false)
return reflect.MakeFunc(newFType, func(args []reflect.Value) []reflect.Value {
newArgs := make([]reflect.Value, 0, fType.NumIn())
newArgs = append(newArgs, aVal)
newArgs = append(newArgs, args...)
return fVal.Call(newArgs)
}).Interface()
}
func (fi *FieldInfo) validateKeyField() error {
if fi.KeyField == "" {
return nil
}
if fi.ElemType == nil {
return nil
}
if err := validateName(fi.KeyField); err != nil {
return err
}
if fi.ElemType.Kind() != reflect.Struct {
return errors.Errorf("element type %s not supported; must be struct", fi.ElemType)
}
if fi.KeyType.Kind() != reflect.String {
return errors.Errorf("key type %s not supported; must be string", fi.KeyType)
}
elemKeyField, ok := fi.ElemType.FieldByName(fi.KeyField)
if !ok {
return errors.Errorf("%s has no field %q", fi.ElemType, fi.KeyField)
}
if elemKeyField.Type != fi.KeyType {
return errors.Errorf("%s.%s is %s; want %s (from %s)",
fi.ElemType, elemKeyField.Name, elemKeyField.Type, fi.KeyType, fi.Type)
}
getFuncType := reflect.FuncOf([]reflect.Type{fi.ElemType}, []reflect.Type{fi.KeyType}, false)
ptrToElem := reflect.PtrTo(fi.ElemType)
setFuncType := reflect.FuncOf([]reflect.Type{ptrToElem, fi.KeyType}, nil, false)
fi.GetKeyFunc = reflect.MakeFunc(getFuncType, func(in []reflect.Value) []reflect.Value {
return []reflect.Value{in[0].FieldByName(fi.KeyField)}
})
fi.SetKeyFunc = reflect.MakeFunc(setFuncType, func(in []reflect.Value) []reflect.Value {
elem := in[0].Elem()
if !elem.IsValid() {
return nil
}
in[0].Elem().FieldByName(fi.KeyField).Set(in[1])
return nil
})
return nil
}
func (q *quangoMatcher) Match(userPredicate interface{}) (successfulMatch bool, matchErr error) {
typeOfPredicate := reflect.TypeOf(userPredicate)
if typeOfPredicate.Kind() != reflect.Func {
return false, fmt.Errorf("Expected a function, not a %s", typeOfPredicate)
}
cleanedPredicate := userPredicate
if typeOfPredicate.NumOut() == 0 {
predicateValue := reflect.ValueOf(userPredicate)
predicateWrapper := func(args []reflect.Value) (returnVals []reflect.Value) {
returnVals = []reflect.Value{reflect.ValueOf(true)}
defer func() {
err := recover()
if err != nil {
returnVals = []reflect.Value{reflect.ValueOf(false)}
}
}()
predicateValue.Call(args)
return
}
inType := []reflect.Type{}
for i := 0; i < typeOfPredicate.NumIn(); i++ {
inType = append(inType, typeOfPredicate.In(i))
}
predicateType := reflect.FuncOf(inType, []reflect.Type{reflect.TypeOf(true)}, false)
cleanedPredicate = reflect.MakeFunc(predicateType, predicateWrapper).Interface()
}
err := quick.Check(cleanedPredicate, nil)
q.counterexample = "False"
if err != nil {
cerr, ok := err.(*quick.CheckError)
if !ok {
return false, err
}
q.counterexample = fmt.Sprintf("%s", cerr)
return false, nil
}
return true, nil
}
// hand made bullet
func bullet_hm(f interface{}, v interface{}) (ret func(int) error, err error) {
V_ret := reflect.ValueOf(&ret).Elem()
T_fd := reflect.TypeOf(int(0))
V_f := reflect.ValueOf(f)
V_v := reflect.ValueOf(v)
T_exp := reflect.FuncOf([]reflect.Type{T_fd, V_v.Type()}, []reflect.Type{reflect.ValueOf(&err).Elem().Type()}, false)
if V_f.Type() != T_exp {
return nil, &gatlingerror{T_exp, V_f.Type()}
}
V_ret.Set(reflect.MakeFunc(V_ret.Type(), func(v []reflect.Value) []reflect.Value {
return V_f.Call([]reflect.Value{v[0], V_v})
}))
return ret, nil
}
func alwaysReturnNoError(fn reflect.Value) reflect.Value {
var (
ft = fn.Type()
in []reflect.Type
variadic = ft.IsVariadic()
)
for i := 0; i < ft.NumIn(); i++ {
in = append(in, ft.In(i))
}
newFt := reflect.FuncOf(in, []reflect.Type{_typeOfError}, variadic)
return reflect.MakeFunc(newFt, func(args []reflect.Value) []reflect.Value {
fn.Call(args)
return []reflect.Value{reflect.Zero(_typeOfError)}
})
}
func GenerateConstructor(def *py.Class) interface{} {
init := getInit(def.Pointer)
if init == nil {
panic("can't generate constructor: no Init method")
}
initType := reflect.TypeOf(init)
initVal := reflect.ValueOf(init)
constructedType := reflect.TypeOf(def.Pointer)
// [1:] to remove the first arg of Init, which should be the Alloc()ated object
inTypes := InTypes(initType)[1:]
// return types of the constructor are the object + whatever init returns
outTypes := OutTypes(initType)
outTypes = append([]reflect.Type{constructedType}, outTypes...)
constructorType := reflect.FuncOf(inTypes, outTypes, false)
genericNew := func(args []reflect.Value) (results []reflect.Value) {
lock := py.NewLock()
defer lock.Unlock()
pyObj, err := def.Alloc(0)
if err != nil {
// We assume that a failure to allocate a python object is unrecoverable
panic(err)
}
// prepend the constructed object
args = append([]reflect.Value{reflect.ValueOf(pyObj)}, args...)
results = initVal.Call(args)
// prepend the constructed object
results = append([]reflect.Value{reflect.ValueOf(pyObj)}, results...)
return results
}
constructorFn := reflect.MakeFunc(constructorType, genericNew)
return constructorFn.Interface()
}
func TestFuncOf(t *testing.T) {
var k = reflect.TypeOf(0)
var e = reflect.TypeOf("")
assert.Equal(t, "func(int) string", reflect.FuncOf([]reflect.Type{k}, []reflect.Type{e}, false).String())
}
func FuncOf(in, out []reflect.Type, dotdotdot bool) reflect.Type {
return reflect.FuncOf(in, out, dotdotdot)
}