Golang dslengine.ReportError函数代码示例

// Store represents a database.  Gorma lets you specify
// a database type, but it's currently not used for any generation
// logic.
func Store(name string, storeType gorma.RelationalStorageType, dsl func()) {
	if name == "" || len(name) == 0 {
		dslengine.ReportError("Relational Store requires a name.")
		return
	}
	if len(storeType) == 0 {
		dslengine.ReportError("Relational Store requires a RelationalStoreType.")
		return
	}
	if dsl == nil {
		dslengine.ReportError("Relational Store requires a dsl.")
		return
	}
	if s, ok := storageGroupDefinition(true); ok {
		if s.RelationalStores == nil {
			s.RelationalStores = make(map[string]*gorma.RelationalStoreDefinition)
		}
		store, ok := s.RelationalStores[name]
		if !ok {
			store = &gorma.RelationalStoreDefinition{
				Name:             name,
				DefinitionDSL:    dsl,
				Parent:           s,
				Type:             storeType,
				RelationalModels: make(map[string]*gorma.RelationalModelDefinition),
			}
		} else {
			dslengine.ReportError("Relational Store %s can only be declared once.", name)
		}
		s.RelationalStores[name] = store
	}

}

func executeResponseDSL(name string, paramsAndDSL ...interface{}) *design.ResponseDefinition {
	var params []string
	var dsl func()
	var ok bool
	var dt design.DataType
	if len(paramsAndDSL) > 0 {
		d := paramsAndDSL[len(paramsAndDSL)-1]
		if dsl, ok = d.(func()); ok {
			paramsAndDSL = paramsAndDSL[:len(paramsAndDSL)-1]
		}
		if len(paramsAndDSL) > 0 {
			t := paramsAndDSL[0]
			if dt, ok = t.(design.DataType); ok {
				paramsAndDSL = paramsAndDSL[1:]
			}
		}
		params = make([]string, len(paramsAndDSL))
		for i, p := range paramsAndDSL {
			params[i], ok = p.(string)
			if !ok {
				dslengine.ReportError("invalid response template parameter %#v, must be a string", p)
				return nil
			}
		}
	}
	var resp *design.ResponseDefinition
	if len(params) > 0 {
		if tmpl, ok := design.Design.ResponseTemplates[name]; ok {
			resp = tmpl.Template(params...)
		} else if tmpl, ok := design.Design.DefaultResponseTemplates[name]; ok {
			resp = tmpl.Template(params...)
		} else {
			dslengine.ReportError("no response template named %#v", name)
			return nil
		}
	} else {
		if ar, ok := design.Design.Responses[name]; ok {
			resp = ar.Dup()
		} else if ar, ok := design.Design.DefaultResponses[name]; ok {
			resp = ar.Dup()
			resp.Standard = true
		} else {
			resp = &design.ResponseDefinition{Name: name}
		}
	}
	if dsl != nil {
		if !dslengine.Execute(dsl, resp) {
			return nil
		}
		resp.Standard = false
	}
	if dt != nil {
		if mt, ok := dt.(*design.MediaTypeDefinition); ok {
			resp.MediaType = mt.Identifier
		}
		resp.Type = dt
		resp.Standard = false
	}
	return resp
}

// Trait defines an API trait. A trait encapsulates arbitrary DSL that gets executed wherever the
// trait is called via the UseTrait function.
func Trait(name string, val ...func()) {
	var ver *design.APIVersionDefinition
	if a, ok := apiDefinition(false); ok {
		ver = a.APIVersionDefinition
	} else if v, ok := versionDefinition(true); ok {
		ver = v
	}
	if len(val) < 1 {
		dslengine.ReportError("missing trait DSL for %s", name)
		return
	} else if len(val) > 1 {
		dslengine.ReportError("too many arguments given to Trait")
		return
	}
	if ver == nil {
		return
	}
	if _, ok := ver.Traits[name]; ok {
		dslengine.ReportError("multiple definitions for trait %s%s", name, ver.Context())
		return
	}
	trait := &dslengine.TraitDefinition{Name: name, DSLFunc: val[0]}
	if ver.Traits == nil {
		ver.Traits = make(map[string]*dslengine.TraitDefinition)
	}
	ver.Traits[name] = trait
}

// Response implements the response definition DSL. Response takes the name of the response as
// first parameter. goa defines all the standard HTTP status name as global variables so they can be
// readily used as response names. Response also accepts optional arguments that correspond to the
// arguments defined by the corresponding response template (the response template with the same
// name) if there is one, see ResponseTemplate.
//
// A response may also optionally use an anonymous function as last argument to specify the response
// status code, media type and headers overriding what the default response or response template
// specifies:
//
//	Response(OK, "vnd.goa.bottle", func() {	// OK response template accepts one argument: the media type identifier
//		Headers(func() {		// Headers list the response HTTP headers, see Headers
//			Header("X-Request-Id")
//		})
//	})
//
//	Response(NotFound, func() {
//		Status(404)			// Not necessary as defined by default NotFound response.
//		Media("application/json")	// Override NotFound response default of "text/plain"
//	})
//
//	Response(Created, func() {
//		Media(BottleMedia)
//	})
//
// goa defines a default response for all the HTTP status code. The default response simply sets
// the status code. So if an action can return NotFound for example all it has to do is specify
// Response(NotFound) - there is no need to specify the status code as the default response already
// does it, in other words:
//
//	Response(NotFound)
//
// is equivalent to:
//
//	Response(NotFound, func() {
//		Status(404)
//	})
//
// goa also defines a default response template for the OK response which takes a single argument:
// the identifier of the media type used to render the response. The API DSL can define additional
// response templates or override the default OK response template using ResponseTemplate.
//
// The media type identifier specified in a response definition via the Media function can be
// "generic" such as "text/plain" or "application/json" or can correspond to the identifier of a
// media type defined in the API DSL. In this latter case goa uses the media type definition to
// generate helper response methods. These methods know how to render the views defined on the media
// type and run the validations defined in the media type during rendering.
func Response(name string, paramsAndDSL ...interface{}) {
	if a, ok := actionDefinition(false); ok {
		if a.Responses == nil {
			a.Responses = make(map[string]*design.ResponseDefinition)
		}
		if _, ok := a.Responses[name]; ok {
			dslengine.ReportError("response %s is defined twice", name)
			return
		}
		if resp := executeResponseDSL(name, paramsAndDSL...); resp != nil {
			if resp.Status == 200 && resp.MediaType == "" {
				resp.MediaType = a.Parent.MediaType
			}
			resp.Parent = a
			a.Responses[name] = resp
		}
	} else if r, ok := resourceDefinition(true); ok {
		if r.Responses == nil {
			r.Responses = make(map[string]*design.ResponseDefinition)
		}
		if _, ok := r.Responses[name]; ok {
			dslengine.ReportError("response %s is defined twice", name)
			return
		}
		if resp := executeResponseDSL(name, paramsAndDSL...); resp != nil {
			if resp.Status == 200 && resp.MediaType == "" {
				resp.MediaType = r.MediaType
			}
			resp.Parent = r
			r.Responses[name] = resp
		}
	}
}

// buildEncodingDefinition builds up an encoding definition.
func buildEncodingDefinition(encoding bool, args ...interface{}) *design.EncodingDefinition {
	var dsl func()
	var ok bool
	funcName := "Consumes"
	if encoding {
		funcName = "Produces"
	}
	if len(args) == 0 {
		dslengine.ReportError("missing argument in call to %s", funcName)
		return nil
	}
	if _, ok = args[0].(string); !ok {
		dslengine.ReportError("first argument to %s must be a string (MIME type)", funcName)
		return nil
	}
	last := len(args)
	if dsl, ok = args[len(args)-1].(func()); ok {
		last = len(args) - 1
	}
	mimeTypes := make([]string, last)
	for i := 0; i < last; i++ {
		var mimeType string
		if mimeType, ok = args[i].(string); !ok {
			dslengine.ReportError("argument #%d of %s must be a string (MIME type)", i, funcName)
			return nil
		}
		mimeTypes[i] = mimeType
	}
	d := &design.EncodingDefinition{MIMETypes: mimeTypes, Encoder: encoding}
	if dsl != nil {
		dslengine.Execute(dsl, d)
	}
	return d
}

// ResponseTemplate defines a response template that action definitions can use to describe their
// responses. The template may specify the HTTP response status, header specification and body media
// type. The template consists of a name and an anonymous function. The function is called when an
// action uses the template to define a response. Response template functions accept string
// parameters they can use to define the response fields. Here is an example of a response template
// definition that uses a function with one argument corresponding to the name of the response body
// media type:
//
//	ResponseTemplate(OK, func(mt string) {
//		Status(200)				// OK response uses status code 200
//		Media(mt)				// Media type name set by action definition
//		Headers(func() {
//			Header("X-Request-Id", func() {	// X-Request-Id header contains a string
//				Pattern("[0-9A-F]+")	// Regexp used to validate the response header content
//			})
//			Required("X-Request-Id")	// Header is mandatory
//		})
//	})
//
// This template can the be used by actions to define the OK response as follows:
//
//	Response(OK, "vnd.goa.example")
//
// goa comes with a set of predefined response templates (one per standard HTTP status code). The
// OK template is the only one that accepts an argument. It is used as shown in the example above to
// set the response media type. Other predefined templates do not use arguments. ResponseTemplate
// makes it possible to define additional response templates specific to the API.
func ResponseTemplate(name string, p interface{}) {
	var v *design.APIVersionDefinition
	if a, ok := apiDefinition(false); ok {
		v = a.APIVersionDefinition
	} else if ver, ok := versionDefinition(true); ok {
		v = ver
	}
	if v == nil {
		return
	}
	if v.Responses == nil {
		v.Responses = make(map[string]*design.ResponseDefinition)
	}
	if v.ResponseTemplates == nil {
		v.ResponseTemplates = make(map[string]*design.ResponseTemplateDefinition)
	}
	if _, ok := v.Responses[name]; ok {
		dslengine.ReportError("multiple definitions for response template %s", name)
		return
	}
	if _, ok := v.ResponseTemplates[name]; ok {
		dslengine.ReportError("multiple definitions for response template %s", name)
		return
	}

	setupResponseTemplate(v, name, p)
}

// Headers implements the DSL for describing HTTP headers. The DSL syntax is identical to the one
// of Attribute. Here is an example defining a couple of headers with validations:
//
//	Headers(func() {
//		Header("Authorization")
//		Header("X-Account", Integer, func() {
//			Minimum(1)
//		})
//		Required("Authorization")
//	})
//
// Headers can be used inside Action to define the action request headers, Response to define the
// response headers or Resource to define common request headers to all the resource actions.
func Headers(dsl func()) {
	if a, ok := actionDefinition(false); ok {
		headers := newAttribute(a.Parent.MediaType)
		if dslengine.Execute(dsl, headers) {
			a.Headers = headers
		}
	} else if r, ok := resourceDefinition(false); ok {
		headers := newAttribute(r.MediaType)
		if dslengine.Execute(dsl, headers) {
			r.Headers = headers
		}
	} else if r, ok := responseDefinition(true); ok {
		if r.Headers != nil {
			dslengine.ReportError("headers already defined")
			return
		}
		var h *design.AttributeDefinition
		switch actual := r.Parent.(type) {
		case *design.ResourceDefinition:
			h = newAttribute(actual.MediaType)
		case *design.ActionDefinition:
			h = newAttribute(actual.Parent.MediaType)
		case nil: // API ResponseTemplate
			h = &design.AttributeDefinition{}
		default:
			dslengine.ReportError("invalid use of Response or ResponseTemplate")
		}
		if dslengine.Execute(dsl, h) {
			r.Headers = h
		}
	}
}

// View adds a new view to a media type. A view has a name and lists attributes that are
// rendered when the view is used to produce a response. The attribute names must appear in the
// media type definition. If an attribute is itself a media type then the view may specify which
// view to use when rendering the attribute using the View function in the View dsl. If not
// specified then the view named "default" is used. Examples:
//
//	View("default", func() {
//		Attribute("id")		// "id" and "name" must be media type attributes
//		Attribute("name")
//	})
//
//	View("extended", func() {
//		Attribute("id")
//		Attribute("name")
//		Attribute("origin", func() {
//			View("extended")	// Use view "extended" to render attribute "origin"
//		})
//	})
func View(name string, dsl ...func()) {
	if mt, ok := mediaTypeDefinition(false); ok {
		if !mt.Type.IsObject() && !mt.Type.IsArray() {
			dslengine.ReportError("cannot define view on non object and non collection media types")
			return
		}
		if mt.Views == nil {
			mt.Views = make(map[string]*design.ViewDefinition)
		} else {
			if _, ok = mt.Views[name]; ok {
				dslengine.ReportError("multiple definitions for view %#v in media type %#v", name, mt.TypeName)
				return
			}
		}
		at := &design.AttributeDefinition{}
		ok := false
		if len(dsl) > 0 {
			ok = dslengine.Execute(dsl[0], at)
		} else if mt.Type.IsArray() {
			// inherit view from collection element if present
			elem := mt.Type.ToArray().ElemType
			if elem != nil {
				if pa, ok2 := elem.Type.(*design.MediaTypeDefinition); ok2 {
					if v, ok2 := pa.Views[name]; ok2 {
						at = v.AttributeDefinition
						ok = true
					} else {
						dslengine.ReportError("unknown view %#v", name)
						return
					}
				}
			}
		}
		if ok {
			o := at.Type.ToObject()
			if o != nil {
				mto := mt.Type.ToObject()
				if mto == nil {
					mto = mt.Type.ToArray().ElemType.Type.ToObject()
				}
				for n, cat := range o {
					if existing, ok := mto[n]; ok {
						dup := existing.Dup()
						dup.View = cat.View
						o[n] = dup
					} else if n != "links" {
						dslengine.ReportError("unknown attribute %#v", n)
					}
				}
			}
			mt.Views[name] = &design.ViewDefinition{
				AttributeDefinition: at,
				Name:                name,
				Parent:              mt,
			}
		}
	} else if a, ok := attributeDefinition(true); ok {
		a.View = name
	}
}

// ArrayOf creates an array type from its element type. The result can be used anywhere a type can.
// Examples:
//
//	var Bottle = Type("bottle", func() {
//		Attribute("name")
//	})
//
//	var Bottles = ArrayOf(Bottle)
//
//	Action("update", func() {
//		Params(func() {
//			Param("ids", ArrayOf(Integer))
//		})
//		Payload(ArrayOf(Bottle))  // Equivalent to Payload(Bottles)
//	})
//
// ArrayOf accepts an optional DSL as second argument which allows providing validations for the
// elements of the array:
//
//      var Names = ArrayOf(String, func() {
//          Pattern("[a-zA-Z]+")
//      })
//
// If you are looking to return a collection of elements in a Response clause, refer to
// CollectionOf.  ArrayOf creates a type, where CollectionOf creates a media type.
func ArrayOf(v interface{}, dsl ...func()) *design.Array {
	var t design.DataType
	var ok bool
	t, ok = v.(design.DataType)
	if !ok {
		if name, ok := v.(string); ok {
			t = design.Design.Types[name]
		}
	}
	// never return nil to avoid panics, errors are reported after DSL execution
	res := &design.Array{ElemType: &design.AttributeDefinition{Type: design.String}}
	if t == nil {
		dslengine.ReportError("invalid ArrayOf argument: not a type and not a known user type name")
		return res
	}
	if len(dsl) > 1 {
		dslengine.ReportError("ArrayOf: too many arguments")
		return res
	}
	at := design.AttributeDefinition{Type: t}
	if len(dsl) == 1 {
		dslengine.Execute(dsl[0], &at)
	}
	return &design.Array{ElemType: &at}
}

// Scope defines an authorization scope. Used within SecurityScheme, a description may be provided
// explaining what the scope means. Within a Security block, only a scope is needed.
func Scope(name string, desc ...string) {
	switch current := dslengine.CurrentDefinition().(type) {
	case *design.SecurityDefinition:
		if len(desc) >= 1 {
			dslengine.ReportError("too many arguments")
			return
		}
		current.Scopes = append(current.Scopes, name)
	case *design.SecuritySchemeDefinition:
		if len(desc) > 1 {
			dslengine.ReportError("too many arguments")
			return
		}
		if current.Scopes == nil {
			current.Scopes = make(map[string]string)
		}
		d := "no description"
		if len(desc) == 1 {
			d = desc[0]
		}
		current.Scopes[name] = d
	default:
		dslengine.IncompatibleDSL()
	}
}

// Maximum adds a "maximum" validation to the attribute.
// See http://json-schema.org/latest/json-schema-validation.html#anchor17.
func Maximum(val interface{}) {
	if a, ok := attributeDefinition(); ok {
		if a.Type != nil && a.Type.Kind() != design.IntegerKind && a.Type.Kind() != design.NumberKind {
			incompatibleAttributeType("maximum", a.Type.Name(), "an integer or a number")
		} else {
			var f float64
			switch v := val.(type) {
			case float32, float64, int, int8, int16, int32, int64, uint8, uint16, uint32, uint64:
				f = reflect.ValueOf(v).Convert(reflect.TypeOf(float64(0.0))).Float()
			case string:
				var err error
				f, err = strconv.ParseFloat(v, 64)
				if err != nil {
					dslengine.ReportError("invalid number value %#v", v)
					return
				}
			default:
				dslengine.ReportError("invalid number value %#v", v)
				return
			}
			if a.Validation == nil {
				a.Validation = &dslengine.ValidationDefinition{}
			}
			a.Validation.Maximum = &f
		}
	}
}

// Headers implements the DSL for describing HTTP headers. The DSL syntax is identical to the one
// of Attribute. Here is an example defining a couple of headers with validations:
//
//	Headers(func() {
//		Header("Authorization")
//		Header("X-Account", Integer, func() {
//			Minimum(1)
//		})
//		Required("Authorization")
//	})
//
// Headers can be used inside Action to define the action request headers, Response to define the
// response headers or Resource to define common request headers to all the resource actions.
func Headers(params ...interface{}) {
	if len(params) == 0 {
		dslengine.ReportError("missing parameter")
		return
	}
	dsl, ok := params[0].(func())
	if ok {
		switch def := dslengine.CurrentDefinition().(type) {
		case *design.ActionDefinition:
			headers := newAttribute(def.Parent.MediaType)
			if dslengine.Execute(dsl, headers) {
				def.Headers = headers
			}

		case *design.ResourceDefinition:
			headers := newAttribute(def.MediaType)
			if dslengine.Execute(dsl, headers) {
				def.Headers = headers
			}

		case *design.ResponseDefinition:
			if def.Headers != nil {
				dslengine.ReportError("headers already defined")
				return
			}
			var h *design.AttributeDefinition
			switch actual := def.Parent.(type) {
			case *design.ResourceDefinition:
				h = newAttribute(actual.MediaType)
			case *design.ActionDefinition:
				h = newAttribute(actual.Parent.MediaType)
			case nil: // API ResponseTemplate
				h = &design.AttributeDefinition{}
			default:
				dslengine.ReportError("invalid use of Response or ResponseTemplate")
			}
			if dslengine.Execute(dsl, h) {
				def.Headers = h
			}

		default:
			dslengine.IncompatibleDSL()
		}
	} else if cors, ok := corsDefinition(); ok {
		vals := make([]string, len(params))
		for i, p := range params {
			if v, ok := p.(string); ok {
				vals[i] = v
			} else {
				dslengine.ReportError("invalid parameter at position %d: must be a string", i)
				return
			}
		}
		cors.Headers = vals
	} else {
		dslengine.IncompatibleDSL()
	}
}

func payload(isOptional bool, p interface{}, dsls ...func()) {
	if len(dsls) > 1 {
		dslengine.ReportError("too many arguments given to Payload")
		return
	}
	if a, ok := actionDefinition(); ok {
		var att *design.AttributeDefinition
		var dsl func()
		switch actual := p.(type) {
		case func():
			dsl = actual
			att = newAttribute(a.Parent.MediaType)
			att.Type = design.Object{}
		case *design.AttributeDefinition:
			att = design.DupAtt(actual)
		case *design.UserTypeDefinition:
			if len(dsls) == 0 {
				a.Payload = actual
				a.PayloadOptional = isOptional
				return
			}
			att = design.DupAtt(actual.Definition())
		case *design.MediaTypeDefinition:
			att = design.DupAtt(actual.AttributeDefinition)
		case string:
			ut, ok := design.Design.Types[actual]
			if !ok {
				dslengine.ReportError("unknown payload type %s", actual)
			}
			att = design.DupAtt(ut.AttributeDefinition)
		case *design.Array:
			att = &design.AttributeDefinition{Type: actual}
		case *design.Hash:
			att = &design.AttributeDefinition{Type: actual}
		case design.Primitive:
			att = &design.AttributeDefinition{Type: actual}
		default:
			dslengine.ReportError("invalid Payload argument, must be a type, a media type or a DSL building a type")
			return
		}
		if len(dsls) == 1 {
			if dsl != nil {
				dslengine.ReportError("invalid arguments in Payload call, must be (type), (dsl) or (type, dsl)")
			}
			dsl = dsls[0]
		}
		if dsl != nil {
			dslengine.Execute(dsl, att)
		}
		rn := camelize(a.Parent.Name)
		an := camelize(a.Name)
		a.Payload = &design.UserTypeDefinition{
			AttributeDefinition: att,
			TypeName:            fmt.Sprintf("%s%sPayload", an, rn),
		}
		a.PayloadOptional = isOptional
	}
}

func setupResponseTemplate(a *design.APIDefinition, name string, p interface{}) {
	if f, ok := p.(func()); ok {
		r := &design.ResponseDefinition{Name: name}
		if dslengine.Execute(f, r) {
			a.Responses[name] = r
		}
	} else if tmpl, ok := p.(func(...string)); ok {
		t := func(params ...string) *design.ResponseDefinition {
			r := &design.ResponseDefinition{Name: name}
			dslengine.Execute(func() { tmpl(params...) }, r)
			return r
		}
		a.ResponseTemplates[name] = &design.ResponseTemplateDefinition{
			Name:     name,
			Template: t,
		}
	} else {
		typ := reflect.TypeOf(p)
		if kind := typ.Kind(); kind != reflect.Func {
			dslengine.ReportError("dsl must be a function but got %s", kind)
			return
		}

		num := typ.NumIn()
		val := reflect.ValueOf(p)
		t := func(params ...string) *design.ResponseDefinition {
			if len(params) < num {
				args := "1 argument"
				if num > 0 {
					args = fmt.Sprintf("%d arguments", num)
				}
				dslengine.ReportError("expected at least %s when invoking response template %s", args, name)
				return nil
			}
			r := &design.ResponseDefinition{Name: name}

			in := make([]reflect.Value, num)
			for i := 0; i < num; i++ {
				// type checking
				if t := typ.In(i); t.Kind() != reflect.String {
					dslengine.ReportError("ResponseTemplate parameters must be strings but type of parameter at position %d is %s", i, t)
					return nil
				}
				// append input arguments
				in[i] = reflect.ValueOf(params[i])
			}
			dslengine.Execute(func() { val.Call(in) }, r)
			return r
		}
		a.ResponseTemplates[name] = &design.ResponseTemplateDefinition{
			Name:     name,
			Template: t,
		}
	}
}

// View adds a new view to a media type. A view has a name and lists attributes that are
// rendered when the view is used to produce a response. The attribute names must appear in the
// media type definition. If an attribute is itself a media type then the view may specify which
// view to use when rendering the attribute using the View function in the View apidsl. If not
// specified then the view named "default" is used. Examples:
//
//	View("default", func() {
//		Attribute("id")		// "id" and "name" must be media type attributes
//		Attribute("name")
//	})
//
//	View("extended", func() {
//		Attribute("id")
//		Attribute("name")
//		Attribute("origin", func() {
//			View("extended")	// Use view "extended" to render attribute "origin"
//		})
//	})
func View(name string, apidsl ...func()) {
	switch def := dslengine.CurrentDefinition().(type) {
	case *design.MediaTypeDefinition:
		mt := def

		if !mt.Type.IsObject() && !mt.Type.IsArray() {
			dslengine.ReportError("cannot define view on non object and non collection media types")
			return
		}
		if mt.Views == nil {
			mt.Views = make(map[string]*design.ViewDefinition)
		} else {
			if _, ok := mt.Views[name]; ok {
				dslengine.ReportError("multiple definitions for view %#v in media type %#v", name, mt.TypeName)
				return
			}
		}
		at := &design.AttributeDefinition{}
		ok := false
		if len(apidsl) > 0 {
			ok = dslengine.Execute(apidsl[0], at)
		} else if mt.Type.IsArray() {
			// inherit view from collection element if present
			elem := mt.Type.ToArray().ElemType
			if elem != nil {
				if pa, ok2 := elem.Type.(*design.MediaTypeDefinition); ok2 {
					if v, ok2 := pa.Views[name]; ok2 {
						at = v.AttributeDefinition
						ok = true
					} else {
						dslengine.ReportError("unknown view %#v", name)
						return
					}
				}
			}
		}
		if ok {
			view, err := buildView(name, mt, at)
			if err != nil {
				dslengine.ReportError(err.Error())
				return
			}
			mt.Views[name] = view
		}

	case *design.AttributeDefinition:
		def.View = name

	default:
		dslengine.IncompatibleDSL()
	}
}