Function params

dsl/http.go:1191–1213

params returns the mapped attribute containing the path and query params for the given expression if it's either the root, an API server, a service or an endpoint - nil otherwise.

(exp eval.Expression)

// the given expression if it's either the root, an API server, a service or an
// endpoint - nil otherwise.
func params(exp eval.Expression) *expr.MappedAttributeExpr {
	switch e := exp.(type) {
	case *expr.RootExpr:
		if e.API.HTTP.Params == nil {
			e.API.HTTP.Params = expr.NewEmptyMappedAttributeExpr()
		}
		return e.API.HTTP.Params
	case *expr.HTTPServiceExpr:
		if e.Params == nil {
			e.Params = expr.NewEmptyMappedAttributeExpr()
		}
		return e.Params
	case *expr.HTTPEndpointExpr:
		if e.Params == nil {
			e.Params = expr.NewEmptyMappedAttributeExpr()
		}
		return e.Params
	case *expr.MappedAttributeExpr:
		return e
	default:
		return nil
	}
}

// cookieAttribute initialize the current attribute metadata with the details of
// a HTTP cookie attribute for use by the HTTP code generator.