mirror of
https://github.com/ceph/ceph-csi.git
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e5d9b68d36
Bumps the golang-dependencies group with 1 update: [golang.org/x/crypto](https://github.com/golang/crypto). Updates `golang.org/x/crypto` from 0.16.0 to 0.17.0 - [Commits](https://github.com/golang/crypto/compare/v0.16.0...v0.17.0) --- updated-dependencies: - dependency-name: golang.org/x/crypto dependency-type: direct:production update-type: version-update:semver-minor dependency-group: golang-dependencies ... Signed-off-by: dependabot[bot] <support@github.com>
101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package interpreter
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import (
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"fmt"
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"github.com/google/cel-go/common/functions"
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)
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// Dispatcher resolves function calls to their appropriate overload.
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type Dispatcher interface {
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// Add one or more overloads, returning an error if any Overload has the same Overload#Name.
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Add(overloads ...*functions.Overload) error
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// FindOverload returns an Overload definition matching the provided name.
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FindOverload(overload string) (*functions.Overload, bool)
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// OverloadIds returns the set of all overload identifiers configured for dispatch.
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OverloadIds() []string
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}
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// NewDispatcher returns an empty Dispatcher instance.
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func NewDispatcher() Dispatcher {
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return &defaultDispatcher{
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overloads: make(map[string]*functions.Overload)}
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}
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// ExtendDispatcher returns a Dispatcher which inherits the overloads of its parent, and
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// provides an isolation layer between built-ins and extension functions which is useful
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// for forward compatibility.
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func ExtendDispatcher(parent Dispatcher) Dispatcher {
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return &defaultDispatcher{
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parent: parent,
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overloads: make(map[string]*functions.Overload)}
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}
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// overloadMap helper type for indexing overloads by function name.
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type overloadMap map[string]*functions.Overload
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// defaultDispatcher struct which contains an overload map.
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type defaultDispatcher struct {
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parent Dispatcher
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overloads overloadMap
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}
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// Add implements the Dispatcher.Add interface method.
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func (d *defaultDispatcher) Add(overloads ...*functions.Overload) error {
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for _, o := range overloads {
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// add the overload unless an overload of the same name has already been provided.
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if _, found := d.overloads[o.Operator]; found {
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return fmt.Errorf("overload already exists '%s'", o.Operator)
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}
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// index the overload by function name.
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d.overloads[o.Operator] = o
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}
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return nil
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}
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// FindOverload implements the Dispatcher.FindOverload interface method.
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func (d *defaultDispatcher) FindOverload(overload string) (*functions.Overload, bool) {
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o, found := d.overloads[overload]
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// Attempt to dispatch to an overload defined in the parent.
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if !found && d.parent != nil {
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return d.parent.FindOverload(overload)
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}
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return o, found
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}
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// OverloadIds implements the Dispatcher interface method.
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func (d *defaultDispatcher) OverloadIds() []string {
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i := 0
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overloads := make([]string, len(d.overloads))
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for name := range d.overloads {
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overloads[i] = name
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i++
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}
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if d.parent == nil {
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return overloads
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}
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parentOverloads := d.parent.OverloadIds()
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for _, pName := range parentOverloads {
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if _, found := d.overloads[pName]; !found {
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overloads = append(overloads, pName)
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}
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}
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return overloads
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}
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