mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-07 20:30:36 -05:00
e1e1baa1bd
* Make throwOnError=true the new default
* Handle JS errors as part of the RPC request/response flow
* Return a new Result type with .Err on it
This enables constructs on the form:
```handlebars
{{ with transform.ToMath "c = \\foo{a^2 + b^2}" }}
{{ with .Err }}
{{ warnf "error: %s" . }}
{{ else }}
{{ . }}
{{ end }}
{{ end }}
```
Note that the new `Result` type behaves like `template.HTML` (or a string if needed) when printed, but it will panic if in a error state.
Closes #12748
146 lines
3.3 KiB
Go
146 lines
3.3 KiB
Go
// Copyright 2019 The Hugo Authors. All rights reserved.
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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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// 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 types contains types shared between packages in Hugo.
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package types
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import (
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"fmt"
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"reflect"
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"sync/atomic"
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"github.com/spf13/cast"
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)
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// RLocker represents the read locks in sync.RWMutex.
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type RLocker interface {
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RLock()
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RUnlock()
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}
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// KeyValue is a interface{} tuple.
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type KeyValue struct {
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Key any
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Value any
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}
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// KeyValueStr is a string tuple.
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type KeyValueStr struct {
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Key string
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Value string
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}
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// KeyValues holds an key and a slice of values.
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type KeyValues struct {
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Key any
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Values []any
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}
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// KeyString returns the key as a string, an empty string if conversion fails.
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func (k KeyValues) KeyString() string {
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return cast.ToString(k.Key)
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}
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func (k KeyValues) String() string {
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return fmt.Sprintf("%v: %v", k.Key, k.Values)
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}
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// NewKeyValuesStrings takes a given key and slice of values and returns a new
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// KeyValues struct.
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func NewKeyValuesStrings(key string, values ...string) KeyValues {
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iv := make([]any, len(values))
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for i := 0; i < len(values); i++ {
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iv[i] = values[i]
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}
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return KeyValues{Key: key, Values: iv}
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}
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// Zeroer, as implemented by time.Time, will be used by the truth template
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// funcs in Hugo (if, with, not, and, or).
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type Zeroer interface {
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IsZero() bool
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}
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// IsNil reports whether v is nil.
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func IsNil(v any) bool {
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if v == nil {
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return true
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}
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value := reflect.ValueOf(v)
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switch value.Kind() {
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case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
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return value.IsNil()
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}
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return false
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}
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// DevMarker is a marker interface for types that should only be used during
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// development.
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type DevMarker interface {
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DevOnly()
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}
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// Unwrapper is implemented by types that can unwrap themselves.
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type Unwrapper interface {
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// Unwrapv is for internal use only.
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// It got its slightly odd name to prevent collisions with user types.
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Unwrapv() any
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}
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// Unwrap returns the underlying value of v if it implements Unwrapper, otherwise v is returned.
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func Unwrapv(v any) any {
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if u, ok := v.(Unwrapper); ok {
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return u.Unwrapv()
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}
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return v
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}
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// LowHigh is typically used to represent a slice boundary.
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type LowHigh struct {
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Low int
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High int
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}
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// This is only used for debugging purposes.
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var InvocationCounter atomic.Int64
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// NewTrue returns a pointer to b.
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func NewBool(b bool) *bool {
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return &b
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}
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// PrintableValueProvider is implemented by types that can provide a printable value.
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type PrintableValueProvider interface {
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PrintableValue() any
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}
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var _ PrintableValueProvider = Result[any]{}
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// Result is a generic result type.
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type Result[T any] struct {
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// The result value.
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Value T
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// The error value.
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Err error
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}
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// PrintableValue returns the value or panics if there is an error.
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func (r Result[T]) PrintableValue() any {
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if r.Err != nil {
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panic(r.Err)
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}
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return r.Value
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}
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