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// Copyright 2016 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tpl
import (
"reflect"
"time"
)
// toInt returns the int value if possible, -1 if not.
func toInt(v reflect.Value) int64 {
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return v.Int()
case reflect.Interface:
return toInt(v.Elem())
}
return -1
}
// toString returns the string value if possible, "" if not.
func toString(v reflect.Value) string {
switch v.Kind() {
case reflect.String:
return v.String()
case reflect.Interface:
return toString(v.Elem())
}
return ""
}
var (
zero reflect.Value
errorType = reflect.TypeOf((*error)(nil)).Elem()
timeType = reflect.TypeOf((*time.Time)(nil)).Elem()
)
func toTimeUnix(v reflect.Value) int64 {
if v.Kind() == reflect.Interface {
return toTimeUnix(v.Elem())
}
if v.Type() != timeType {
panic("coding error: argument must be time.Time type reflect Value")
}
return v.MethodByName("Unix").Call([]reflect.Value{})[0].Int()
}
// indirect is taken from 'text/template/exec.go'
func indirect(v reflect.Value) (rv reflect.Value, isNil bool) {
for ; v.Kind() == reflect.Ptr || v.Kind() == reflect.Interface; v = v.Elem() {
if v.IsNil() {
return v, true
}
if v.Kind() == reflect.Interface && v.NumMethod() > 0 {
break
}
}
return v, false
}
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