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zeekayandHanzo Dev
4be00f32ab
Modules declare go 1.27.1 and the build images follow. go fix applied the modernizers: any, reflect.TypeFor, the atomic types, WaitGroup.Go, the reflect field iterators, CutPrefix, SplitSeq, strings.Builder and range over int. omitzero is not applied, since it changes what the JSON says. Co-authored-by: Hanzo Dev <[email protected]>
64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
// Package reflect provides reflection utilities for struct manipulation.
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package reflect
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import (
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"fmt"
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"reflect"
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)
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// IsPtrSlice returns true if v is a pointer to a slice.
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func IsPtrSlice(v reflect.Value) bool {
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if v.Kind() != reflect.Pointer {
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return false
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}
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v = v.Elem()
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return v.Kind() == reflect.Slice
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}
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// IsSliceOfPtr returns true if the slice contains pointers.
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func IsSliceOfPtr(slice reflect.Value) bool {
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v := slice.Index(0)
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return v.Type().Kind() == reflect.Pointer
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}
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// SetField sets a field on an addressable struct by name.
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func SetField(ps reflect.Value, name string, value any) error {
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s := ps.Elem()
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f := s.FieldByName(name)
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if !f.IsValid() || !f.CanSet() {
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return fmt.Errorf("not addressable: %v", ps)
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}
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f.Set(reflect.ValueOf(value))
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return nil
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}
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// FieldNames returns all field names of a struct.
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func FieldNames(s any) []string {
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typ := reflect.ValueOf(s).Type()
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num := typ.NumField()
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names := make([]string, num)
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for i := range num {
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names[i] = typ.Field(i).Name
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}
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return names
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}
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// IsZero returns true if the value is the zero value for its type.
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func IsZero(v reflect.Value) bool {
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switch v.Kind() {
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case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
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return v.Len() == 0
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case reflect.Bool:
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return !v.Bool()
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return v.Int() == 0
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
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return v.Uint() == 0
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case reflect.Float32, reflect.Float64:
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return v.Float() == 0
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case reflect.Interface, reflect.Pointer:
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return v.IsNil()
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}
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return false
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}
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