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Thomas Pelletier 692b98560b Support custom IsZero() methods with omitzero tag (#1020)
The omitzero tag now respects custom IsZero() methods on types,
similar to how encoding/json handles this. Previously, only
reflect.Value.IsZero() was used, which ignores user-defined
implementations.

Fixes #1003

Co-authored-by: Claude <noreply@anthropic.com>
2026-01-04 13:58:47 -05:00

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717 B
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package toml
import (
"encoding"
"reflect"
"time"
)
// isZeroer is used to check if a type has a custom IsZero method.
// This allows custom types to define their own zero-value semantics.
type isZeroer interface {
IsZero() bool
}
var (
timeType = reflect.TypeOf((*time.Time)(nil)).Elem()
textMarshalerType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem()
textUnmarshalerType = reflect.TypeOf((*encoding.TextUnmarshaler)(nil)).Elem()
isZeroerType = reflect.TypeOf((*isZeroer)(nil)).Elem()
mapStringInterfaceType = reflect.TypeOf(map[string]interface{}(nil))
sliceInterfaceType = reflect.TypeOf([]interface{}(nil))
stringType = reflect.TypeOf("")
)