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object.go
60 lines (49 loc) · 1.09 KB
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object.go
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package pjn
import (
"errors"
)
var (
EmptyObject = produceEmptyObject
)
func produceEmptyObject(buf *Buffer) (err error) {
buf.AppendBytes(emptyObject)
return nil
}
func Object(producer ...Value) Value {
if len(producer) == 0 {
return EmptyObject
}
return func(buf *Buffer) (err error) {
// Write opening bracket
buf.AppendByte(beginObject)
// Value object content
for n, p := range producer {
if n > 0 {
buf.AppendByte(valueSeparator)
}
if err = p(buf); err != nil {
return ObjectProduceFailed(err)
}
}
// Write closing bracket
buf.AppendByte(endObject)
return nil
}
}
func Member(name string, value Value) Value {
if len(name) == 0 {
return produceError(MemberProduceFailed(errors.New("empty member name")))
}
if value == nil {
return produceError(MemberProduceFailed(errors.New("nil member value producer")))
}
return func(buf *Buffer) (err error) {
// Write name and value separator
buf.AppendByte(doubleQuote)
buf.AppendString(name)
buf.AppendByte(doubleQuote)
buf.AppendByte(nameSeparator)
// Write value
return value(buf)
}
}