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value.go
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value.go
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package js
import (
"errors"
"fmt"
"math"
)
// Value is the internal representing of a js object
type Value struct {
name string // for debug
value interface{}
ref Ref
}
// String return the string representing of a value
func (v *Value) String() string {
return fmt.Sprintf("%s", v.value)
}
// Name is used for debugging
func (v *Value) Name() string {
return v.name
}
// Bytes return ref as []byte, error will return if type of ref is not Uint8Array
func (v *Value) Bytes() ([]byte, error) {
slice, ok := v.value.([]byte)
if !ok {
return nil, errors.New("not Uint8Array")
}
return slice, nil
}
// predefined values
var (
valueUndefined = &Value{
name: "Undefined",
value: "undefined",
ref: 0,
}
valueNaN = &Value{
name: "NaN",
value: math.NaN(),
ref: ValueNaN,
}
valueZero = &Value{
name: "Zero",
value: 0,
ref: ValueZero,
}
valueNull = &Value{
name: "Null",
value: (*int)(nil),
ref: ValueNull,
}
valueTrue = &Value{
name: "True",
value: true,
ref: ValueTrue,
}
valueFalse = &Value{
name: "False",
value: false,
ref: ValueFalse,
}
)