1use std::ptr;
2
3use crate::{bindgen_prelude::*, check_status, sys, type_of, Error, Result, Status, ValueType};
4
5#[derive(Clone, Copy, Debug, Default, Eq, PartialEq, Ord, PartialOrd)]
6pub struct Null;
7pub type Undefined = ();
8
9impl TypeName for Null {
10 fn type_name() -> &'static str {
11 "null"
12 }
13
14 fn value_type() -> ValueType {
15 ValueType::Null
16 }
17}
18
19impl ValidateNapiValue for Null {}
20
21impl FromNapiValue for Null {
22 unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
23 match type_of!(env, napi_val) {
24 Ok(ValueType::Null) => Ok(Null),
25 _ => Err(Error::new(
26 Status::InvalidArg,
27 reason:"Value is not null".to_owned(),
28 )),
29 }
30 }
31}
32
33impl ToNapiValue for Null {
34 unsafe fn to_napi_value(env: sys::napi_env, _val: Self) -> Result<sys::napi_value> {
35 let mut ret: *mut napi_value__ = ptr::null_mut();
36
37 check_status!(
38 unsafe { sys::napi_get_null(env, &mut ret) },
39 "Failed to create napi null value"
40 )?;
41
42 Ok(ret)
43 }
44}
45
46impl TypeName for Undefined {
47 fn type_name() -> &'static str {
48 "undefined"
49 }
50
51 fn value_type() -> ValueType {
52 ValueType::Undefined
53 }
54}
55
56impl ValidateNapiValue for Undefined {}
57
58impl FromNapiValue for Undefined {
59 unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
60 match type_of!(env, napi_val) {
61 Ok(ValueType::Undefined) => Ok(()),
62 _ => Err(Error::new(
63 Status::InvalidArg,
64 reason:"Value is not undefined".to_owned(),
65 )),
66 }
67 }
68}
69
70impl ToNapiValue for Undefined {
71 unsafe fn to_napi_value(env: sys::napi_env, _val: Self) -> Result<sys::napi_value> {
72 let mut ret: *mut napi_value__ = ptr::null_mut();
73
74 check_status!(
75 unsafe { sys::napi_get_undefined(env, &mut ret) },
76 "Failed to create napi undefined value"
77 )?;
78
79 Ok(ret)
80 }
81}
82