napi/bindgen_runtime/js_values/
either.rs

1use super::{FromNapiValue, ToNapiValue, TypeName, ValidateNapiValue};
2use crate::{
3  bindgen_runtime::{Null, Undefined, Unknown},
4  check_status, sys, Error, JsValue, Status, ValueType,
5};
6
7impl<T> From<Option<T>> for Either<T, Undefined> {
8  fn from(value: Option<T>) -> Self {
9    match value {
10      Some(v) => Either::A(v),
11      None => Either::B(()),
12    }
13  }
14}
15
16impl<T> From<Either<T, Null>> for Option<T> {
17  fn from(value: Either<T, Null>) -> Option<T> {
18    match value {
19      Either::A(v) => Some(v),
20      Either::B(_) => None,
21    }
22  }
23}
24
25macro_rules! either_n {
26  ( $either_name:ident, $( $parameter:ident ),+ $( , )* ) => {
27    #[derive(Debug, Clone, Copy)]
28    pub enum $either_name< $( $parameter ),+ > {
29      $( $parameter ( $parameter ) ),+
30    }
31
32    impl< $( $parameter ),+ > TypeName for $either_name < $( $parameter ),+ >
33      where $( $parameter: TypeName ),+
34    {
35      fn type_name() -> &'static str {
36        stringify!( $either_name )
37      }
38
39      fn value_type() -> ValueType {
40        ValueType::Unknown
41      }
42    }
43
44    impl< $( $parameter ),+ > FromNapiValue for $either_name < $( $parameter ),+ >
45      where $( $parameter: TypeName + FromNapiValue + ValidateNapiValue ),+
46    {
47      unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> crate::Result<Self> {
48        let mut ret = Err(Error::new(Status::InvalidArg, "Invalid value".to_owned()));
49        $(
50          if unsafe {
51            match $parameter::validate(env, napi_val) {
52              Ok(maybe_rejected_promise) => {
53                if maybe_rejected_promise.is_null() {
54                  true
55                } else {
56                  silence_rejected_promise(env, maybe_rejected_promise)?;
57                  false
58                }
59              },
60              Err(_) => false
61            }
62          } && unsafe { { ret = $parameter ::from_napi_value(env, napi_val).map(Self:: $parameter ); ret.is_ok() } } {
63            ret
64          } else
65        )+
66        {
67          Err(crate::Error::new(
68            Status::InvalidArg,
69            format!(
70              concat!("Value is non of these types ", $( "`{", stringify!( $parameter ), "}`, " ),+ ),
71              $( $parameter = $parameter::type_name(), )+
72            ),
73          ))
74        }
75      }
76    }
77
78    impl< $( $parameter ),+ > ToNapiValue for $either_name < $( $parameter ),+ >
79      where $( $parameter: ToNapiValue ),+
80    {
81      unsafe fn to_napi_value(
82        env: sys::napi_env,
83        value: Self
84      ) -> crate::Result<crate::sys::napi_value> {
85        match value {
86          $( Self:: $parameter (v) => unsafe { $parameter ::to_napi_value(env, v) } ),+
87        }
88      }
89    }
90
91    impl< $( $parameter ),+ > ValidateNapiValue for $either_name < $( $parameter ),+ >
92      where $( $parameter: ValidateNapiValue ),+
93    {
94      unsafe fn validate(
95        env: sys::napi_env,
96        napi_val: sys::napi_value,
97      ) -> crate::Result<sys::napi_value> {
98        let mut ret: crate::Result<sys::napi_value>;
99        $(
100          if unsafe {
101            ret = $parameter::validate(env, napi_val);
102            if let Ok(maybe_rejected_promise) = ret.as_ref() {
103              if maybe_rejected_promise.is_null() {
104                true
105              } else {
106                silence_rejected_promise(env, *maybe_rejected_promise)?;
107                false
108              }
109            } else {
110              false
111            }
112          } {
113            ret
114          } else
115        )+
116        {
117          ret
118        }
119      }
120    }
121
122    impl<Data, $( $parameter: AsRef<Data> ),+ > AsRef<Data> for $either_name < $( $parameter ),+ >
123      where Data: ?Sized,
124    {
125      fn as_ref(&self) -> &Data {
126        match &self {
127          $( Self:: $parameter (v) => v.as_ref() ),+
128        }
129      }
130    }
131
132    impl<'env, $( $parameter ),+ > $either_name < $( $parameter ),+ >
133      where $( $parameter: JsValue<'env> ),+
134    {
135      pub fn as_unknown(&self) -> Unknown<'env> {
136        match &self {
137          $( Self:: $parameter (v) => v.to_unknown() ),+
138        }
139      }
140    }
141
142    #[cfg(feature = "serde-json")]
143    impl< $( $parameter: serde::Serialize ),+ > serde::Serialize for $either_name< $( $parameter ),+ > {
144      fn serialize<Ser>(&self, serializer: Ser) -> Result<Ser::Ok, Ser::Error>
145      where
146        Ser: serde::Serializer
147      {
148        match &self {
149          $( Self:: $parameter (v) => serializer.serialize_some(v) ),+
150        }
151      }
152    }
153  };
154}
155
156either_n!(Either, A, B);
157either_n!(Either3, A, B, C);
158either_n!(Either4, A, B, C, D);
159either_n!(Either5, A, B, C, D, E);
160either_n!(Either6, A, B, C, D, E, F);
161either_n!(Either7, A, B, C, D, E, F, G);
162either_n!(Either8, A, B, C, D, E, F, G, H);
163either_n!(Either9, A, B, C, D, E, F, G, H, I);
164either_n!(Either10, A, B, C, D, E, F, G, H, I, J);
165either_n!(Either11, A, B, C, D, E, F, G, H, I, J, K);
166either_n!(Either12, A, B, C, D, E, F, G, H, I, J, K, L);
167either_n!(Either13, A, B, C, D, E, F, G, H, I, J, K, L, M);
168either_n!(Either14, A, B, C, D, E, F, G, H, I, J, K, L, M, N);
169either_n!(Either15, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O);
170either_n!(Either16, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P);
171either_n!(Either17, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q);
172either_n!(Either18, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R);
173either_n!(Either19, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S);
174either_n!(Either20, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T);
175either_n!(Either21, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U);
176either_n!(Either22, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V);
177either_n!(Either23, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W);
178either_n!(Either24, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X);
179either_n!(Either25, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y);
180either_n!(Either26, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z);
181
182fn silence_rejected_promise(env: sys::napi_env, promise: sys::napi_value) -> crate::Result<()> {
183  let mut catch_method = std::ptr::null_mut();
184  check_status!(unsafe {
185    sys::napi_get_named_property(env, promise, c"catch".as_ptr().cast(), &mut catch_method)
186  })?;
187  let mut catch_noop_callback = std::ptr::null_mut();
188  check_status!(unsafe {
189    sys::napi_create_function(
190      env,
191      c"catch".as_ptr().cast(),
192      5,
193      Some(noop),
194      std::ptr::null_mut(),
195      &mut catch_noop_callback,
196    )
197  })?;
198  check_status!(unsafe {
199    sys::napi_call_function(
200      env,
201      promise,
202      catch_method,
203      1,
204      vec![catch_noop_callback].as_ptr().cast(),
205      std::ptr::null_mut(),
206    )
207  })?;
208  Ok(())
209}
210
211unsafe extern "C" fn noop(_env: sys::napi_env, _info: sys::napi_callback_info) -> sys::napi_value {
212  std::ptr::null_mut()
213}
napi/bindgen_runtime/js_values/either.rs

napi/bindgen_runtime/js_values/
either.rs
