2 files changed, 67 insertions, 0 deletions
diff --git a/serde_v8/magic/any_value.rs b/serde_v8/magic/any_value.rs
new file mode 100644
index 000000000..31a74cfde
--- /dev/null
+++ b/serde_v8/magic/any_value.rs
@@ -0,0 +1,66 @@
+use num_bigint::BigInt;
+
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+use super::buffer::ZeroCopyBuf;
+use super::transl8::FromV8;
+use super::transl8::ToV8;
+use crate::magic::transl8::impl_magic;
+use crate::Error;
+
+/// An untagged enum type that can be any of number, string, bool, bigint, or
+/// buffer.
+#[derive(Debug)]
+pub enum AnyValue {
+  Buffer(ZeroCopyBuf),
+  String(String),
+  Number(f64),
+  BigInt(BigInt),
+  Bool(bool),
+}
+
+impl_magic!(AnyValue);
+
+impl ToV8 for AnyValue {
+  fn to_v8<'a>(
+    &mut self,
+    scope: &mut v8::HandleScope<'a>,
+  ) -> Result<v8::Local<'a, v8::Value>, crate::Error> {
+    match self {
+      Self::Buffer(buf) => buf.to_v8(scope),
+      Self::String(s) => crate::to_v8(scope, s),
+      Self::Number(num) => crate::to_v8(scope, num),
+      Self::BigInt(bigint) => {
+        crate::to_v8(scope, crate::BigInt::from(bigint.clone()))
+      }
+      Self::Bool(b) => crate::to_v8(scope, b),
+    }
+  }
+}
+
+impl FromV8 for AnyValue {
+  fn from_v8(
+    scope: &mut v8::HandleScope,
+    value: v8::Local<v8::Value>,
+  ) -> Result<Self, crate::Error> {
+    if value.is_string() {
+      let string = crate::from_v8(scope, value)?;
+      Ok(AnyValue::String(string))
+    } else if value.is_number() {
+      let string = crate::from_v8(scope, value)?;
+      Ok(AnyValue::Number(string))
+    } else if value.is_big_int() {
+      let bigint = crate::BigInt::from_v8(scope, value)?;
+      Ok(AnyValue::BigInt(bigint.into()))
+    } else if value.is_array_buffer_view() {
+      let buf = ZeroCopyBuf::from_v8(scope, value)?;
+      Ok(AnyValue::Buffer(buf))
+    } else if value.is_boolean() {
+      let string = crate::from_v8(scope, value)?;
+      Ok(AnyValue::Bool(string))
+    } else {
+      Err(Error::Message(
+        "expected string, number, bigint, ArrayBufferView, boolean".into(),
+      ))
+    }
+  }
+}
diff --git a/serde_v8/magic/mod.rs b/serde_v8/magic/mod.rs
index 9e5064867..3e984527d 100644
--- a/serde_v8/magic/mod.rs
+++ b/serde_v8/magic/mod.rs
@@ -1,4 +1,5 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+pub mod any_value;
 pub mod bigint;
 pub mod buffer;
 pub mod bytestring;