1 files changed, 192 insertions, 0 deletions
diff --git a/vendor/wasm-bindgen/src/describe.rs b/vendor/wasm-bindgen/src/describe.rs
new file mode 100644
index 000000000..2b7c4b628
--- /dev/null
+++ b/vendor/wasm-bindgen/src/describe.rs
@@ -0,0 +1,192 @@
+//! This is an internal module, no stability guarantees are provided. Use at
+//! your own risk.
+
+#![doc(hidden)]
+
+use crate::{Clamped, JsError, JsValue};
+use cfg_if::cfg_if;
+
+macro_rules! tys {
+    ($($a:ident)*) => (tys! { @ ($($a)*) 0 });
+    (@ () $v:expr) => {};
+    (@ ($a:ident $($b:ident)*) $v:expr) => {
+        pub const $a: u32 = $v;
+        tys!(@ ($($b)*) $v+1);
+    }
+}
+
+// NB: this list must be kept in sync with `crates/cli-support/src/descriptor.rs`
+tys! {
+    I8
+    U8
+    I16
+    U16
+    I32
+    U32
+    I64
+    U64
+    F32
+    F64
+    BOOLEAN
+    FUNCTION
+    CLOSURE
+    CACHED_STRING
+    STRING
+    REF
+    REFMUT
+    SLICE
+    VECTOR
+    EXTERNREF
+    NAMED_EXTERNREF
+    ENUM
+    RUST_STRUCT
+    CHAR
+    OPTIONAL
+    RESULT
+    UNIT
+    CLAMPED
+}
+
+#[inline(always)] // see the wasm-interpreter crate
+pub fn inform(a: u32) {
+    unsafe { super::__wbindgen_describe(a) }
+}
+
+pub trait WasmDescribe {
+    fn describe();
+}
+
+macro_rules! simple {
+    ($($t:ident => $d:ident)*) => ($(
+        impl WasmDescribe for $t {
+            fn describe() { inform($d) }
+        }
+    )*)
+}
+
+simple! {
+    i8 => I8
+    u8 => U8
+    i16 => I16
+    u16 => U16
+    i32 => I32
+    u32 => U32
+    i64 => I64
+    u64 => U64
+    isize => I32
+    usize => U32
+    f32 => F32
+    f64 => F64
+    bool => BOOLEAN
+    char => CHAR
+    JsValue => EXTERNREF
+}
+
+cfg_if! {
+    if #[cfg(feature = "enable-interning")] {
+        simple! {
+            str => CACHED_STRING
+        }
+
+    } else {
+        simple! {
+            str => STRING
+        }
+    }
+}
+
+impl<T> WasmDescribe for *const T {
+    fn describe() {
+        inform(I32)
+    }
+}
+
+impl<T> WasmDescribe for *mut T {
+    fn describe() {
+        inform(I32)
+    }
+}
+
+impl<T: WasmDescribe> WasmDescribe for [T] {
+    fn describe() {
+        inform(SLICE);
+        T::describe();
+    }
+}
+
+impl<'a, T: WasmDescribe + ?Sized> WasmDescribe for &'a T {
+    fn describe() {
+        inform(REF);
+        T::describe();
+    }
+}
+
+impl<'a, T: WasmDescribe + ?Sized> WasmDescribe for &'a mut T {
+    fn describe() {
+        inform(REFMUT);
+        T::describe();
+    }
+}
+
+if_std! {
+    use std::prelude::v1::*;
+
+    cfg_if! {
+        if #[cfg(feature = "enable-interning")] {
+            simple! {
+                String => CACHED_STRING
+            }
+
+        } else {
+            simple! {
+                String => STRING
+            }
+        }
+    }
+
+    impl<T: WasmDescribe> WasmDescribe for Box<[T]> {
+        fn describe() {
+            inform(VECTOR);
+            T::describe();
+        }
+    }
+
+    impl<T> WasmDescribe for Vec<T> where Box<[T]>: WasmDescribe {
+        fn describe() {
+            <Box<[T]>>::describe();
+        }
+    }
+}
+
+impl<T: WasmDescribe> WasmDescribe for Option<T> {
+    fn describe() {
+        inform(OPTIONAL);
+        T::describe();
+    }
+}
+
+impl WasmDescribe for () {
+    fn describe() {
+        inform(UNIT)
+    }
+}
+
+impl<T: WasmDescribe, E: Into<JsValue>> WasmDescribe for Result<T, E> {
+    fn describe() {
+        inform(RESULT);
+        T::describe();
+    }
+}
+
+impl<T: WasmDescribe> WasmDescribe for Clamped<T> {
+    fn describe() {
+        inform(CLAMPED);
+        T::describe();
+    }
+}
+
+impl WasmDescribe for JsError {
+    fn describe() {
+        JsValue::describe();
+    }
+}