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//! 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)*) $v+1);
}
}
// NB: this list must be kept in sync with `crates/cli-support/src/descriptor.rs`
tys! {
I8
U8
I16
U16
I32
U32
I64
U64
F32
F64
BOOLEAN
FUNCTION
CLOSURE
CACHED_STRING
STRING
REF
REFMUT
LONGREF
SLICE
VECTOR
EXTERNREF
NAMED_EXTERNREF
ENUM
RUST_STRUCT
CHAR
OPTIONAL
RESULT
UNIT
CLAMPED
}
#[inline(always)] // see the wasm-interpreter crate
pub fn inform(a: u32) {
unsafe { super::__wbindgen_describe(a) }
}
pub trait WasmDescribe {
fn describe();
}
macro_rules! simple {
($($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();
}
}
|
