watt 0.5.0

Runtime for executing Rust procedural macros compiled as WebAssembly.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57

use super::ffi;
use std::fmt::{self, Debug, Display};
use std::mem;

#[repr(transparent)]
pub struct Trap {
    pub(crate) raw: *mut ffi::wasm_trap_t,
}

impl Trap {
    pub fn message(&self) -> Message {
        unsafe {
            let mut raw = mem::zeroed();
            ffi::wasm_trap_message(self.raw, &mut raw);
            Message { raw }
        }
    }
}

impl Display for Trap {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        Display::fmt(self.message().as_str(), f)
    }
}

impl Debug for Trap {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        Display::fmt(self, f)
    }
}

impl Drop for Trap {
    fn drop(&mut self) {
        unsafe {
            ffi::wasm_trap_delete(self.raw);
        }
    }
}

#[repr(transparent)]
pub struct Message {
    pub(crate) raw: ffi::wasm_message_t,
}

impl Message {
    pub fn as_str(&self) -> &str {
        unsafe { super::name_to_str(&self.raw) }
    }
}

impl Drop for Message {
    fn drop(&mut self) {
        unsafe {
            ffi::wasm_byte_vec_delete(&mut self.raw);
        }
    }
}