unc_vm_compiler/translator/
error.rs

1use crate::{CompileError, WasmError};
2use wasmparser::BinaryReaderError;
3
4/// Return an `Err(WasmError::Unsupported(msg))` where `msg` the string built by calling `format!`
5/// on the arguments to this macro.
6#[macro_export]
7macro_rules! wasm_unsupported {
8    ($($arg:tt)*) => { $crate::WasmError::Unsupported(format!($($arg)*)) }
9}
10
11impl From<BinaryReaderError> for WasmError {
12    fn from(original: BinaryReaderError) -> Self {
13        Self::InvalidWebAssembly { message: original.message().into(), offset: original.offset() }
14    }
15}
16
17impl From<BinaryReaderError> for CompileError {
18    fn from(original: BinaryReaderError) -> Self {
19        // `From` does not seem to be transitive by default, so we convert
20        // BinaryReaderError -> WasmError -> CompileError
21        Self::from(WasmError::from(original))
22    }
23}
24
25#[cfg(test)]
26mod tests {
27    use super::*;
28    use wasmparser::BinaryReader;
29
30    #[test]
31    fn can_convert_binary_reader_error_to_wasm_error() {
32        let mut reader = BinaryReader::new(b"\0\0\0\0");
33        let binary_reader_error = reader.read_bytes(10).unwrap_err();
34        match WasmError::from(binary_reader_error) {
35            WasmError::InvalidWebAssembly { message, offset } => {
36                assert_eq!(message, "unexpected end-of-file");
37                assert_eq!(offset, 0);
38            }
39            err => panic!("Unexpected error: {:?}", err),
40        }
41    }
42
43    #[test]
44    fn can_convert_binary_reader_error_to_compile_error() {
45        let mut reader = BinaryReader::new(b"\0\0\0\0");
46        let binary_reader_error = reader.read_bytes(10).unwrap_err();
47        match CompileError::from(binary_reader_error) {
48            CompileError::Wasm(WasmError::InvalidWebAssembly { message, offset }) => {
49                assert_eq!(message, "unexpected end-of-file");
50                assert_eq!(offset, 0);
51            }
52            err => panic!("Unexpected error: {:?}", err),
53        }
54    }
55}
unc_vm_compiler/translator/error.rs

unc_vm_compiler/translator/
error.rs
