1use std::error;
2use std::fmt;
3
4/// Errors that can occur during code generation.
5#[derive(Clone, Debug, PartialEq, Eq)]
6pub(crate) enum Error {
7 /// Tried to generate an opaque blob for a type that did not have a layout.
8 NoLayoutForOpaqueBlob,
9
10 /// Tried to instantiate an opaque template definition, or a template
11 /// definition that is too difficult for us to understand (like a partial
12 /// template specialization).
13 InstantiationOfOpaqueType,
14
15 /// Function ABI is not supported.
16 UnsupportedAbi(&'static str),
17
18 /// The pointer type size does not match the target's pointer size.
19 InvalidPointerSize {
20 ty_name: String,
21 ty_size: usize,
22 ptr_size: usize,
23 },
24}
25
26impl fmt::Display for Error {
27 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
28 match self {
29 Error::NoLayoutForOpaqueBlob => {
30 "Tried to generate an opaque blob, but had no layout.".fmt(f)
31 }
32 Error::InstantiationOfOpaqueType => {
33 "Instantiation of opaque template type or partial template specialization."&'static str
34 .fmt(f)
35 }
36 Error::UnsupportedAbi(abi: &&'static str) => {
37 write!(
38 f,
39 "{} ABI is not supported by the configured Rust target.",
40 abi
41 )
42 }
43 Error::InvalidPointerSize { ty_name: &String, ty_size: &usize, ptr_size: &usize } => {
44 write!(f, "The {} pointer type has size {} but the current target's pointer size is {}.", ty_name, ty_size, ptr_size)
45 }
46 }
47 }
48}
49
50impl error::Error for Error {}
51
52/// A `Result` of `T` or an error of `bindgen::codegen::error::Error`.
53pub(crate) type Result<T> = ::std::result::Result<T, Error>;
54