1 use std::error;
2 use std::fmt;
3 
4 /// Errors that can occur during code generation.
5 #[derive(Clone, Debug, PartialEq, Eq)]
6 pub(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 
26 impl fmt::Display for Error {
fmt(&self, f: &mut fmt::Formatter) -> fmt::Result27     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."
34                     .fmt(f)
35             }
36             Error::UnsupportedAbi(abi) => {
37                  write!(
38                     f,
39                     "{} ABI is not supported by the configured Rust target.",
40                     abi
41                 )
42             }
43             Error::InvalidPointerSize { ty_name, ty_size, ptr_size } => {
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 
50 impl error::Error for Error {}
51 
52 /// A `Result` of `T` or an error of `bindgen::codegen::error::Error`.
53 pub(crate) type Result<T> = ::std::result::Result<T, Error>;
54