| 1 | use crate::expand::call_site_ident; |
| 2 | use proc_macro2::TokenStream; |
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| 3 | use quote::quote; |
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| 4 | use syn::DeriveInput; |
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| 5 | |
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| 6 | pub(crate) fn expand(input: &DeriveInput, error: syn::Error) -> TokenStream { |
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| 7 | let ty = call_site_ident(&input.ident); |
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| 8 | let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl(); |
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| 9 | |
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| 10 | let error = error.to_compile_error(); |
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| 11 | |
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| 12 | quote! { |
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| 13 | #error |
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| 14 | |
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| 15 | #[allow(unused_qualifications)] |
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| 16 | #[automatically_derived] |
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| 17 | impl #impl_generics ::thiserror::__private::Error for #ty #ty_generics #where_clause |
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| 18 | where |
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| 19 | // Work around trivial bounds being unstable. |
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| 20 | // https://github.com/rust-lang/rust/issues/48214 |
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| 21 | for<'workaround> #ty #ty_generics: ::core::fmt::Debug, |
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| 22 | {} |
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| 23 | |
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| 24 | #[allow(unused_qualifications)] |
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| 25 | #[automatically_derived] |
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| 26 | impl #impl_generics ::core::fmt::Display for #ty #ty_generics #where_clause { |
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| 27 | fn fmt(&self, __formatter: &mut ::core::fmt::Formatter) -> ::core::fmt::Result { |
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| 28 | ::core::unreachable!() |
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| 29 | } |
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| 30 | } |
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| 31 | } |
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| 32 | } |
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| 33 | |
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