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a3b620fff7
Generalize the CompileError tuple to an enum, that can be either an error message or a parse error from syn. Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
26 lines
675 B
Rust
26 lines
675 B
Rust
// Procedural macro utilities.
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// Author(s): Paolo Bonzini <pbonzini@redhat.com>
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// SPDX-License-Identifier: GPL-2.0-or-later
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use proc_macro2::Span;
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use quote::quote_spanned;
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pub enum MacroError {
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Message(String, Span),
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ParseError(syn::Error),
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}
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impl From<syn::Error> for MacroError {
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fn from(err: syn::Error) -> Self {
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MacroError::ParseError(err)
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}
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}
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impl From<MacroError> for proc_macro2::TokenStream {
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fn from(err: MacroError) -> Self {
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match err {
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MacroError::Message(msg, span) => quote_spanned! { span => compile_error!(#msg); },
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MacroError::ParseError(err) => err.into_compile_error(),
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}
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}
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}
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