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ir: Minor cleanup to the cfg code.

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This commit is contained in:
Emilio Cobos Álvarez 2020-04-21 19:54:07 +02:00
parent 8139fbf3c7
commit d0d6716556
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GPG Key ID: E1152D0994E4BF8A
1 changed files with 19 additions and 21 deletions
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40
src/bindgen/ir/cfg.rs
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@ -124,29 +124,27 @@ impl Cfg {
}
pub fn load_metadata(dependency: &Dependency) -> Option<Cfg> {
match &dependency.target {
Some(target) => match syn::parse_str::<syn::Meta>(target) {
Ok(target) => {
// Parsing succeeded using the #[cfg] syntax
if let syn::Meta::List(syn::MetaList { path, nested, .. }) = target {
if !path.is_ident("cfg") || nested.len() != 1 {
return None;
}
Cfg::load_single(nested.first().unwrap())
} else {
None
let target = dependency.target.as_ref()?;
match syn::parse_str::<syn::Meta>(target) {
Ok(target) => {
// Parsing succeeded using the #[cfg] syntax
if let syn::Meta::List(syn::MetaList { path, nested, .. }) = target {
if !path.is_ident("cfg") || nested.len() != 1 {
return None;
}
Cfg::load_single(nested.first().unwrap())
} else {
None
}
Err(_) =>
// Parsing failed using #[cfg], this may be a literal target name
{
Cfg::load_single(&syn::NestedMeta::Lit(syn::Lit::Str(syn::LitStr::new(
target,
proc_macro2::Span::call_site(),
))))
}
},
None => None,
}
Err(_) => {
// Parsing failed using #[cfg], this may be a literal target
// name
Cfg::load_single(&syn::NestedMeta::Lit(syn::Lit::Str(syn::LitStr::new(
target,
proc_macro2::Span::call_site(),
))))
}
}
}