diff options
Diffstat (limited to 'compiler/rustc_macros/src/hash_stable.rs')
| -rw-r--r-- | compiler/rustc_macros/src/hash_stable.rs | 45 |
1 files changed, 21 insertions, 24 deletions
diff --git a/compiler/rustc_macros/src/hash_stable.rs b/compiler/rustc_macros/src/hash_stable.rs index 63bdcea87..75a2f7009 100644 --- a/compiler/rustc_macros/src/hash_stable.rs +++ b/compiler/rustc_macros/src/hash_stable.rs @@ -1,6 +1,6 @@ use proc_macro2::{self, Ident}; use quote::quote; -use syn::{self, parse_quote, Meta, NestedMeta}; +use syn::{self, parse_quote}; struct Attributes { ignore: bool, @@ -10,32 +10,29 @@ struct Attributes { fn parse_attributes(field: &syn::Field) -> Attributes { let mut attrs = Attributes { ignore: false, project: None }; for attr in &field.attrs { - if let Ok(meta) = attr.parse_meta() { - if !meta.path().is_ident("stable_hasher") { - continue; + let meta = &attr.meta; + if !meta.path().is_ident("stable_hasher") { + continue; + } + let mut any_attr = false; + let _ = attr.parse_nested_meta(|nested| { + if nested.path.is_ident("ignore") { + attrs.ignore = true; + any_attr = true; } - let mut any_attr = false; - if let Meta::List(list) = meta { - for nested in list.nested.iter() { - if let NestedMeta::Meta(meta) = nested { - if meta.path().is_ident("ignore") { - attrs.ignore = true; - any_attr = true; - } - if meta.path().is_ident("project") { - if let Meta::List(list) = meta { - if let Some(NestedMeta::Meta(meta)) = list.nested.iter().next() { - attrs.project = meta.path().get_ident().cloned(); - any_attr = true; - } - } - } + if nested.path.is_ident("project") { + let _ = nested.parse_nested_meta(|meta| { + if attrs.project.is_none() { + attrs.project = meta.path.get_ident().cloned(); } - } - } - if !any_attr { - panic!("error parsing stable_hasher"); + any_attr = true; + Ok(()) + }); } + Ok(()) + }); + if !any_attr { + panic!("error parsing stable_hasher"); } } attrs |