@@ -28,76 +28,76 @@ macro_rules! language_item_table {
2828 $( $variant: ident, $name: expr, $method: ident, $target: path; ) *
2929 ) => {
3030
31- enum_from_u32! {
32- /// A representation of all the valid language items in Rust.
33- [ derive( Debug , Copy , Clone , PartialEq , Eq , Hash , RustcEncodable , RustcDecodable ) ]
34- pub enum LangItem {
35- $( $variant, ) *
36- }
37- }
38-
39- impl LangItem {
40- /// Returns the `name` in `#[lang = "$name"]`.
41- /// For example, `LangItem::EqTraitLangItem`,
42- /// that is `#[lang = "eq"]` would result in `"eq"`.
43- pub fn name( self ) -> & ' static str {
44- match self {
45- $( $variant => $name, ) *
31+ enum_from_u32! {
32+ /// A representation of all the valid language items in Rust.
33+ [ derive( Debug , Copy , Clone , PartialEq , Eq , Hash , RustcEncodable , RustcDecodable ) ]
34+ pub enum LangItem {
35+ $( $variant, ) *
36+ }
4637 }
47- }
48- }
49-
50- #[ derive( HashStable_Generic ) ]
51- pub struct LanguageItems {
52- /// Mappings from lang items to their possibly found `DefId`s.
53- /// The index corresponds to the order in `LangItem`.
54- pub items: Vec <Option <DefId >>,
55- /// Lang items that were not found during collection.
56- pub missing: Vec <LangItem >,
57- }
58-
59- impl LanguageItems {
60- /// Construct an empty collection of lang items and no missing ones.
61- pub fn new( ) -> Self {
62- fn init_none( _: LangItem ) -> Option <DefId > { None }
6338
64- Self {
65- items: vec![ $( init_none( $variant) ) ,* ] ,
66- missing: Vec :: new( ) ,
39+ impl LangItem {
40+ /// Returns the `name` in `#[lang = "$name"]`.
41+ /// For example, `LangItem::EqTraitLangItem`,
42+ /// that is `#[lang = "eq"]` would result in `"eq"`.
43+ pub fn name( self ) -> & ' static str {
44+ match self {
45+ $( $variant => $name, ) *
46+ }
47+ }
6748 }
68- }
69-
70- /// Returns the mappings to the possibly found `DefId`s for each lang item.
71- pub fn items( & self ) -> & [ Option <DefId >] {
72- & * self . items
73- }
7449
75- /// Requires that a given `LangItem` was bound and returns the corresponding `DefId`.
76- /// If it wasn't bound, e.g. due to a missing `#[lang = "<it.name()>"]`,
77- /// returns an error message as a string.
78- pub fn require( & self , it: LangItem ) -> Result <DefId , String > {
79- self . items[ it as usize ] . ok_or_else( || format!( "requires `{}` lang_item" , it. name( ) ) )
80- }
50+ #[ derive( HashStable_Generic ) ]
51+ pub struct LanguageItems {
52+ /// Mappings from lang items to their possibly found `DefId`s.
53+ /// The index corresponds to the order in `LangItem`.
54+ pub items: Vec <Option <DefId >>,
55+ /// Lang items that were not found during collection.
56+ pub missing: Vec <LangItem >,
57+ }
8158
82- $(
83- /// Returns the corresponding `DefId` for the lang item
84- [ doc = $name]
85- /// if it exists.
86- [ allow( dead_code) ]
87- pub fn $method( & self ) -> Option <DefId > {
88- self . items[ $variant as usize ]
59+ impl LanguageItems {
60+ /// Construct an empty collection of lang items and no missing ones.
61+ pub fn new( ) -> Self {
62+ fn init_none( _: LangItem ) -> Option <DefId > { None }
63+
64+ Self {
65+ items: vec![ $( init_none( $variant) ) ,* ] ,
66+ missing: Vec :: new( ) ,
67+ }
68+ }
69+
70+ /// Returns the mappings to the possibly found `DefId`s for each lang item.
71+ pub fn items( & self ) -> & [ Option <DefId >] {
72+ & * self . items
73+ }
74+
75+ /// Requires that a given `LangItem` was bound and returns the corresponding `DefId`.
76+ /// If it wasn't bound, e.g. due to a missing `#[lang = "<it.name()>"]`,
77+ /// returns an error message as a string.
78+ pub fn require( & self , it: LangItem ) -> Result <DefId , String > {
79+ self . items[ it as usize ] . ok_or_else( || format!( "requires `{}` lang_item" , it. name( ) ) )
80+ }
81+
82+ $(
83+ /// Returns the corresponding `DefId` for the lang item
84+ [ doc = $name]
85+ /// if it exists.
86+ [ allow( dead_code) ]
87+ pub fn $method( & self ) -> Option <DefId > {
88+ self . items[ $variant as usize ]
89+ }
90+ ) *
8991 }
90- ) *
91- }
9292
93- lazy_static! {
94- /// A mapping from the name of the lang item to its order and the form it must be of.
95- pub static ref ITEM_REFS : FxHashMap <& ' static str , ( usize , Target ) > = {
96- let mut item_refs = FxHashMap :: default ( ) ;
97- $( item_refs. insert( $name, ( $variant as usize , $target) ) ; ) *
98- item_refs
99- } ;
100- }
93+ lazy_static! {
94+ /// A mapping from the name of the lang item to its order and the form it must be of.
95+ pub static ref ITEM_REFS : FxHashMap <& ' static str , ( usize , Target ) > = {
96+ let mut item_refs = FxHashMap :: default ( ) ;
97+ $( item_refs. insert( $name, ( $variant as usize , $target) ) ; ) *
98+ item_refs
99+ } ;
100+ }
101101
102102// End of the macro
103103 }
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