1 //! FIXME: write short doc here
5 use ra_syntax::{ast, SmolStr};
7 /// `Name` is a wrapper around string, which is used in hir for both references
8 /// and declarations. In theory, names should also carry hygiene info, but we are
10 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
11 pub struct Name(Repr);
13 #[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
19 impl fmt::Display for Name {
20 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
22 Repr::Text(text) => fmt::Display::fmt(&text, f),
23 Repr::TupleField(idx) => fmt::Display::fmt(&idx, f),
29 /// Note: this is private to make creating name from random string hard.
30 /// Hopefully, this should allow us to integrate hygiene cleaner in the
31 /// future, and to switch to interned representation of names.
32 const fn new_text(text: SmolStr) -> Name {
33 Name(Repr::Text(text))
36 pub fn new_tuple_field(idx: usize) -> Name {
37 Name(Repr::TupleField(idx))
40 /// Shortcut to create inline plain text name
41 const fn new_inline_ascii(text: &[u8]) -> Name {
42 Name::new_text(SmolStr::new_inline_from_ascii(text.len(), text))
45 /// Resolve a name from the text of token.
46 fn resolve(raw_text: &SmolStr) -> Name {
48 if raw_text.as_str().starts_with(raw_start) {
49 Name::new_text(SmolStr::new(&raw_text[raw_start.len()..]))
51 Name::new_text(raw_text.clone())
55 pub fn missing() -> Name {
56 Name::new_text("[missing name]".into())
59 pub fn as_tuple_index(&self) -> Option<usize> {
61 Repr::TupleField(idx) => Some(idx),
68 fn as_name(&self) -> Name;
71 impl AsName for ast::NameRef {
72 fn as_name(&self) -> Name {
73 match self.as_tuple_field() {
74 Some(idx) => Name::new_tuple_field(idx),
75 None => Name::resolve(self.text()),
80 impl AsName for ast::Name {
81 fn as_name(&self) -> Name {
82 Name::resolve(self.text())
86 impl AsName for tt::Ident {
87 fn as_name(&self) -> Name {
88 Name::resolve(&self.text)
92 impl AsName for ast::FieldKind {
93 fn as_name(&self) -> Name {
95 ast::FieldKind::Name(nr) => nr.as_name(),
96 ast::FieldKind::Index(idx) => Name::new_tuple_field(idx.text().parse().unwrap()),
101 impl AsName for ra_db::Dependency {
102 fn as_name(&self) -> Name {
103 Name::new_text(self.name.clone())
108 macro_rules! known_names {
109 ($($ident:ident),* $(,)?) => {
112 pub const $ident: super::Name =
113 super::Name::new_inline_ascii(stringify!($ident).as_bytes());
139 // Components of known path (value or mod name)
146 // Components of known path (type name)
185 // self/Self cannot be used as an identifier
186 pub const SELF_PARAM: super::Name = super::Name::new_inline_ascii(b"self");
187 pub const SELF_TYPE: super::Name = super::Name::new_inline_ascii(b"Self");
192 $crate::name::known::SELF_PARAM
195 $crate::name::known::SELF_TYPE
198 $crate::name::known::$ident