use std::fmt; use ra_syntax::{ast, SmolStr}; /// `Name` is a wrapper around string, which is used in hir for both references /// and declarations. In theory, names should also carry hygiene info, but we are /// not there yet! #[derive(Clone, PartialEq, Eq, Hash, PartialOrd, Ord)] pub struct Name { text: SmolStr, } impl fmt::Display for Name { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Display::fmt(&self.text, f) } } impl fmt::Debug for Name { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Debug::fmt(&self.text, f) } } impl Name { /// Note: this is private to make creating name from random string hard. /// Hopefully, this should allow us to integrate hygiene cleaner in the /// future, and to switch to interned representation of names. const fn new(text: SmolStr) -> Name { Name { text } } pub(crate) fn missing() -> Name { Name::new("[missing name]".into()) } pub(crate) fn tuple_field_name(idx: usize) -> Name { Name::new(idx.to_string().into()) } // Needed for Deref pub(crate) fn target() -> Name { Name::new("Target".into()) } // There's should be no way to extract a string out of `Name`: `Name` in the // future, `Name` will include hygiene information, and you can't encode // hygiene into a String. // // If you need to compare something with `Name`, compare `Name`s directly. // // If you need to render `Name` for the user, use the `Display` impl, but be // aware that it strips hygiene info. #[deprecated(note = "use to_string instead")] pub fn as_smolstr(&self) -> &SmolStr { &self.text } } pub(crate) trait AsName { fn as_name(&self) -> Name; } impl AsName for ast::NameRef { fn as_name(&self) -> Name { let name = resolve_name(self.text()); Name::new(name) } } impl AsName for ast::Name { fn as_name(&self) -> Name { let name = resolve_name(self.text()); Name::new(name) } } impl AsName for ast::FieldKind { fn as_name(&self) -> Name { match self { ast::FieldKind::Name(nr) => nr.as_name(), ast::FieldKind::Index(idx) => Name::new(idx.text().clone()), } } } impl AsName for ra_db::Dependency { fn as_name(&self) -> Name { Name::new(self.name.clone()) } } pub(crate) const ISIZE: Name = Name::new(SmolStr::new_inline_from_ascii(5, b"isize")); pub(crate) const I8: Name = Name::new(SmolStr::new_inline_from_ascii(2, b"i8")); pub(crate) const I16: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"i16")); pub(crate) const I32: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"i32")); pub(crate) const I64: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"i64")); pub(crate) const I128: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"i128")); pub(crate) const USIZE: Name = Name::new(SmolStr::new_inline_from_ascii(5, b"usize")); pub(crate) const U8: Name = Name::new(SmolStr::new_inline_from_ascii(2, b"u8")); pub(crate) const U16: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"u16")); pub(crate) const U32: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"u32")); pub(crate) const U64: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"u64")); pub(crate) const U128: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"u128")); pub(crate) const F32: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"f32")); pub(crate) const F64: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"f64")); pub(crate) const BOOL: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"bool")); pub(crate) const CHAR: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"char")); pub(crate) const STR: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"str")); pub(crate) const SELF_PARAM: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"self")); pub(crate) const SELF_TYPE: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"Self")); pub(crate) const MACRO_RULES: Name = Name::new(SmolStr::new_inline_from_ascii(11, b"macro_rules")); pub(crate) const STD: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"std")); pub(crate) const ITER: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"iter")); pub(crate) const INTO_ITERATOR: Name = Name::new(SmolStr::new_inline_from_ascii(12, b"IntoIterator")); pub(crate) const ITEM: Name = Name::new(SmolStr::new_inline_from_ascii(4, b"Item")); pub(crate) const OPS: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"ops")); pub(crate) const TRY: Name = Name::new(SmolStr::new_inline_from_ascii(3, b"Try")); pub(crate) const OK: Name = Name::new(SmolStr::new_inline_from_ascii(2, b"Ok")); pub(crate) const FUTURE_MOD: Name = Name::new(SmolStr::new_inline_from_ascii(6, b"future")); pub(crate) const FUTURE_TYPE: Name = Name::new(SmolStr::new_inline_from_ascii(6, b"Future")); pub(crate) const RESULT_MOD: Name = Name::new(SmolStr::new_inline_from_ascii(6, b"result")); pub(crate) const RESULT_TYPE: Name = Name::new(SmolStr::new_inline_from_ascii(6, b"Result")); pub(crate) const OUTPUT: Name = Name::new(SmolStr::new_inline_from_ascii(6, b"Output")); fn resolve_name(text: &SmolStr) -> SmolStr { let raw_start = "r#"; if text.as_str().starts_with(raw_start) { SmolStr::new(&text[raw_start.len()..]) } else { text.clone() } }