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|
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 hygene info, but we are
/// not there yet!
#[derive(Clone, PartialEq, Eq, Hash)]
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 {
pub(crate) fn as_known_name(&self) -> Option<KnownName> {
let name = match self.text.as_str() {
"isize" => KnownName::Isize,
"i8" => KnownName::I8,
"i16" => KnownName::I16,
"i32" => KnownName::I32,
"i64" => KnownName::I64,
"i128" => KnownName::I128,
"usize" => KnownName::Usize,
"u8" => KnownName::U8,
"u16" => KnownName::U16,
"u32" => KnownName::U32,
"u64" => KnownName::U64,
"u128" => KnownName::U128,
"f32" => KnownName::F32,
"f64" => KnownName::F64,
_ => return None,
};
Some(name)
}
fn new(text: SmolStr) -> Name {
Name { text }
}
}
pub(crate) trait AsName {
fn as_name(&self) -> Name;
}
impl AsName for ast::NameRef<'_> {
fn as_name(&self) -> Name {
Name::new(self.text())
}
}
impl AsName for ast::Name<'_> {
fn as_name(&self) -> Name {
Name::new(self.text())
}
}
impl AsName for ra_db::Dependency {
fn as_name(&self) -> Name {
Name::new(self.name.clone())
}
}
// Ideally, should be replaced with
// ```
// const ISIZE: Name = Name::new("isize")
// ```
// but const-fn is not that powerful yet.
#[derive(Debug)]
pub(crate) enum KnownName {
Isize,
I8,
I16,
I32,
I64,
I128,
Usize,
U8,
U16,
U32,
U64,
U128,
F32,
F64,
}
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