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Cleanup convert_path

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This commit is contained in:
Lukas Wirth 2024-01-25 10:23:00 +01:00
parent 880baa9e56
commit d8ef6c24cc
4 changed files with 34 additions and 42 deletions
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68
crates/hir-expand/src/mod_path.rs
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@ -51,7 +51,7 @@ impl ModPath {
path: ast::Path,
span_map: SpanMapRef<'_>,
) -> Option<ModPath> {
convert_path(db, None, path, span_map)
convert_path(db, path, span_map)
}
pub fn from_tt(db: &dyn ExpandDatabase, tt: &[tt::TokenTree]) -> Option<ModPath> {
@ -199,22 +199,15 @@ fn display_fmt_path(
fn convert_path(
db: &dyn ExpandDatabase,
prefix: Option<ModPath>,
path: ast::Path,
span_map: SpanMapRef<'_>,
) -> Option<ModPath> {
let prefix = match path.qualifier() {
Some(qual) => Some(convert_path(db, prefix, qual, span_map)?),
None => prefix,
};
let mut segments = path.segments();
let segment = path.segment()?;
let segment = &segments.next()?;
let mut mod_path = match segment.kind()? {
ast::PathSegmentKind::Name(name_ref) => {
if name_ref.text() == "$crate" {
if prefix.is_some() {
return None;
}
ModPath::from_kind(
resolve_crate_root(
db,
@ -224,41 +217,36 @@ fn convert_path(
.unwrap_or(PathKind::Crate),
)
} else {
let mut res = prefix.unwrap_or_else(|| {
ModPath::from_kind(
segment.coloncolon_token().map_or(PathKind::Plain, |_| PathKind::Abs),
)
});
let mut res = ModPath::from_kind(
segment.coloncolon_token().map_or(PathKind::Plain, |_| PathKind::Abs),
);
res.segments.push(name_ref.as_name());
res
}
}
ast::PathSegmentKind::SelfTypeKw => {
if prefix.is_some() {
return None;
}
ModPath::from_segments(PathKind::Plain, Some(known::SELF_TYPE))
}
ast::PathSegmentKind::CrateKw => {
if prefix.is_some() {
return None;
}
ModPath::from_segments(PathKind::Crate, iter::empty())
}
ast::PathSegmentKind::SelfKw => {
if prefix.is_some() {
return None;
}
ModPath::from_segments(PathKind::Super(0), iter::empty())
}
ast::PathSegmentKind::CrateKw => ModPath::from_segments(PathKind::Crate, iter::empty()),
ast::PathSegmentKind::SelfKw => ModPath::from_segments(PathKind::Super(0), iter::empty()),
ast::PathSegmentKind::SuperKw => {
let nested_super_count = match prefix.map(|p| p.kind) {
Some(PathKind::Super(n)) => n,
Some(_) => return None,
None => 0,
};
let mut deg = 1;
let mut next_segment = None;
while let Some(segment) = segments.next() {
match segment.kind()? {
ast::PathSegmentKind::SuperKw => deg += 1,
ast::PathSegmentKind::Name(name) => {
next_segment = Some(name.as_name());
break;
}
ast::PathSegmentKind::Type { .. }
| ast::PathSegmentKind::SelfTypeKw
| ast::PathSegmentKind::SelfKw
| ast::PathSegmentKind::CrateKw => return None,
}
}
ModPath::from_segments(PathKind::Super(nested_super_count + 1), iter::empty())
ModPath::from_segments(PathKind::Super(deg), next_segment)
}
ast::PathSegmentKind::Type { .. } => {
// not allowed in imports
@ -266,6 +254,14 @@ fn convert_path(
}
};
for segment in segments {
let name = match segment.kind()? {
ast::PathSegmentKind::Name(name) => name.as_name(),
_ => return None,
};
mod_path.segments.push(name);
}
// handle local_inner_macros :
// Basically, even in rustc it is quite hacky:
// https://github.com/rust-lang/rust/blob/614f273e9388ddd7804d5cbc80b8865068a3744e/src/librustc_resolve/macros.rs#L456