diff options
Diffstat (limited to 'src/tools/rust-analyzer/crates/ide-db/src/path_transform.rs')
-rw-r--r-- | src/tools/rust-analyzer/crates/ide-db/src/path_transform.rs | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/src/tools/rust-analyzer/crates/ide-db/src/path_transform.rs b/src/tools/rust-analyzer/crates/ide-db/src/path_transform.rs index 12d873b4a..6402a84a6 100644 --- a/src/tools/rust-analyzer/crates/ide-db/src/path_transform.rs +++ b/src/tools/rust-analyzer/crates/ide-db/src/path_transform.rs @@ -33,7 +33,7 @@ use syntax::{ /// } /// ``` pub struct PathTransform<'a> { - generic_def: hir::GenericDef, + generic_def: Option<hir::GenericDef>, substs: Vec<ast::Type>, target_scope: &'a SemanticsScope<'a>, source_scope: &'a SemanticsScope<'a>, @@ -49,7 +49,7 @@ impl<'a> PathTransform<'a> { PathTransform { source_scope, target_scope, - generic_def: trait_.into(), + generic_def: Some(trait_.into()), substs: get_syntactic_substs(impl_).unwrap_or_default(), } } @@ -63,28 +63,42 @@ impl<'a> PathTransform<'a> { PathTransform { source_scope, target_scope, - generic_def: function.into(), + generic_def: Some(function.into()), substs: get_type_args_from_arg_list(generic_arg_list).unwrap_or_default(), } } + pub fn generic_transformation( + target_scope: &'a SemanticsScope<'a>, + source_scope: &'a SemanticsScope<'a>, + ) -> PathTransform<'a> { + PathTransform { source_scope, target_scope, generic_def: None, substs: Vec::new() } + } + pub fn apply(&self, syntax: &SyntaxNode) { self.build_ctx().apply(syntax) } + pub fn apply_all<'b>(&self, nodes: impl IntoIterator<Item = &'b SyntaxNode>) { + let ctx = self.build_ctx(); + for node in nodes { + ctx.apply(node); + } + } + fn build_ctx(&self) -> Ctx<'a> { let db = self.source_scope.db; let target_module = self.target_scope.module(); let source_module = self.source_scope.module(); let skip = match self.generic_def { // this is a trait impl, so we need to skip the first type parameter -- this is a bit hacky - hir::GenericDef::Trait(_) => 1, + Some(hir::GenericDef::Trait(_)) => 1, _ => 0, }; let substs_by_param: FxHashMap<_, _> = self .generic_def - .type_params(db) .into_iter() + .flat_map(|it| it.type_params(db)) .skip(skip) // The actual list of trait type parameters may be longer than the one // used in the `impl` block due to trailing default type parameters. |