bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide_db/src/active_parameter.rs')
-rw-r--r--crates/ide_db/src/active_parameter.rs60
1 files changed, 9 insertions, 51 deletions
diff --git a/crates/ide_db/src/active_parameter.rs b/crates/ide_db/src/active_parameter.rs
index 67b819c5a5..788a5ed17e 100644
--- a/crates/ide_db/src/active_parameter.rs
+++ b/crates/ide_db/src/active_parameter.rs
@@ -43,13 +43,21 @@ pub fn callable_for_token(
sema: &Semantics<RootDatabase>,
token: SyntaxToken,
) -> Option<(hir::Callable, Option<usize>)> {
- // Find the calling expression and it's NameRef
+ // Find the calling expression and its NameRef
let parent = token.parent()?;
let calling_node = parent.ancestors().filter_map(ast::CallableExpr::cast).find(|it| {
it.arg_list()
.map_or(false, |it| it.syntax().text_range().contains(token.text_range().start()))
})?;
+ callable_for_node(sema, &calling_node, &token)
+}
+
+pub fn callable_for_node(
+ sema: &Semantics<RootDatabase>,
+ calling_node: &ast::CallableExpr,
+ token: &SyntaxToken,
+) -> Option<(hir::Callable, Option<usize>)> {
let callable = match &calling_node {
ast::CallableExpr::Call(call) => {
let expr = call.expr()?;
@@ -68,53 +76,3 @@ pub fn callable_for_token(
};
Some((callable, active_param))
}
-
-pub fn generics_for_token(
- sema: &Semantics<RootDatabase>,
- token: SyntaxToken,
-) -> Option<(hir::GenericDef, usize)> {
- let parent = token.parent()?;
- let arg_list = parent
- .ancestors()
- .filter_map(ast::GenericArgList::cast)
- .find(|list| list.syntax().text_range().contains(token.text_range().start()))?;
-
- let active_param = arg_list
- .generic_args()
- .take_while(|arg| arg.syntax().text_range().end() <= token.text_range().start())
- .count();
-
- if let Some(path) = arg_list.syntax().ancestors().find_map(ast::Path::cast) {
- let res = sema.resolve_path(&path)?;
- let generic_def: hir::GenericDef = match res {
- hir::PathResolution::Def(hir::ModuleDef::Adt(it)) => it.into(),
- hir::PathResolution::Def(hir::ModuleDef::Function(it)) => it.into(),
- hir::PathResolution::Def(hir::ModuleDef::Trait(it)) => it.into(),
- hir::PathResolution::Def(hir::ModuleDef::TypeAlias(it)) => it.into(),
- hir::PathResolution::Def(hir::ModuleDef::Variant(it)) => it.into(),
- hir::PathResolution::Def(hir::ModuleDef::BuiltinType(_))
- | hir::PathResolution::Def(hir::ModuleDef::Const(_))
- | hir::PathResolution::Def(hir::ModuleDef::Macro(_))
- | hir::PathResolution::Def(hir::ModuleDef::Module(_))
- | hir::PathResolution::Def(hir::ModuleDef::Static(_)) => return None,
- hir::PathResolution::AssocItem(hir::AssocItem::Function(it)) => it.into(),
- hir::PathResolution::AssocItem(hir::AssocItem::TypeAlias(it)) => it.into(),
- hir::PathResolution::AssocItem(hir::AssocItem::Const(_)) => return None,
- hir::PathResolution::BuiltinAttr(_)
- | hir::PathResolution::ToolModule(_)
- | hir::PathResolution::Local(_)
- | hir::PathResolution::TypeParam(_)
- | hir::PathResolution::ConstParam(_)
- | hir::PathResolution::SelfType(_) => return None,
- };
-
- Some((generic_def, active_param))
- } else if let Some(method_call) = arg_list.syntax().parent().and_then(ast::MethodCallExpr::cast)
- {
- // recv.method::<$0>()
- let method = sema.resolve_method_call(&method_call)?;
- Some((method.into(), active_param))
- } else {
- None
- }
-}