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support AssocTypeArg and MethodCalls

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This commit is contained in:
Max Heller 2023-08-01 18:15:32 -04:00
parent b9ee4a5167
commit f4038a6bf1
2 changed files with 159 additions and 35 deletions
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94
crates/ide-completion/src/context/analysis.rs
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@ -719,6 +719,70 @@ fn classify_name_ref(
None
};
let generic_arg_location = |arg: ast::GenericArg| {
let location = find_opt_node_in_file_compensated(
sema,
original_file,
arg.syntax().parent().and_then(ast::GenericArgList::cast),
)
.map(|args| {
// Determine the index of the parameter in the `GenericArgList`
// (subtract 1 because `siblings` includes the node itself)
let param_idx = arg.syntax().siblings(Direction::Prev).count() - 1;
let parent = args.syntax().parent();
let param = parent.and_then(|parent| {
match_ast! {
match parent {
ast::PathSegment(segment) => {
match sema.resolve_path(&segment.parent_path().top_path())? {
hir::PathResolution::Def(def) => match def {
hir::ModuleDef::Function(func) => {
let src = func.source(sema.db)?;
let params = src.value.generic_param_list()?;
params.generic_params().nth(param_idx)
}
_ => None,
},
_ => None,
}
},
ast::MethodCallExpr(call) => {
let func = sema.resolve_method_call(&call)?;
let src = func.source(sema.db)?;
let params = src.value.generic_param_list()?;
params.generic_params().nth(param_idx)
},
ast::AssocTypeArg(arg) => {
let trait_ = ast::PathSegment::cast(arg.syntax().parent()?.parent()?)?;
match sema.resolve_path(&trait_.parent_path().top_path())? {
hir::PathResolution::Def(def) => match def {
hir::ModuleDef::Trait(trait_) => {
let trait_items = trait_.items(sema.db);
let assoc_ty = trait_items.iter().find_map(|item| match item {
hir::AssocItem::TypeAlias(assoc_ty) => {
(assoc_ty.name(sema.db).as_str()? == arg.name_ref()?.text())
.then_some(assoc_ty)
},
_ => None,
})?;
let src = assoc_ty.source(sema.db)?;
let params = src.value.generic_param_list()?;
params.generic_params().nth(param_idx)
}
_ => None,
},
_ => None,
}
},
_ => None,
}
}
});
(args, param)
});
TypeLocation::GenericArgList(location)
};
let type_location = |node: &SyntaxNode| {
let parent = node.parent()?;
let res = match_ast! {
@ -774,34 +838,8 @@ fn classify_name_ref(
ast::TypeBound(_) => TypeLocation::TypeBound,
// is this case needed?
ast::TypeBoundList(_) => TypeLocation::TypeBound,
ast::GenericArg(it) => {
let location = find_opt_node_in_file_compensated(sema, original_file, it.syntax().parent().and_then(ast::GenericArgList::cast))
.map(|args| {
// Determine the index of the parameter in the `GenericArgList`
// (subtract 1 because `siblings` includes the node itself)
let param_idx = it.syntax().siblings(Direction::Prev).count() - 1;
let param = args
.syntax()
.parent()
.and_then(|p| ast::PathSegment::cast(p))
.and_then(|segment| sema.resolve_path(&segment.parent_path().top_path()))
.and_then(|resolved| {
match resolved {
hir::PathResolution::Def(def) => match def {
hir::ModuleDef::Function(func) => {
let src = func.source(sema.db)?;
let params = src.value.generic_param_list()?;
params.generic_params().nth(param_idx)
}
_ => None,
},
_ => None,
}
});
(args, param)
});
TypeLocation::GenericArgList(location)
},
ast::TypeArg(it) => generic_arg_location(ast::GenericArg::TypeArg(it)),
ast::GenericArg(it) => generic_arg_location(it),
// is this case needed?
ast::GenericArgList(it) => {
let location = find_opt_node_in_file_compensated(sema, original_file, Some(it))