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Remove ImmediateLocation in favor of PathKind::Type

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This commit is contained in:
Lukas Wirth 2022-06-17 14:18:03 +02:00
parent 6b246292ca
commit f201a40492
5 changed files with 87 additions and 157 deletions
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4
crates/ide-completion/src/completions/field.rs
View file

@ -3,7 +3,7 @@
use crate::{
context::{
IdentContext, NameContext, NameKind, NameRefContext, NameRefKind, PathCompletionCtx,
PathKind,
PathKind, TypeLocation,
},
CompletionContext, Completions,
};
@ -18,7 +18,7 @@ pub(crate) fn complete_field_list(acc: &mut Completions, ctx: &CompletionContext
is_absolute_path: false,
qualifier: None,
parent: None,
kind: PathKind::Type { in_tuple_struct: true, ascription: None },
kind: PathKind::Type { location: TypeLocation::TupleField },
has_type_args: false,
..
})),

10
crates/ide-completion/src/completions/flyimport.rs
View file

@ -9,9 +9,9 @@ use syntax::{AstNode, SyntaxNode, T};
use crate::{
context::{
CompletionContext, NameRefContext, NameRefKind, PathCompletionCtx, PathKind, PatternContext,
CompletionContext, NameRefContext, NameRefKind, PathCompletionCtx, PathKind,
PatternContext, TypeLocation,
},
patterns::ImmediateLocation,
render::{render_resolution_with_import, RenderContext},
};
@ -112,7 +112,7 @@ pub(crate) fn import_on_the_fly(acc: &mut Completions, ctx: &CompletionContext)
if !ctx.config.enable_imports_on_the_fly {
return None;
}
let path_kind = match dbg!(ctx.nameref_ctx()) {
let path_kind = match ctx.nameref_ctx() {
Some(NameRefContext {
kind:
Some(NameRefKind::Path(PathCompletionCtx {
@ -176,8 +176,8 @@ pub(crate) fn import_on_the_fly(acc: &mut Completions, ctx: &CompletionContext)
(PathKind::Pat, ItemInNs::Types(_)) => true,
(PathKind::Pat, ItemInNs::Values(def)) => matches!(def, hir::ModuleDef::Const(_)),
(PathKind::Type { .. }, ItemInNs::Types(ty)) => {
if matches!(ctx.completion_location, Some(ImmediateLocation::TypeBound)) {
(PathKind::Type { location }, ItemInNs::Types(ty)) => {
if matches!(location, TypeLocation::TypeBound) {
matches!(ty, ModuleDef::Trait(_))
} else {
true

43
crates/ide-completion/src/completions/type.rs
View file

@ -5,8 +5,7 @@ use ide_db::FxHashSet;
use syntax::{ast, AstNode};
use crate::{
context::{PathCompletionCtx, PathKind, PathQualifierCtx, TypeAscriptionTarget},
patterns::ImmediateLocation,
context::{PathCompletionCtx, PathKind, PathQualifierCtx, TypeAscriptionTarget, TypeLocation},
render::render_type_inference,
CompletionContext, Completions,
};
@ -14,13 +13,13 @@ use crate::{
pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext) {
let _p = profile::span("complete_type_path");
let (&is_absolute_path, qualifier) = match ctx.path_context() {
let (&is_absolute_path, location, qualifier) = match ctx.path_context() {
Some(PathCompletionCtx {
kind: PathKind::Type { .. },
kind: PathKind::Type { location },
is_absolute_path,
qualifier,
..
}) => (is_absolute_path, qualifier),
}) => (is_absolute_path, location, qualifier),
_ => return,
};
@ -32,7 +31,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
ScopeDef::ModuleDef(Function(_) | Variant(_) | Static(_)) | ScopeDef::Local(_) => false,
// unless its a constant in a generic arg list position
ScopeDef::ModuleDef(Const(_)) | ScopeDef::GenericParam(ConstParam(_)) => {
ctx.expects_generic_arg()
matches!(location, TypeLocation::GenericArgList(_))
}
ScopeDef::ImplSelfType(_) => {
!ctx.previous_token_is(syntax::T![impl]) && !ctx.previous_token_is(syntax::T![for])
@ -47,6 +46,14 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
}
};
let add_assoc_item = |acc: &mut Completions, item| match item {
hir::AssocItem::Const(ct) if matches!(location, TypeLocation::GenericArgList(_)) => {
acc.add_const(ctx, ct)
}
hir::AssocItem::Function(_) | hir::AssocItem::Const(_) => (),
hir::AssocItem::TypeAlias(ty) => acc.add_type_alias(ctx, ty),
};
match qualifier {
Some(PathQualifierCtx { is_infer_qualifier, resolution, .. }) => {
if *is_infer_qualifier {
@ -54,7 +61,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
.0
.into_iter()
.flat_map(|it| hir::Trait::from(it).items(ctx.sema.db))
.for_each(|item| add_assoc_item(acc, ctx, item));
.for_each(|item| add_assoc_item(acc, item));
return;
}
let resolution = match resolution {
@ -98,7 +105,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
Some(ctx.module),
None,
|item| {
add_assoc_item(acc, ctx, item);
add_assoc_item(acc, item);
None::<()>
},
);
@ -114,7 +121,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
hir::PathResolution::Def(hir::ModuleDef::Trait(t)) => {
// Handles `Trait::assoc` as well as `<Ty as Trait>::assoc`.
for item in t.items(ctx.db) {
add_assoc_item(acc, ctx, item);
add_assoc_item(acc, item);
}
}
hir::PathResolution::TypeParam(_) | hir::PathResolution::SelfType(_) => {
@ -135,7 +142,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
// We might iterate candidates of a trait multiple times here, so deduplicate
// them.
if seen.insert(item) {
add_assoc_item(acc, ctx, item);
add_assoc_item(acc, item);
}
None::<()>
},
@ -147,7 +154,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
None if is_absolute_path => acc.add_crate_roots(ctx),
None => {
acc.add_nameref_keywords_with_colon(ctx);
if let Some(ImmediateLocation::TypeBound) = &ctx.completion_location {
if let TypeLocation::TypeBound = location {
ctx.process_all_names(&mut |name, res| {
let add_resolution = match res {
ScopeDef::ModuleDef(hir::ModuleDef::Macro(mac)) => mac.is_fn_like(ctx.db),
@ -162,7 +169,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
});
return;
}
if let Some(ImmediateLocation::GenericArgList(arg_list)) = &ctx.completion_location {
if let TypeLocation::GenericArgList(Some(arg_list)) = location {
if let Some(path_seg) = arg_list.syntax().parent().and_then(ast::PathSegment::cast)
{
if path_seg.syntax().ancestors().find_map(ast::TypeBound::cast).is_some() {
@ -189,10 +196,10 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
}
pub(crate) fn complete_inferred_type(acc: &mut Completions, ctx: &CompletionContext) -> Option<()> {
let pat = match dbg!(ctx.path_context()) {
let pat = match ctx.path_context() {
Some(
ctx @ PathCompletionCtx {
kind: PathKind::Type { ascription: Some(ascription), .. },
kind: PathKind::Type { location: TypeLocation::TypeAscription(ascription), .. },
..
},
) if ctx.is_trivial_path() => ascription,
@ -211,11 +218,3 @@ pub(crate) fn complete_inferred_type(acc: &mut Completions, ctx: &CompletionCont
acc.add(render_type_inference(ty_string, ctx));
None
}
fn add_assoc_item(acc: &mut Completions, ctx: &CompletionContext, item: hir::AssocItem) {
match item {
hir::AssocItem::Const(ct) if ctx.expects_generic_arg() => acc.add_const(ctx, ct),
hir::AssocItem::Function(_) | hir::AssocItem::Const(_) => (),
hir::AssocItem::TypeAlias(ty) => acc.add_type_alias(ctx, ty),
}
}

98
crates/ide-completion/src/context.rs
View file

@ -22,10 +22,7 @@ use syntax::{
use text_edit::Indel;
use crate::{
patterns::{
determine_location, is_in_loop_body, is_in_token_of_for_loop, previous_token,
ImmediateLocation,
},
patterns::{is_in_loop_body, is_in_token_of_for_loop, previous_token},
CompletionConfig,
};
@ -102,10 +99,7 @@ pub(super) enum PathKind {
is_func_update: Option<ast::RecordExpr>,
},
Type {
in_tuple_struct: bool,
/// Whether this type path is a type ascription or not
/// Original file ast node
ascription: Option<TypeAscriptionTarget>,
location: TypeLocation,
},
Attr {
kind: AttrKind,
@ -123,6 +117,16 @@ pub(super) enum PathKind {
Use,
}
/// Original file ast nodes
#[derive(Clone, Debug, PartialEq, Eq)]
pub(crate) enum TypeLocation {
TupleField,
TypeAscription(TypeAscriptionTarget),
GenericArgList(Option<ast::GenericArgList>),
TypeBound,
Other,
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub(crate) enum TypeAscriptionTarget {
Let(Option<ast::Pat>),
@ -222,6 +226,7 @@ pub(super) enum NameKind {
pub(super) struct NameRefContext {
/// NameRef syntax in the original file
pub(super) nameref: Option<ast::NameRef>,
// FIXME: This shouldn't be an Option
pub(super) kind: Option<NameRefKind>,
}
@ -311,9 +316,9 @@ pub(crate) struct CompletionContext<'a> {
/// The parent impl of the cursor position if it exists.
pub(super) impl_def: Option<ast::Impl>,
/// Are we completing inside a let statement with a missing semicolon?
// FIXME: This should be part of PathKind::Expr
pub(super) incomplete_let: bool,
pub(super) completion_location: Option<ImmediateLocation>,
pub(super) previous_token: Option<SyntaxToken>,
pub(super) ident_ctx: IdentContext,
@ -386,11 +391,6 @@ impl<'a> CompletionContext<'a> {
self.dot_receiver().is_some()
}
// FIXME: This shouldn't exist
pub(crate) fn expects_generic_arg(&self) -> bool {
matches!(self.completion_location, Some(ImmediateLocation::GenericArgList(_)))
}
pub(crate) fn path_context(&self) -> Option<&PathCompletionCtx> {
self.nameref_ctx().and_then(|ctx| match &ctx.kind {
Some(NameRefKind::Path(path)) => Some(path),
@ -542,7 +542,6 @@ impl<'a> CompletionContext<'a> {
function_def: None,
impl_def: None,
incomplete_let: false,
completion_location: None,
previous_token: None,
// dummy value, will be overwritten
ident_ctx: IdentContext::UnexpandedAttrTT { fake_attribute_under_caret: None },
@ -935,8 +934,6 @@ impl<'a> CompletionContext<'a> {
return Some(());
}
};
self.completion_location =
determine_location(&self.sema, original_file, offset, &name_like);
self.impl_def = self
.sema
.token_ancestors_with_macros(self.token.clone())
@ -1094,7 +1091,7 @@ impl<'a> CompletionContext<'a> {
match parent {
ast::PathSegment(segment) => segment,
ast::FieldExpr(field) => {
let receiver = find_in_original_file(field.expr(), original_file);
let receiver = find_opt_node_in_file(original_file, field.expr());
let receiver_is_ambiguous_float_literal = match &receiver {
Some(ast::Expr::Literal(l)) => matches! {
l.kind(),
@ -1110,7 +1107,7 @@ impl<'a> CompletionContext<'a> {
return res;
},
ast::MethodCallExpr(method) => {
let receiver = find_in_original_file(method.receiver(), original_file);
let receiver = find_opt_node_in_file(original_file, method.receiver());
nameref_ctx.kind = Some(NameRefKind::DotAccess(DotAccess {
receiver_ty: receiver.as_ref().and_then(|it| sema.type_of_expr(it)),
kind: DotAccessKind::Method { has_parens: method.arg_list().map_or(false, |it| it.l_paren_token().is_some()) },
@ -1189,14 +1186,14 @@ impl<'a> CompletionContext<'a> {
None
};
let fetch_ascription = |it: Option<SyntaxNode>| {
let type_location = |it: Option<SyntaxNode>| {
let parent = it?;
match_ast! {
let res = match_ast! {
match parent {
ast::Const(it) => {
let name = find_in_original_file(it.name(), original_file)?;
let name = find_opt_node_in_file(original_file, it.name())?;
let original = ast::Const::cast(name.syntax().parent()?)?;
Some(TypeAscriptionTarget::Const(original.body()))
TypeLocation::TypeAscription(TypeAscriptionTarget::Const(original.body()))
},
ast::RetType(it) => {
if it.thin_arrow_token().is_none() {
@ -1207,8 +1204,8 @@ impl<'a> CompletionContext<'a> {
None => ast::ClosureExpr::cast(parent.parent()?)?.param_list(),
};
let parent = find_in_original_file(parent, original_file)?.syntax().parent()?;
Some(TypeAscriptionTarget::RetType(match_ast! {
let parent = find_opt_node_in_file(original_file, parent)?.syntax().parent()?;
TypeLocation::TypeAscription(TypeAscriptionTarget::RetType(match_ast! {
match parent {
ast::ClosureExpr(it) => {
it.body()
@ -1224,17 +1221,25 @@ impl<'a> CompletionContext<'a> {
if it.colon_token().is_none() {
return None;
}
Some(TypeAscriptionTarget::FnParam(find_in_original_file(it.pat(), original_file)))
TypeLocation::TypeAscription(TypeAscriptionTarget::FnParam(find_opt_node_in_file(original_file, it.pat())))
},
ast::LetStmt(it) => {
if it.colon_token().is_none() {
return None;
}
Some(TypeAscriptionTarget::Let(find_in_original_file(it.pat(), original_file)))
TypeLocation::TypeAscription(TypeAscriptionTarget::Let(find_opt_node_in_file(original_file, it.pat())))
},
_ => None,
ast::TypeBound(_) => TypeLocation::TypeBound,
// is this case needed?
ast::TypeBoundList(_) => TypeLocation::TypeBound,
ast::GenericArg(it) => TypeLocation::GenericArgList(find_opt_node_in_file_compensated(original_file, it.syntax().parent().and_then(ast::GenericArgList::cast))),
// is this case needed?
ast::GenericArgList(it) => TypeLocation::GenericArgList(find_opt_node_in_file_compensated(original_file, Some(it))),
ast::TupleField(_) => TypeLocation::TupleField,
_ => return None,
}
}
};
Some(res)
};
// Infer the path kind
@ -1242,10 +1247,9 @@ impl<'a> CompletionContext<'a> {
match_ast! {
match it {
ast::PathType(it) => {
let ascription = fetch_ascription(it.syntax().parent());
let location = type_location(it.syntax().parent());
Some(PathKind::Type {
in_tuple_struct: it.syntax().parent().map_or(false, |it| ast::TupleField::can_cast(it.kind())),
ascription,
location: location.unwrap_or(TypeLocation::Other),
})
},
ast::PathExpr(it) => {
@ -1292,7 +1296,12 @@ impl<'a> CompletionContext<'a> {
let parent = it.syntax().parent();
match parent.as_ref().map(|it| it.kind()) {
Some(SyntaxKind::MACRO_PAT) => Some(PathKind::Pat),
Some(SyntaxKind::MACRO_TYPE) => Some(PathKind::Type { in_tuple_struct: false, ascription: None }),
Some(SyntaxKind::MACRO_TYPE) => {
let location = type_location(parent.unwrap().parent());
Some(PathKind::Type {
location: location.unwrap_or(TypeLocation::Other),
})
},
Some(SyntaxKind::ITEM_LIST) => Some(PathKind::Item { kind: ItemListKind::Module }),
Some(SyntaxKind::ASSOC_ITEM_LIST) => Some(PathKind::Item { kind: match parent.and_then(|it| it.parent()) {
Some(it) => match_ast! {
@ -1501,15 +1510,14 @@ fn pattern_context_for(original_file: &SyntaxNode, pat: ast::Pat) -> PatternCont
}
}
fn find_in_original_file<N: AstNode>(x: Option<N>, original_file: &SyntaxNode) -> Option<N> {
fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
let range = syntax.text_range().intersect(range)?;
syntax.covering_element(range).ancestors().find_map(N::cast)
}
x.map(|e| e.syntax().text_range()).and_then(|r| find_node_with_range(original_file, r))
/// Attempts to find `node` inside `syntax` via `node`'s text range.
/// If the fake identifier has been inserted after this node or inside of this node use the `_compensated` version instead.
fn find_opt_node_in_file<N: AstNode>(syntax: &SyntaxNode, node: Option<N>) -> Option<N> {
find_node_in_file(syntax, &node?)
}
/// Attempts to find `node` inside `syntax` via `node`'s text range.
/// If the fake identifier has been inserted after this node or inside of this node use the `_compensated` version instead.
fn find_node_in_file<N: AstNode>(syntax: &SyntaxNode, node: &N) -> Option<N> {
let syntax_range = syntax.text_range();
let range = node.syntax().text_range();
@ -1528,11 +1536,21 @@ fn find_node_in_file_compensated<N: AstNode>(syntax: &SyntaxNode, node: &N) -> O
return None;
}
let range = TextRange::new(range.start(), end);
// our inserted ident could cause `range` to be go outside of the original syntax, so cap it
// our inserted ident could cause `range` to go outside of the original syntax, so cap it
let intersection = range.intersect(syntax_range)?;
syntax.covering_element(intersection).ancestors().find_map(N::cast)
}
/// Attempts to find `node` inside `syntax` via `node`'s text range while compensating
/// for the offset introduced by the fake ident..
/// This is wrong if `node` comes before the insertion point! Use `find_node_in_file` instead.
fn find_opt_node_in_file_compensated<N: AstNode>(
syntax: &SyntaxNode,
node: Option<N>,
) -> Option<N> {
find_node_in_file_compensated(syntax, &node?)
}
fn path_or_use_tree_qualifier(path: &ast::Path) -> Option<(ast::Path, bool)> {
if let Some(qual) = path.qualifier() {
return Some((qual, false));

89
crates/ide-completion/src/patterns.rs
View file

@ -4,103 +4,16 @@
//! This means we for example expand a NameRef token to its outermost Path node, as semantically these act in the same location
//! and the completions usually query for path specific things on the Path context instead. This simplifies some location handling.
use hir::Semantics;
use ide_db::RootDatabase;
use syntax::{
ast::{self, HasLoopBody},
match_ast, AstNode, SyntaxElement,
SyntaxKind::*,
SyntaxNode, SyntaxToken, TextSize,
SyntaxNode, SyntaxToken,
};
#[cfg(test)]
use crate::tests::check_pattern_is_applicable;
/// Direct parent "thing" of what we are currently completing.
///
/// This may contain nodes of the fake file as well as the original, comments on the variants specify
/// from which file the nodes are.
#[derive(Clone, Debug, PartialEq, Eq)]
pub(crate) enum ImmediateLocation {
TypeBound,
// Only set from a type arg
/// Original file ast node
GenericArgList(ast::GenericArgList),
}
pub(crate) fn determine_location(
sema: &Semantics<RootDatabase>,
original_file: &SyntaxNode,
offset: TextSize,
name_like: &ast::NameLike,
) -> Option<ImmediateLocation> {
let node = match name_like {
ast::NameLike::NameRef(name_ref) => maximize_name_ref(name_ref),
ast::NameLike::Name(name) => name.syntax().clone(),
ast::NameLike::Lifetime(lt) => lt.syntax().clone(),
};
match_ast! {
match node {
ast::TypeBoundList(_it) => return Some(ImmediateLocation::TypeBound),
_ => (),
}
};
let parent = match node.parent() {
Some(parent) => match ast::MacroCall::cast(parent.clone()) {
// When a path is being typed in an (Assoc)ItemList the parser will always emit a macro_call.
// This is usually fine as the node expansion code above already accounts for that with
// the ancestors call, but there is one exception to this which is that when an attribute
// precedes it the code above will not walk the Path to the parent MacroCall as their ranges differ.
// FIXME path expr and statement have a similar problem
Some(call)
if call.excl_token().is_none()
&& call.token_tree().is_none()
&& call.semicolon_token().is_none() =>
{
call.syntax().parent()?
}
_ => parent,
},
// SourceFile
None => return None,
};
let res = match_ast! {
match parent {
ast::TypeBound(_) => ImmediateLocation::TypeBound,
ast::TypeBoundList(_) => ImmediateLocation::TypeBound,
ast::GenericArgList(_) => sema
.find_node_at_offset_with_macros(original_file, offset)
.map(ImmediateLocation::GenericArgList)?,
_ => return None,
}
};
Some(res)
}
/// Maximize a nameref to its enclosing path if its the last segment of said path.
/// That is, when completing a [`NameRef`] we actually handle it as the path it is part of when determining
/// its location.
fn maximize_name_ref(name_ref: &ast::NameRef) -> SyntaxNode {
if let Some(segment) = name_ref.syntax().parent().and_then(ast::PathSegment::cast) {
let p = segment.parent_path();
if p.parent_path().is_none() {
// Get rid of PathExpr, PathType, etc...
let path = p
.syntax()
.ancestors()
.take_while(|it| it.text_range() == p.syntax().text_range())
.last();
if let Some(it) = path {
return it;
}
}
}
name_ref.syntax().clone()
}
pub(crate) fn previous_token(element: SyntaxElement) -> Option<SyntaxToken> {
element.into_token().and_then(previous_non_trivia_token)
}