};
use syntax::{
algo::find_node_at_offset,
- ast::{self, NameOrNameRef, NameOwner},
+ ast::{self, HasName, NameOrNameRef},
match_ast, AstNode, NodeOrToken,
SyntaxKind::{self, *},
SyntaxNode, SyntaxToken, TextRange, TextSize, T,
pub(super) is_param: Option<ParamKind>,
}
+#[derive(Debug)]
+pub(super) enum LifetimeContext {
+ LifetimeParam(Option<ast::LifetimeParam>),
+ Lifetime,
+ LabelRef,
+ LabelDef,
+}
+
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub(crate) enum CallKind {
Pat,
pub(super) original_token: SyntaxToken,
/// The token before the cursor, in the macro-expanded file.
pub(super) token: SyntaxToken,
+ /// The crate of the current file.
pub(super) krate: Option<hir::Crate>,
pub(super) expected_name: Option<NameOrNameRef>,
pub(super) expected_type: Option<Type>,
pub(super) function_def: Option<ast::Fn>,
/// The parent impl of the cursor position if it exists.
pub(super) impl_def: Option<ast::Impl>,
- pub(super) name_ref_syntax: Option<ast::NameRef>,
-
- // potentially set if we are completing a lifetime
- pub(super) lifetime_syntax: Option<ast::Lifetime>,
- pub(super) lifetime_param_syntax: Option<ast::LifetimeParam>,
- pub(super) lifetime_allowed: bool,
- pub(super) is_label_ref: bool,
+ pub(super) name_syntax: Option<ast::NameLike>,
pub(super) completion_location: Option<ImmediateLocation>,
pub(super) prev_sibling: Option<ImmediatePrevSibling>,
pub(super) attribute_under_caret: Option<ast::Attr>,
pub(super) previous_token: Option<SyntaxToken>,
+ pub(super) lifetime_ctx: Option<LifetimeContext>,
pub(super) pattern_ctx: Option<PatternContext>,
pub(super) path_context: Option<PathCompletionContext>,
- pub(super) active_parameter: Option<ActiveParameter>,
pub(super) locals: Vec<(String, Local)>,
pub(super) incomplete_let: bool,
let fake_ident_token =
file_with_fake_ident.syntax().token_at_offset(position.offset).right_biased().unwrap();
- let krate = sema.to_module_def(position.file_id).map(|m| m.krate());
let original_token =
original_file.syntax().token_at_offset(position.offset).left_biased()?;
- let token = sema.descend_into_macros(original_token.clone());
+ let token = sema.descend_into_macros_single(original_token.clone());
let scope = sema.scope_at_offset(&token, position.offset);
+ let krate = scope.krate();
let mut locals = vec![];
scope.process_all_names(&mut |name, scope| {
if let ScopeDef::Local(local) = scope {
expected_type: None,
function_def: None,
impl_def: None,
- name_ref_syntax: None,
- lifetime_syntax: None,
- lifetime_param_syntax: None,
- lifetime_allowed: false,
- is_label_ref: false,
+ name_syntax: None,
+ lifetime_ctx: None,
pattern_ctx: None,
completion_location: None,
prev_sibling: None,
attribute_under_caret: None,
previous_token: None,
path_context: None,
- active_parameter: ActiveParameter::at(db, position),
locals,
incomplete_let: false,
no_completion_required: false,
};
+ ctx.expand_and_fill(
+ original_file.syntax().clone(),
+ file_with_fake_ident.syntax().clone(),
+ position.offset,
+ fake_ident_token,
+ );
+ Some(ctx)
+ }
- let mut original_file = original_file.syntax().clone();
- let mut speculative_file = file_with_fake_ident.syntax().clone();
- let mut offset = position.offset;
- let mut fake_ident_token = fake_ident_token;
-
- // Are we inside a macro call?
- while let (Some(actual_macro_call), Some(macro_call_with_fake_ident)) = (
- find_node_at_offset::<ast::MacroCall>(&original_file, offset),
- find_node_at_offset::<ast::MacroCall>(&speculative_file, offset),
- ) {
- if actual_macro_call.path().as_ref().map(|s| s.syntax().text())
- != macro_call_with_fake_ident.path().as_ref().map(|s| s.syntax().text())
- {
- break;
+ /// Do the attribute expansion at the current cursor position for both original file and fake file
+ /// as long as possible. As soon as one of the two expansions fail we stop to stay in sync.
+ fn expand_and_fill(
+ &mut self,
+ mut original_file: SyntaxNode,
+ mut speculative_file: SyntaxNode,
+ mut offset: TextSize,
+ mut fake_ident_token: SyntaxToken,
+ ) {
+ loop {
+ // Expand attributes
+ if let (Some(actual_item), Some(item_with_fake_ident)) = (
+ find_node_at_offset::<ast::Item>(&original_file, offset),
+ find_node_at_offset::<ast::Item>(&speculative_file, offset),
+ ) {
+ match (
+ self.sema.expand_attr_macro(&actual_item),
+ self.sema.speculative_expand_attr_macro(
+ &actual_item,
+ &item_with_fake_ident,
+ fake_ident_token.clone(),
+ ),
+ ) {
+ (Some(actual_expansion), Some(speculative_expansion)) => {
+ let new_offset = speculative_expansion.1.text_range().start();
+ if new_offset > actual_expansion.text_range().end() {
+ break;
+ }
+ original_file = actual_expansion;
+ speculative_file = speculative_expansion.0;
+ fake_ident_token = speculative_expansion.1;
+ offset = new_offset;
+ continue;
+ }
+ (None, None) => (),
+ _ => break,
+ }
}
- let speculative_args = match macro_call_with_fake_ident.token_tree() {
- Some(tt) => tt,
- None => break,
- };
- if let (Some(actual_expansion), Some(speculative_expansion)) = (
- ctx.sema.expand(&actual_macro_call),
- ctx.sema.speculative_expand(
- &actual_macro_call,
- &speculative_args,
- fake_ident_token,
- ),
+
+ // Expand fn-like macro calls
+ if let (Some(actual_macro_call), Some(macro_call_with_fake_ident)) = (
+ find_node_at_offset::<ast::MacroCall>(&original_file, offset),
+ find_node_at_offset::<ast::MacroCall>(&speculative_file, offset),
) {
- let new_offset = speculative_expansion.1.text_range().start();
- if new_offset > actual_expansion.text_range().end() {
+ let mac_call_path0 = actual_macro_call.path().as_ref().map(|s| s.syntax().text());
+ let mac_call_path1 =
+ macro_call_with_fake_ident.path().as_ref().map(|s| s.syntax().text());
+ if mac_call_path0 != mac_call_path1 {
+ break;
+ }
+ let speculative_args = match macro_call_with_fake_ident.token_tree() {
+ Some(tt) => tt,
+ None => break,
+ };
+
+ if let (Some(actual_expansion), Some(speculative_expansion)) = (
+ self.sema.expand(&actual_macro_call),
+ self.sema.speculative_expand(
+ &actual_macro_call,
+ &speculative_args,
+ fake_ident_token,
+ ),
+ ) {
+ let new_offset = speculative_expansion.1.text_range().start();
+ if new_offset > actual_expansion.text_range().end() {
+ break;
+ }
+ original_file = actual_expansion;
+ speculative_file = speculative_expansion.0;
+ fake_ident_token = speculative_expansion.1;
+ offset = new_offset;
+ } else {
break;
}
- original_file = actual_expansion;
- speculative_file = speculative_expansion.0;
- fake_ident_token = speculative_expansion.1;
- offset = new_offset;
} else {
break;
}
}
- ctx.fill(&original_file, speculative_file, offset);
- Some(ctx)
+
+ self.fill(&original_file, speculative_file, offset);
}
/// Checks whether completions in that particular case don't make much sense.
let kind = self.token.kind();
if kind == IDENT || kind == LIFETIME_IDENT || kind == UNDERSCORE || kind.is_keyword() {
cov_mark::hit!(completes_if_prefix_is_keyword);
- return self.original_token.text_range();
+ self.original_token.text_range()
} else if kind == CHAR {
// assume we are completing a lifetime but the user has only typed the '
cov_mark::hit!(completes_if_lifetime_without_idents);
- return TextRange::at(self.original_token.text_range().start(), TextSize::from(1));
- } else if kind == BANG {
- if let Some(n) = self.token.parent() {
- if n.kind() == SyntaxKind::MACRO_CALL {
- cov_mark::hit!(completes_macro_call_if_cursor_at_bang_token);
- return n.text_range();
- }
- }
+ TextRange::at(self.original_token.text_range().start(), TextSize::from(1))
+ } else {
+ TextRange::empty(self.position.offset)
}
-
- TextRange::empty(self.position.offset)
}
pub(crate) fn previous_token_is(&self, kind: SyntaxKind) -> bool {
self.previous_token.as_ref().map_or(false, |tok| tok.kind() == kind)
}
- pub(crate) fn expects_assoc_item(&self) -> bool {
- matches!(self.completion_location, Some(ImmediateLocation::Trait | ImmediateLocation::Impl))
+ pub(crate) fn dot_receiver(&self) -> Option<&ast::Expr> {
+ match &self.completion_location {
+ Some(
+ ImmediateLocation::MethodCall { receiver, .. }
+ | ImmediateLocation::FieldAccess { receiver, .. },
+ ) => receiver.as_ref(),
+ _ => None,
+ }
}
pub(crate) fn has_dot_receiver(&self) -> bool {
)
}
- pub(crate) fn dot_receiver(&self) -> Option<&ast::Expr> {
- match &self.completion_location {
- Some(
- ImmediateLocation::MethodCall { receiver, .. }
- | ImmediateLocation::FieldAccess { receiver, .. },
- ) => receiver.as_ref(),
- _ => None,
- }
+ pub(crate) fn expects_assoc_item(&self) -> bool {
+ matches!(self.completion_location, Some(ImmediateLocation::Trait | ImmediateLocation::Impl))
}
pub(crate) fn expects_non_trait_assoc_item(&self) -> bool {
}
pub(crate) fn has_block_expr_parent(&self) -> bool {
- matches!(self.completion_location, Some(ImmediateLocation::BlockExpr))
+ matches!(self.completion_location, Some(ImmediateLocation::StmtList))
}
pub(crate) fn expects_ident_pat_or_ref_expr(&self) -> bool {
| ImmediateLocation::ModDeclaration(_)
| ImmediateLocation::RecordPat(_)
| ImmediateLocation::RecordExpr(_)
+ | ImmediateLocation::Rename
)
)
}
false
}
+ /// Check if an item is `#[doc(hidden)]`.
pub(crate) fn is_item_hidden(&self, item: &hir::ItemInNs) -> bool {
let attrs = item.attrs(self.db);
let krate = item.krate(self.db);
}
}
+ pub(crate) fn is_immediately_after_macro_bang(&self) -> bool {
+ self.token.kind() == BANG && self.token.parent().map_or(false, |it| it.kind() == MACRO_CALL)
+ }
+
/// A version of [`SemanticsScope::process_all_names`] that filters out `#[doc(hidden)]` items.
pub(crate) fn process_all_names(&self, f: &mut dyn FnMut(Name, ScopeDef)) {
self.scope.process_all_names(&mut |name, def| {
}
fn is_doc_hidden(&self, attrs: &hir::Attrs, defining_crate: hir::Crate) -> bool {
- let module = match self.scope.module() {
+ let krate = match self.krate {
Some(it) => it,
None => return true,
};
- if module.krate() != defining_crate && attrs.has_doc_hidden() {
+ if krate != defining_crate && attrs.has_doc_hidden() {
// `doc(hidden)` items are only completed within the defining crate.
return true;
}
.and_then(|pat| self.sema.type_of_pat(&pat))
.or_else(|| it.initializer().and_then(|it| self.sema.type_of_expr(&it)))
.map(TypeInfo::original);
- let name = if let Some(ast::Pat::IdentPat(ident)) = it.pat() {
- ident.name().map(NameOrNameRef::Name)
- } else {
- None
+ let name = match it.pat() {
+ Some(ast::Pat::IdentPat(ident)) => ident.name().map(NameOrNameRef::Name),
+ Some(_) | None => None,
};
(ty, name)
self.completion_location =
determine_location(&self.sema, original_file, offset, &name_like);
self.prev_sibling = determine_prev_sibling(&name_like);
+ self.name_syntax =
+ find_node_at_offset(original_file, name_like.syntax().text_range().start());
match name_like {
ast::NameLike::Lifetime(lifetime) => {
self.classify_lifetime(original_file, lifetime, offset);
lifetime: ast::Lifetime,
offset: TextSize,
) {
- self.lifetime_syntax =
- find_node_at_offset(original_file, lifetime.syntax().text_range().start());
if let Some(parent) = lifetime.syntax().parent() {
if parent.kind() == ERROR {
return;
}
- match_ast! {
+ self.lifetime_ctx = Some(match_ast! {
match parent {
- ast::LifetimeParam(_it) => {
- self.lifetime_allowed = true;
- self.lifetime_param_syntax =
- self.sema.find_node_at_offset_with_macros(original_file, offset);
- },
- ast::BreakExpr(_it) => self.is_label_ref = true,
- ast::ContinueExpr(_it) => self.is_label_ref = true,
- ast::Label(_it) => (),
- _ => self.lifetime_allowed = true,
+ ast::LifetimeParam(_it) => LifetimeContext::LifetimeParam(self.sema.find_node_at_offset_with_macros(original_file, offset)),
+ ast::BreakExpr(_it) => LifetimeContext::LabelRef,
+ ast::ContinueExpr(_it) => LifetimeContext::LabelRef,
+ ast::Label(_it) => LifetimeContext::LabelDef,
+ _ => LifetimeContext::Lifetime,
}
- }
+ });
}
}
fn classify_name_ref(&mut self, original_file: &SyntaxNode, name_ref: ast::NameRef) {
self.fill_impl_def();
- self.name_ref_syntax =
- find_node_at_offset(original_file, name_ref.syntax().text_range().start());
-
self.function_def = self
.sema
.token_ancestors_with_macros(self.token.clone())
if let Some(stmt) = ast::ExprStmt::cast(node.clone()) {
return Some(stmt.syntax().text_range() == name_ref.syntax().text_range());
}
- if let Some(block) = ast::BlockExpr::cast(node) {
+ if let Some(stmt_list) = ast::StmtList::cast(node) {
return Some(
- block.tail_expr().map(|e| e.syntax().text_range())
+ stmt_list.tail_expr().map(|e| e.syntax().text_range())
== Some(name_ref.syntax().text_range()),
);
}
fn check_expected_type_and_name(ra_fixture: &str, expect: Expect) {
let (db, pos) = position(ra_fixture);
- let completion_context = CompletionContext::new(&db, pos, &TEST_CONFIG).unwrap();
+ let config = TEST_CONFIG;
+ let completion_context = CompletionContext::new(&db, pos, &config).unwrap();
let ty = completion_context
.expected_type
projects / rust.git / blobdiff