rename completion -> ide_completion

We don't have completion-related PRs in flight, so lets do it

1 files changed, 0 insertions, 537 deletions

diff --git a/crates/completion/src/context.rs b/crates/completion/src/context.rs
deleted file mode 100644
index 3db357855..000000000
--- a/crates/completion/src/context.rs
+++ /dev/null
@@ -1,537 +0,0 @@
-//! See `CompletionContext` structure.
-
-use hir::{Local, ScopeDef, Semantics, SemanticsScope, Type};
-use ide_db::base_db::{FilePosition, SourceDatabase};
-use ide_db::{call_info::ActiveParameter, RootDatabase};
-use syntax::{
-    algo::find_node_at_offset, ast, match_ast, AstNode, NodeOrToken, SyntaxKind::*, SyntaxNode,
-    SyntaxToken, TextRange, TextSize,
-};
-use test_utils::mark;
-use text_edit::Indel;
-
-use crate::{
-    patterns::{
-        fn_is_prev, for_is_prev2, has_bind_pat_parent, has_block_expr_parent,
-        has_field_list_parent, has_impl_as_prev_sibling, has_impl_parent,
-        has_item_list_or_source_file_parent, has_ref_parent, has_trait_as_prev_sibling,
-        has_trait_parent, if_is_prev, inside_impl_trait_block, is_in_loop_body, is_match_arm,
-        unsafe_is_prev,
-    },
-    CompletionConfig,
-};
-
-/// `CompletionContext` is created early during completion to figure out, where
-/// exactly is the cursor, syntax-wise.
-#[derive(Debug)]
-pub(crate) struct CompletionContext<'a> {
-    pub(super) sema: Semantics<'a, RootDatabase>,
-    pub(super) scope: SemanticsScope<'a>,
-    pub(super) db: &'a RootDatabase,
-    pub(super) config: &'a CompletionConfig,
-    pub(super) position: FilePosition,
-    /// The token before the cursor, in the original file.
-    pub(super) original_token: SyntaxToken,
-    /// The token before the cursor, in the macro-expanded file.
-    pub(super) token: SyntaxToken,
-    pub(super) krate: Option<hir::Crate>,
-    pub(super) expected_type: Option<Type>,
-    pub(super) name_ref_syntax: Option<ast::NameRef>,
-    pub(super) function_syntax: Option<ast::Fn>,
-    pub(super) use_item_syntax: Option<ast::Use>,
-    pub(super) record_lit_syntax: Option<ast::RecordExpr>,
-    pub(super) record_pat_syntax: Option<ast::RecordPat>,
-    pub(super) record_field_syntax: Option<ast::RecordExprField>,
-    pub(super) impl_def: Option<ast::Impl>,
-    /// FIXME: `ActiveParameter` is string-based, which is very very wrong
-    pub(super) active_parameter: Option<ActiveParameter>,
-    pub(super) is_param: bool,
-    /// If a name-binding or reference to a const in a pattern.
-    /// Irrefutable patterns (like let) are excluded.
-    pub(super) is_pat_binding_or_const: bool,
-    pub(super) is_irrefutable_pat_binding: bool,
-    /// A single-indent path, like `foo`. `::foo` should not be considered a trivial path.
-    pub(super) is_trivial_path: bool,
-    /// If not a trivial path, the prefix (qualifier).
-    pub(super) path_qual: Option<ast::Path>,
-    pub(super) after_if: bool,
-    /// `true` if we are a statement or a last expr in the block.
-    pub(super) can_be_stmt: bool,
-    /// `true` if we expect an expression at the cursor position.
-    pub(super) is_expr: bool,
-    /// Something is typed at the "top" level, in module or impl/trait.
-    pub(super) is_new_item: bool,
-    /// The receiver if this is a field or method access, i.e. writing something.$0
-    pub(super) dot_receiver: Option<ast::Expr>,
-    pub(super) dot_receiver_is_ambiguous_float_literal: bool,
-    /// If this is a call (method or function) in particular, i.e. the () are already there.
-    pub(super) is_call: bool,
-    /// Like `is_call`, but for tuple patterns.
-    pub(super) is_pattern_call: bool,
-    /// If this is a macro call, i.e. the () are already there.
-    pub(super) is_macro_call: bool,
-    pub(super) is_path_type: bool,
-    pub(super) has_type_args: bool,
-    pub(super) attribute_under_caret: Option<ast::Attr>,
-    pub(super) mod_declaration_under_caret: Option<ast::Module>,
-    pub(super) unsafe_is_prev: bool,
-    pub(super) if_is_prev: bool,
-    pub(super) block_expr_parent: bool,
-    pub(super) bind_pat_parent: bool,
-    pub(super) ref_pat_parent: bool,
-    pub(super) in_loop_body: bool,
-    pub(super) has_trait_parent: bool,
-    pub(super) has_impl_parent: bool,
-    pub(super) inside_impl_trait_block: bool,
-    pub(super) has_field_list_parent: bool,
-    pub(super) trait_as_prev_sibling: bool,
-    pub(super) impl_as_prev_sibling: bool,
-    pub(super) is_match_arm: bool,
-    pub(super) has_item_list_or_source_file_parent: bool,
-    pub(super) for_is_prev2: bool,
-    pub(super) fn_is_prev: bool,
-    pub(super) incomplete_let: bool,
-    pub(super) locals: Vec<(String, Local)>,
-}
-
-impl<'a> CompletionContext<'a> {
-    pub(super) fn new(
-        db: &'a RootDatabase,
-        position: FilePosition,
-        config: &'a CompletionConfig,
-    ) -> Option<CompletionContext<'a>> {
-        let sema = Semantics::new(db);
-
-        let original_file = sema.parse(position.file_id);
-
-        // Insert a fake ident to get a valid parse tree. We will use this file
-        // to determine context, though the original_file will be used for
-        // actual completion.
-        let file_with_fake_ident = {
-            let parse = db.parse(position.file_id);
-            let edit = Indel::insert(position.offset, "intellijRulezz".to_string());
-            parse.reparse(&edit).tree()
-        };
-        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 scope = sema.scope_at_offset(&token.parent(), position.offset);
-        let mut locals = vec![];
-        scope.process_all_names(&mut |name, scope| {
-            if let ScopeDef::Local(local) = scope {
-                locals.push((name.to_string(), local));
-            }
-        });
-        let mut ctx = CompletionContext {
-            sema,
-            scope,
-            db,
-            config,
-            position,
-            original_token,
-            token,
-            krate,
-            expected_type: None,
-            name_ref_syntax: None,
-            function_syntax: None,
-            use_item_syntax: None,
-            record_lit_syntax: None,
-            record_pat_syntax: None,
-            record_field_syntax: None,
-            impl_def: None,
-            active_parameter: ActiveParameter::at(db, position),
-            is_param: false,
-            is_pat_binding_or_const: false,
-            is_irrefutable_pat_binding: false,
-            is_trivial_path: false,
-            path_qual: None,
-            after_if: false,
-            can_be_stmt: false,
-            is_expr: false,
-            is_new_item: false,
-            dot_receiver: None,
-            dot_receiver_is_ambiguous_float_literal: false,
-            is_call: false,
-            is_pattern_call: false,
-            is_macro_call: false,
-            is_path_type: false,
-            has_type_args: false,
-            attribute_under_caret: None,
-            mod_declaration_under_caret: None,
-            unsafe_is_prev: false,
-            if_is_prev: false,
-            block_expr_parent: false,
-            bind_pat_parent: false,
-            ref_pat_parent: false,
-            in_loop_body: false,
-            has_trait_parent: false,
-            has_impl_parent: false,
-            inside_impl_trait_block: false,
-            has_field_list_parent: false,
-            trait_as_prev_sibling: false,
-            impl_as_prev_sibling: false,
-            is_match_arm: false,
-            has_item_list_or_source_file_parent: false,
-            for_is_prev2: false,
-            fn_is_prev: false,
-            incomplete_let: false,
-            locals,
-        };
-
-        let mut original_file = original_file.syntax().clone();
-        let mut hypothetical_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>(&hypothetical_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;
-            }
-            let hypothetical_args = match macro_call_with_fake_ident.token_tree() {
-                Some(tt) => tt,
-                None => break,
-            };
-            if let (Some(actual_expansion), Some(hypothetical_expansion)) = (
-                ctx.sema.expand(&actual_macro_call),
-                ctx.sema.speculative_expand(
-                    &actual_macro_call,
-                    &hypothetical_args,
-                    fake_ident_token,
-                ),
-            ) {
-                let new_offset = hypothetical_expansion.1.text_range().start();
-                if new_offset > actual_expansion.text_range().end() {
-                    break;
-                }
-                original_file = actual_expansion;
-                hypothetical_file = hypothetical_expansion.0;
-                fake_ident_token = hypothetical_expansion.1;
-                offset = new_offset;
-            } else {
-                break;
-            }
-        }
-        ctx.fill_keyword_patterns(&hypothetical_file, offset);
-        ctx.fill(&original_file, hypothetical_file, offset);
-        Some(ctx)
-    }
-
-    /// Checks whether completions in that particular case don't make much sense.
-    /// Examples:
-    /// - `fn $0` -- we expect function name, it's unlikely that "hint" will be helpful.
-    ///   Exception for this case is `impl Trait for Foo`, where we would like to hint trait method names.
-    /// - `for _ i$0` -- obviously, it'll be "in" keyword.
-    pub(crate) fn no_completion_required(&self) -> bool {
-        (self.fn_is_prev && !self.inside_impl_trait_block) || self.for_is_prev2
-    }
-
-    /// The range of the identifier that is being completed.
-    pub(crate) fn source_range(&self) -> TextRange {
-        // check kind of macro-expanded token, but use range of original token
-        let kind = self.token.kind();
-        if kind == IDENT || kind == UNDERSCORE || kind.is_keyword() {
-            mark::hit!(completes_if_prefix_is_keyword);
-            self.original_token.text_range()
-        } else {
-            TextRange::empty(self.position.offset)
-        }
-    }
-
-    fn fill_keyword_patterns(&mut self, file_with_fake_ident: &SyntaxNode, offset: TextSize) {
-        let fake_ident_token = file_with_fake_ident.token_at_offset(offset).right_biased().unwrap();
-        let syntax_element = NodeOrToken::Token(fake_ident_token);
-        self.block_expr_parent = has_block_expr_parent(syntax_element.clone());
-        self.unsafe_is_prev = unsafe_is_prev(syntax_element.clone());
-        self.if_is_prev = if_is_prev(syntax_element.clone());
-        self.bind_pat_parent = has_bind_pat_parent(syntax_element.clone());
-        self.ref_pat_parent = has_ref_parent(syntax_element.clone());
-        self.in_loop_body = is_in_loop_body(syntax_element.clone());
-        self.has_trait_parent = has_trait_parent(syntax_element.clone());
-        self.has_impl_parent = has_impl_parent(syntax_element.clone());
-        self.inside_impl_trait_block = inside_impl_trait_block(syntax_element.clone());
-        self.has_field_list_parent = has_field_list_parent(syntax_element.clone());
-        self.impl_as_prev_sibling = has_impl_as_prev_sibling(syntax_element.clone());
-        self.trait_as_prev_sibling = has_trait_as_prev_sibling(syntax_element.clone());
-        self.is_match_arm = is_match_arm(syntax_element.clone());
-        self.has_item_list_or_source_file_parent =
-            has_item_list_or_source_file_parent(syntax_element.clone());
-        self.mod_declaration_under_caret =
-            find_node_at_offset::<ast::Module>(&file_with_fake_ident, offset)
-                .filter(|module| module.item_list().is_none());
-        self.for_is_prev2 = for_is_prev2(syntax_element.clone());
-        self.fn_is_prev = fn_is_prev(syntax_element.clone());
-        self.incomplete_let =
-            syntax_element.ancestors().take(6).find_map(ast::LetStmt::cast).map_or(false, |it| {
-                it.syntax().text_range().end() == syntax_element.text_range().end()
-            });
-    }
-
-    fn fill_impl_def(&mut self) {
-        self.impl_def = self
-            .sema
-            .ancestors_with_macros(self.token.parent())
-            .take_while(|it| it.kind() != SOURCE_FILE && it.kind() != MODULE)
-            .find_map(ast::Impl::cast);
-    }
-
-    fn fill(
-        &mut self,
-        original_file: &SyntaxNode,
-        file_with_fake_ident: SyntaxNode,
-        offset: TextSize,
-    ) {
-        // FIXME: this is wrong in at least two cases:
-        //  * when there's no token `foo($0)`
-        //  * when there is a token, but it happens to have type of it's own
-        self.expected_type = self
-            .token
-            .ancestors()
-            .find_map(|node| {
-                let ty = match_ast! {
-                    match node {
-                        ast::Pat(it) => self.sema.type_of_pat(&it),
-                        ast::Expr(it) => self.sema.type_of_expr(&it),
-                        _ => return None,
-                    }
-                };
-                Some(ty)
-            })
-            .flatten();
-        self.attribute_under_caret = find_node_at_offset(&file_with_fake_ident, offset);
-
-        // First, let's try to complete a reference to some declaration.
-        if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(&file_with_fake_ident, offset) {
-            // Special case, `trait T { fn foo(i_am_a_name_ref) {} }`.
-            // See RFC#1685.
-            if is_node::<ast::Param>(name_ref.syntax()) {
-                self.is_param = true;
-                return;
-            }
-            // FIXME: remove this (V) duplication and make the check more precise
-            if name_ref.syntax().ancestors().find_map(ast::RecordPatFieldList::cast).is_some() {
-                self.record_pat_syntax =
-                    self.sema.find_node_at_offset_with_macros(&original_file, offset);
-            }
-            self.classify_name_ref(original_file, name_ref, offset);
-        }
-
-        // Otherwise, see if this is a declaration. We can use heuristics to
-        // suggest declaration names, see `CompletionKind::Magic`.
-        if let Some(name) = find_node_at_offset::<ast::Name>(&file_with_fake_ident, offset) {
-            if let Some(bind_pat) = name.syntax().ancestors().find_map(ast::IdentPat::cast) {
-                self.is_pat_binding_or_const = true;
-                if bind_pat.at_token().is_some()
-                    || bind_pat.ref_token().is_some()
-                    || bind_pat.mut_token().is_some()
-                {
-                    self.is_pat_binding_or_const = false;
-                }
-                if bind_pat.syntax().parent().and_then(ast::RecordPatFieldList::cast).is_some() {
-                    self.is_pat_binding_or_const = false;
-                }
-                if let Some(Some(pat)) = bind_pat.syntax().ancestors().find_map(|node| {
-                    match_ast! {
-                        match node {
-                            ast::LetStmt(it) => Some(it.pat()),
-                            ast::Param(it) => Some(it.pat()),
-                            _ => None,
-                        }
-                    }
-                }) {
-                    if pat.syntax().text_range().contains_range(bind_pat.syntax().text_range()) {
-                        self.is_pat_binding_or_const = false;
-                        self.is_irrefutable_pat_binding = true;
-                    }
-                }
-
-                self.fill_impl_def();
-            }
-            if is_node::<ast::Param>(name.syntax()) {
-                self.is_param = true;
-                return;
-            }
-            // FIXME: remove this (^) duplication and make the check more precise
-            if name.syntax().ancestors().find_map(ast::RecordPatFieldList::cast).is_some() {
-                self.record_pat_syntax =
-                    self.sema.find_node_at_offset_with_macros(&original_file, offset);
-            }
-        }
-    }
-
-    fn classify_name_ref(
-        &mut self,
-        original_file: &SyntaxNode,
-        name_ref: ast::NameRef,
-        offset: TextSize,
-    ) {
-        self.name_ref_syntax =
-            find_node_at_offset(&original_file, name_ref.syntax().text_range().start());
-        let name_range = name_ref.syntax().text_range();
-        if ast::RecordExprField::for_field_name(&name_ref).is_some() {
-            self.record_lit_syntax =
-                self.sema.find_node_at_offset_with_macros(&original_file, offset);
-        }
-
-        self.fill_impl_def();
-
-        let top_node = name_ref
-            .syntax()
-            .ancestors()
-            .take_while(|it| it.text_range() == name_range)
-            .last()
-            .unwrap();
-
-        match top_node.parent().map(|it| it.kind()) {
-            Some(SOURCE_FILE) | Some(ITEM_LIST) => {
-                self.is_new_item = true;
-                return;
-            }
-            _ => (),
-        }
-
-        self.use_item_syntax =
-            self.sema.ancestors_with_macros(self.token.parent()).find_map(ast::Use::cast);
-
-        self.function_syntax = self
-            .sema
-            .ancestors_with_macros(self.token.parent())
-            .take_while(|it| it.kind() != SOURCE_FILE && it.kind() != MODULE)
-            .find_map(ast::Fn::cast);
-
-        self.record_field_syntax = self
-            .sema
-            .ancestors_with_macros(self.token.parent())
-            .take_while(|it| {
-                it.kind() != SOURCE_FILE && it.kind() != MODULE && it.kind() != CALL_EXPR
-            })
-            .find_map(ast::RecordExprField::cast);
-
-        let parent = match name_ref.syntax().parent() {
-            Some(it) => it,
-            None => return,
-        };
-
-        if let Some(segment) = ast::PathSegment::cast(parent.clone()) {
-            let path = segment.parent_path();
-            self.is_call = path
-                .syntax()
-                .parent()
-                .and_then(ast::PathExpr::cast)
-                .and_then(|it| it.syntax().parent().and_then(ast::CallExpr::cast))
-                .is_some();
-            self.is_macro_call = path.syntax().parent().and_then(ast::MacroCall::cast).is_some();
-            self.is_pattern_call =
-                path.syntax().parent().and_then(ast::TupleStructPat::cast).is_some();
-
-            self.is_path_type = path.syntax().parent().and_then(ast::PathType::cast).is_some();
-            self.has_type_args = segment.generic_arg_list().is_some();
-
-            if let Some(path) = path_or_use_tree_qualifier(&path) {
-                self.path_qual = path
-                    .segment()
-                    .and_then(|it| {
-                        find_node_with_range::<ast::PathSegment>(
-                            original_file,
-                            it.syntax().text_range(),
-                        )
-                    })
-                    .map(|it| it.parent_path());
-                return;
-            }
-
-            if let Some(segment) = path.segment() {
-                if segment.coloncolon_token().is_some() {
-                    return;
-                }
-            }
-
-            self.is_trivial_path = true;
-
-            // Find either enclosing expr statement (thing with `;`) or a
-            // block. If block, check that we are the last expr.
-            self.can_be_stmt = name_ref
-                .syntax()
-                .ancestors()
-                .find_map(|node| {
-                    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) {
-                        return Some(
-                            block.tail_expr().map(|e| e.syntax().text_range())
-                                == Some(name_ref.syntax().text_range()),
-                        );
-                    }
-                    None
-                })
-                .unwrap_or(false);
-            self.is_expr = path.syntax().parent().and_then(ast::PathExpr::cast).is_some();
-
-            if let Some(off) = name_ref.syntax().text_range().start().checked_sub(2.into()) {
-                if let Some(if_expr) =
-                    self.sema.find_node_at_offset_with_macros::<ast::IfExpr>(original_file, off)
-                {
-                    if if_expr.syntax().text_range().end() < name_ref.syntax().text_range().start()
-                    {
-                        self.after_if = true;
-                    }
-                }
-            }
-        }
-        if let Some(field_expr) = ast::FieldExpr::cast(parent.clone()) {
-            // The receiver comes before the point of insertion of the fake
-            // ident, so it should have the same range in the non-modified file
-            self.dot_receiver = field_expr
-                .expr()
-                .map(|e| e.syntax().text_range())
-                .and_then(|r| find_node_with_range(original_file, r));
-            self.dot_receiver_is_ambiguous_float_literal =
-                if let Some(ast::Expr::Literal(l)) = &self.dot_receiver {
-                    match l.kind() {
-                        ast::LiteralKind::FloatNumber { .. } => l.token().text().ends_with('.'),
-                        _ => false,
-                    }
-                } else {
-                    false
-                };
-        }
-        if let Some(method_call_expr) = ast::MethodCallExpr::cast(parent) {
-            // As above
-            self.dot_receiver = method_call_expr
-                .receiver()
-                .map(|e| e.syntax().text_range())
-                .and_then(|r| find_node_with_range(original_file, r));
-            self.is_call = true;
-        }
-    }
-}
-
-fn find_node_with_range<N: AstNode>(syntax: &SyntaxNode, range: TextRange) -> Option<N> {
-    syntax.covering_element(range).ancestors().find_map(N::cast)
-}
-
-fn is_node<N: AstNode>(node: &SyntaxNode) -> bool {
-    match node.ancestors().find_map(N::cast) {
-        None => false,
-        Some(n) => n.syntax().text_range() == node.text_range(),
-    }
-}
-
-fn path_or_use_tree_qualifier(path: &ast::Path) -> Option<ast::Path> {
-    if let Some(qual) = path.qualifier() {
-        return Some(qual);
-    }
-    let use_tree_list = path.syntax().ancestors().find_map(ast::UseTreeList::cast)?;
-    let use_tree = use_tree_list.syntax().parent().and_then(ast::UseTree::cast)?;
-    use_tree.path()
-}