From 1b0c7701cc97cd7bef8bb9729011d4cf291a60c5 Mon Sep 17 00:00:00 2001 From: Aleksey Kladov Date: Thu, 13 Aug 2020 17:42:52 +0200 Subject: Rename ra_ide -> ide --- crates/ide/src/completion/complete_attribute.rs | 644 ++++++++++++++++++++++++ 1 file changed, 644 insertions(+) create mode 100644 crates/ide/src/completion/complete_attribute.rs (limited to 'crates/ide/src/completion/complete_attribute.rs') diff --git a/crates/ide/src/completion/complete_attribute.rs b/crates/ide/src/completion/complete_attribute.rs new file mode 100644 index 000000000..603d935de --- /dev/null +++ b/crates/ide/src/completion/complete_attribute.rs @@ -0,0 +1,644 @@ +//! Completion for attributes +//! +//! This module uses a bit of static metadata to provide completions +//! for built-in attributes. + +use rustc_hash::FxHashSet; +use syntax::{ast, AstNode, SyntaxKind}; + +use crate::completion::{ + completion_context::CompletionContext, + completion_item::{CompletionItem, CompletionItemKind, CompletionKind, Completions}, +}; + +pub(super) fn complete_attribute(acc: &mut Completions, ctx: &CompletionContext) -> Option<()> { + let attribute = ctx.attribute_under_caret.as_ref()?; + match (attribute.path(), attribute.token_tree()) { + (Some(path), Some(token_tree)) if path.to_string() == "derive" => { + complete_derive(acc, ctx, token_tree) + } + (Some(path), Some(token_tree)) + if ["allow", "warn", "deny", "forbid"] + .iter() + .any(|lint_level| lint_level == &path.to_string()) => + { + complete_lint(acc, ctx, token_tree) + } + (_, Some(_token_tree)) => {} + _ => complete_attribute_start(acc, ctx, attribute), + } + Some(()) +} + +fn complete_attribute_start(acc: &mut Completions, ctx: &CompletionContext, attribute: &ast::Attr) { + for attr_completion in ATTRIBUTES { + let mut item = CompletionItem::new( + CompletionKind::Attribute, + ctx.source_range(), + attr_completion.label, + ) + .kind(CompletionItemKind::Attribute); + + if let Some(lookup) = attr_completion.lookup { + item = item.lookup_by(lookup); + } + + match (attr_completion.snippet, ctx.config.snippet_cap) { + (Some(snippet), Some(cap)) => { + item = item.insert_snippet(cap, snippet); + } + _ => {} + } + + if attribute.kind() == ast::AttrKind::Inner || !attr_completion.prefer_inner { + acc.add(item); + } + } +} + +struct AttrCompletion { + label: &'static str, + lookup: Option<&'static str>, + snippet: Option<&'static str>, + prefer_inner: bool, +} + +impl AttrCompletion { + const fn prefer_inner(self) -> AttrCompletion { + AttrCompletion { prefer_inner: true, ..self } + } +} + +const fn attr( + label: &'static str, + lookup: Option<&'static str>, + snippet: Option<&'static str>, +) -> AttrCompletion { + AttrCompletion { label, lookup, snippet, prefer_inner: false } +} + +const ATTRIBUTES: &[AttrCompletion] = &[ + attr("allow(…)", Some("allow"), Some("allow(${0:lint})")), + attr("cfg_attr(…)", Some("cfg_attr"), Some("cfg_attr(${1:predicate}, ${0:attr})")), + attr("cfg(…)", Some("cfg"), Some("cfg(${0:predicate})")), + attr("deny(…)", Some("deny"), Some("deny(${0:lint})")), + attr(r#"deprecated = "…""#, Some("deprecated"), Some(r#"deprecated = "${0:reason}""#)), + attr("derive(…)", Some("derive"), Some(r#"derive(${0:Debug})"#)), + attr(r#"doc = "…""#, Some("doc"), Some(r#"doc = "${0:docs}""#)), + attr("feature(…)", Some("feature"), Some("feature(${0:flag})")).prefer_inner(), + attr("forbid(…)", Some("forbid"), Some("forbid(${0:lint})")), + // FIXME: resolve through macro resolution? + attr("global_allocator", None, None).prefer_inner(), + attr(r#"ignore = "…""#, Some("ignore"), Some(r#"ignore = "${0:reason}""#)), + attr("inline(…)", Some("inline"), Some("inline(${0:lint})")), + attr(r#"link_name = "…""#, Some("link_name"), Some(r#"link_name = "${0:symbol_name}""#)), + attr("link", None, None), + attr("macro_export", None, None), + attr("macro_use", None, None), + attr(r#"must_use = "…""#, Some("must_use"), Some(r#"must_use = "${0:reason}""#)), + attr("no_mangle", None, None), + attr("no_std", None, None).prefer_inner(), + attr("non_exhaustive", None, None), + attr("panic_handler", None, None).prefer_inner(), + attr("path = \"…\"", Some("path"), Some("path =\"${0:path}\"")), + attr("proc_macro", None, None), + attr("proc_macro_attribute", None, None), + attr("proc_macro_derive(…)", Some("proc_macro_derive"), Some("proc_macro_derive(${0:Trait})")), + attr("recursion_limit = …", Some("recursion_limit"), Some("recursion_limit = ${0:128}")) + .prefer_inner(), + attr("repr(…)", Some("repr"), Some("repr(${0:C})")), + attr( + "should_panic(…)", + Some("should_panic"), + Some(r#"should_panic(expected = "${0:reason}")"#), + ), + attr( + r#"target_feature = "…""#, + Some("target_feature"), + Some("target_feature = \"${0:feature}\""), + ), + attr("test", None, None), + attr("used", None, None), + attr("warn(…)", Some("warn"), Some("warn(${0:lint})")), + attr( + r#"windows_subsystem = "…""#, + Some("windows_subsystem"), + Some(r#"windows_subsystem = "${0:subsystem}""#), + ) + .prefer_inner(), +]; + +fn complete_derive(acc: &mut Completions, ctx: &CompletionContext, derive_input: ast::TokenTree) { + if let Ok(existing_derives) = parse_comma_sep_input(derive_input) { + for derive_completion in DEFAULT_DERIVE_COMPLETIONS + .into_iter() + .filter(|completion| !existing_derives.contains(completion.label)) + { + let mut label = derive_completion.label.to_owned(); + for dependency in derive_completion + .dependencies + .into_iter() + .filter(|&&dependency| !existing_derives.contains(dependency)) + { + label.push_str(", "); + label.push_str(dependency); + } + acc.add( + CompletionItem::new(CompletionKind::Attribute, ctx.source_range(), label) + .kind(CompletionItemKind::Attribute), + ); + } + + for custom_derive_name in get_derive_names_in_scope(ctx).difference(&existing_derives) { + acc.add( + CompletionItem::new( + CompletionKind::Attribute, + ctx.source_range(), + custom_derive_name, + ) + .kind(CompletionItemKind::Attribute), + ); + } + } +} + +fn complete_lint(acc: &mut Completions, ctx: &CompletionContext, derive_input: ast::TokenTree) { + if let Ok(existing_lints) = parse_comma_sep_input(derive_input) { + for lint_completion in DEFAULT_LINT_COMPLETIONS + .into_iter() + .filter(|completion| !existing_lints.contains(completion.label)) + { + acc.add( + CompletionItem::new( + CompletionKind::Attribute, + ctx.source_range(), + lint_completion.label, + ) + .kind(CompletionItemKind::Attribute) + .detail(lint_completion.description), + ); + } + } +} + +fn parse_comma_sep_input(derive_input: ast::TokenTree) -> Result, ()> { + match (derive_input.left_delimiter_token(), derive_input.right_delimiter_token()) { + (Some(left_paren), Some(right_paren)) + if left_paren.kind() == SyntaxKind::L_PAREN + && right_paren.kind() == SyntaxKind::R_PAREN => + { + let mut input_derives = FxHashSet::default(); + let mut current_derive = String::new(); + for token in derive_input + .syntax() + .children_with_tokens() + .filter_map(|token| token.into_token()) + .skip_while(|token| token != &left_paren) + .skip(1) + .take_while(|token| token != &right_paren) + { + if SyntaxKind::COMMA == token.kind() { + if !current_derive.is_empty() { + input_derives.insert(current_derive); + current_derive = String::new(); + } + } else { + current_derive.push_str(token.to_string().trim()); + } + } + + if !current_derive.is_empty() { + input_derives.insert(current_derive); + } + Ok(input_derives) + } + _ => Err(()), + } +} + +fn get_derive_names_in_scope(ctx: &CompletionContext) -> FxHashSet { + let mut result = FxHashSet::default(); + ctx.scope.process_all_names(&mut |name, scope_def| { + if let hir::ScopeDef::MacroDef(mac) = scope_def { + if mac.is_derive_macro() { + result.insert(name.to_string()); + } + } + }); + result +} + +struct DeriveCompletion { + label: &'static str, + dependencies: &'static [&'static str], +} + +/// Standard Rust derives and the information about their dependencies +/// (the dependencies are needed so that the main derive don't break the compilation when added) +#[rustfmt::skip] +const DEFAULT_DERIVE_COMPLETIONS: &[DeriveCompletion] = &[ + DeriveCompletion { label: "Clone", dependencies: &[] }, + DeriveCompletion { label: "Copy", dependencies: &["Clone"] }, + DeriveCompletion { label: "Debug", dependencies: &[] }, + DeriveCompletion { label: "Default", dependencies: &[] }, + DeriveCompletion { label: "Hash", dependencies: &[] }, + DeriveCompletion { label: "PartialEq", dependencies: &[] }, + DeriveCompletion { label: "Eq", dependencies: &["PartialEq"] }, + DeriveCompletion { label: "PartialOrd", dependencies: &["PartialEq"] }, + DeriveCompletion { label: "Ord", dependencies: &["PartialOrd", "Eq", "PartialEq"] }, +]; + +struct LintCompletion { + label: &'static str, + description: &'static str, +} + +#[rustfmt::skip] +const DEFAULT_LINT_COMPLETIONS: &[LintCompletion] = &[ + LintCompletion { label: "absolute_paths_not_starting_with_crate", description: r#"fully qualified paths that start with a module name instead of `crate`, `self`, or an extern crate name"# }, + LintCompletion { label: "anonymous_parameters", description: r#"detects anonymous parameters"# }, + LintCompletion { label: "box_pointers", description: r#"use of owned (Box type) heap memory"# }, + LintCompletion { label: "deprecated_in_future", description: r#"detects use of items that will be deprecated in a future version"# }, + LintCompletion { label: "elided_lifetimes_in_paths", description: r#"hidden lifetime parameters in types are deprecated"# }, + LintCompletion { label: "explicit_outlives_requirements", description: r#"outlives requirements can be inferred"# }, + LintCompletion { label: "indirect_structural_match", description: r#"pattern with const indirectly referencing non-structural-match type"# }, + LintCompletion { label: "keyword_idents", description: r#"detects edition keywords being used as an identifier"# }, + LintCompletion { label: "macro_use_extern_crate", description: r#"the `#[macro_use]` attribute is now deprecated in favor of using macros via the module system"# }, + LintCompletion { label: "meta_variable_misuse", description: r#"possible meta-variable misuse at macro definition"# }, + LintCompletion { label: "missing_copy_implementations", description: r#"detects potentially-forgotten implementations of `Copy`"# }, + LintCompletion { label: "missing_crate_level_docs", description: r#"detects crates with no crate-level documentation"# }, + LintCompletion { label: "missing_debug_implementations", description: r#"detects missing implementations of Debug"# }, + LintCompletion { label: "missing_docs", description: r#"detects missing documentation for public members"# }, + LintCompletion { label: "missing_doc_code_examples", description: r#"detects publicly-exported items without code samples in their documentation"# }, + LintCompletion { label: "non_ascii_idents", description: r#"detects non-ASCII identifiers"# }, + LintCompletion { label: "private_doc_tests", description: r#"detects code samples in docs of private items not documented by rustdoc"# }, + LintCompletion { label: "single_use_lifetimes", description: r#"detects lifetime parameters that are only used once"# }, + LintCompletion { label: "trivial_casts", description: r#"detects trivial casts which could be removed"# }, + LintCompletion { label: "trivial_numeric_casts", description: r#"detects trivial casts of numeric types which could be removed"# }, + LintCompletion { label: "unaligned_references", description: r#"detects unaligned references to fields of packed structs"# }, + LintCompletion { label: "unreachable_pub", description: r#"`pub` items not reachable from crate root"# }, + LintCompletion { label: "unsafe_code", description: r#"usage of `unsafe` code"# }, + LintCompletion { label: "unsafe_op_in_unsafe_fn", description: r#"unsafe operations in unsafe functions without an explicit unsafe block are deprecated"# }, + LintCompletion { label: "unstable_features", description: r#"enabling unstable features (deprecated. do not use)"# }, + LintCompletion { label: "unused_crate_dependencies", description: r#"crate dependencies that are never used"# }, + LintCompletion { label: "unused_extern_crates", description: r#"extern crates that are never used"# }, + LintCompletion { label: "unused_import_braces", description: r#"unnecessary braces around an imported item"# }, + LintCompletion { label: "unused_lifetimes", description: r#"detects lifetime parameters that are never used"# }, + LintCompletion { label: "unused_qualifications", description: r#"detects unnecessarily qualified names"# }, + LintCompletion { label: "unused_results", description: r#"unused result of an expression in a statement"# }, + LintCompletion { label: "variant_size_differences", description: r#"detects enums with widely varying variant sizes"# }, + LintCompletion { label: "array_into_iter", description: r#"detects calling `into_iter` on arrays"# }, + LintCompletion { label: "asm_sub_register", description: r#"using only a subset of a register for inline asm inputs"# }, + LintCompletion { label: "bare_trait_objects", description: r#"suggest using `dyn Trait` for trait objects"# }, + LintCompletion { label: "bindings_with_variant_name", description: r#"detects pattern bindings with the same name as one of the matched variants"# }, + LintCompletion { label: "cenum_impl_drop_cast", description: r#"a C-like enum implementing Drop is cast"# }, + LintCompletion { label: "clashing_extern_declarations", description: r#"detects when an extern fn has been declared with the same name but different types"# }, + LintCompletion { label: "coherence_leak_check", description: r#"distinct impls distinguished only by the leak-check code"# }, + LintCompletion { label: "confusable_idents", description: r#"detects visually confusable pairs between identifiers"# }, + LintCompletion { label: "dead_code", description: r#"detect unused, unexported items"# }, + LintCompletion { label: "deprecated", description: r#"detects use of deprecated items"# }, + LintCompletion { label: "ellipsis_inclusive_range_patterns", description: r#"`...` range patterns are deprecated"# }, + LintCompletion { label: "exported_private_dependencies", description: r#"public interface leaks type from a private dependency"# }, + LintCompletion { label: "illegal_floating_point_literal_pattern", description: r#"floating-point literals cannot be used in patterns"# }, + LintCompletion { label: "improper_ctypes", description: r#"proper use of libc types in foreign modules"# }, + LintCompletion { label: "improper_ctypes_definitions", description: r#"proper use of libc types in foreign item definitions"# }, + LintCompletion { label: "incomplete_features", description: r#"incomplete features that may function improperly in some or all cases"# }, + LintCompletion { label: "inline_no_sanitize", description: r#"detects incompatible use of `#[inline(always)]` and `#[no_sanitize(...)]`"# }, + LintCompletion { label: "intra_doc_link_resolution_failure", description: r#"failures in resolving intra-doc link targets"# }, + LintCompletion { label: "invalid_codeblock_attributes", description: r#"codeblock attribute looks a lot like a known one"# }, + LintCompletion { label: "invalid_value", description: r#"an invalid value is being created (such as a NULL reference)"# }, + LintCompletion { label: "irrefutable_let_patterns", description: r#"detects irrefutable patterns in if-let and while-let statements"# }, + LintCompletion { label: "late_bound_lifetime_arguments", description: r#"detects generic lifetime arguments in path segments with late bound lifetime parameters"# }, + LintCompletion { label: "mixed_script_confusables", description: r#"detects Unicode scripts whose mixed script confusables codepoints are solely used"# }, + LintCompletion { label: "mutable_borrow_reservation_conflict", description: r#"reservation of a two-phased borrow conflicts with other shared borrows"# }, + LintCompletion { label: "non_camel_case_types", description: r#"types, variants, traits and type parameters should have camel case names"# }, + LintCompletion { label: "non_shorthand_field_patterns", description: r#"using `Struct { x: x }` instead of `Struct { x }` in a pattern"# }, + LintCompletion { label: "non_snake_case", description: r#"variables, methods, functions, lifetime parameters and modules should have snake case names"# }, + LintCompletion { label: "non_upper_case_globals", description: r#"static constants should have uppercase identifiers"# }, + LintCompletion { label: "no_mangle_generic_items", description: r#"generic items must be mangled"# }, + LintCompletion { label: "overlapping_patterns", description: r#"detects overlapping patterns"# }, + LintCompletion { label: "path_statements", description: r#"path statements with no effect"# }, + LintCompletion { label: "private_in_public", description: r#"detect private items in public interfaces not caught by the old implementation"# }, + LintCompletion { label: "proc_macro_derive_resolution_fallback", description: r#"detects proc macro derives using inaccessible names from parent modules"# }, + LintCompletion { label: "redundant_semicolons", description: r#"detects unnecessary trailing semicolons"# }, + LintCompletion { label: "renamed_and_removed_lints", description: r#"lints that have been renamed or removed"# }, + LintCompletion { label: "safe_packed_borrows", description: r#"safe borrows of fields of packed structs were erroneously allowed"# }, + LintCompletion { label: "stable_features", description: r#"stable features found in `#[feature]` directive"# }, + LintCompletion { label: "trivial_bounds", description: r#"these bounds don't depend on an type parameters"# }, + LintCompletion { label: "type_alias_bounds", description: r#"bounds in type aliases are not enforced"# }, + LintCompletion { label: "tyvar_behind_raw_pointer", description: r#"raw pointer to an inference variable"# }, + LintCompletion { label: "uncommon_codepoints", description: r#"detects uncommon Unicode codepoints in identifiers"# }, + LintCompletion { label: "unconditional_recursion", description: r#"functions that cannot return without calling themselves"# }, + LintCompletion { label: "unknown_lints", description: r#"unrecognized lint attribute"# }, + LintCompletion { label: "unnameable_test_items", description: r#"detects an item that cannot be named being marked as `#[test_case]`"# }, + LintCompletion { label: "unreachable_code", description: r#"detects unreachable code paths"# }, + LintCompletion { label: "unreachable_patterns", description: r#"detects unreachable patterns"# }, + LintCompletion { label: "unstable_name_collisions", description: r#"detects name collision with an existing but unstable method"# }, + LintCompletion { label: "unused_allocation", description: r#"detects unnecessary allocations that can be eliminated"# }, + LintCompletion { label: "unused_assignments", description: r#"detect assignments that will never be read"# }, + LintCompletion { label: "unused_attributes", description: r#"detects attributes that were not used by the compiler"# }, + LintCompletion { label: "unused_braces", description: r#"unnecessary braces around an expression"# }, + LintCompletion { label: "unused_comparisons", description: r#"comparisons made useless by limits of the types involved"# }, + LintCompletion { label: "unused_doc_comments", description: r#"detects doc comments that aren't used by rustdoc"# }, + LintCompletion { label: "unused_features", description: r#"unused features found in crate-level `#[feature]` directives"# }, + LintCompletion { label: "unused_imports", description: r#"imports that are never used"# }, + LintCompletion { label: "unused_labels", description: r#"detects labels that are never used"# }, + LintCompletion { label: "unused_macros", description: r#"detects macros that were not used"# }, + LintCompletion { label: "unused_must_use", description: r#"unused result of a type flagged as `#[must_use]`"# }, + LintCompletion { label: "unused_mut", description: r#"detect mut variables which don't need to be mutable"# }, + LintCompletion { label: "unused_parens", description: r#"`if`, `match`, `while` and `return` do not need parentheses"# }, + LintCompletion { label: "unused_unsafe", description: r#"unnecessary use of an `unsafe` block"# }, + LintCompletion { label: "unused_variables", description: r#"detect variables which are not used in any way"# }, + LintCompletion { label: "warnings", description: r#"mass-change the level for lints which produce warnings"# }, + LintCompletion { label: "where_clauses_object_safety", description: r#"checks the object safety of where clauses"# }, + LintCompletion { label: "while_true", description: r#"suggest using `loop { }` instead of `while true { }`"# }, + LintCompletion { label: "ambiguous_associated_items", description: r#"ambiguous associated items"# }, + LintCompletion { label: "arithmetic_overflow", description: r#"arithmetic operation overflows"# }, + LintCompletion { label: "conflicting_repr_hints", description: r#"conflicts between `#[repr(..)]` hints that were previously accepted and used in practice"# }, + LintCompletion { label: "const_err", description: r#"constant evaluation detected erroneous expression"# }, + LintCompletion { label: "ill_formed_attribute_input", description: r#"ill-formed attribute inputs that were previously accepted and used in practice"# }, + LintCompletion { label: "incomplete_include", description: r#"trailing content in included file"# }, + LintCompletion { label: "invalid_type_param_default", description: r#"type parameter default erroneously allowed in invalid location"# }, + LintCompletion { label: "macro_expanded_macro_exports_accessed_by_absolute_paths", description: r#"macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths"# }, + LintCompletion { label: "missing_fragment_specifier", description: r#"detects missing fragment specifiers in unused `macro_rules!` patterns"# }, + LintCompletion { label: "mutable_transmutes", description: r#"mutating transmuted &mut T from &T may cause undefined behavior"# }, + LintCompletion { label: "no_mangle_const_items", description: r#"const items will not have their symbols exported"# }, + LintCompletion { label: "order_dependent_trait_objects", description: r#"trait-object types were treated as different depending on marker-trait order"# }, + LintCompletion { label: "overflowing_literals", description: r#"literal out of range for its type"# }, + LintCompletion { label: "patterns_in_fns_without_body", description: r#"patterns in functions without body were erroneously allowed"# }, + LintCompletion { label: "pub_use_of_private_extern_crate", description: r#"detect public re-exports of private extern crates"# }, + LintCompletion { label: "soft_unstable", description: r#"a feature gate that doesn't break dependent crates"# }, + LintCompletion { label: "unconditional_panic", description: r#"operation will cause a panic at runtime"# }, + LintCompletion { label: "unknown_crate_types", description: r#"unknown crate type found in `#[crate_type]` directive"# }, +]; + +#[cfg(test)] +mod tests { + use expect::{expect, Expect}; + + use crate::completion::{test_utils::completion_list, CompletionKind}; + + fn check(ra_fixture: &str, expect: Expect) { + let actual = completion_list(ra_fixture, CompletionKind::Attribute); + expect.assert_eq(&actual); + } + + #[test] + fn empty_derive_completion() { + check( + r#" +#[derive(<|>)] +struct Test {} + "#, + expect![[r#" + at Clone + at Copy, Clone + at Debug + at Default + at Eq, PartialEq + at Hash + at Ord, PartialOrd, Eq, PartialEq + at PartialEq + at PartialOrd, PartialEq + "#]], + ); + } + + #[test] + fn empty_lint_completion() { + check( + r#"#[allow(<|>)]"#, + expect![[r#" + at absolute_paths_not_starting_with_crate fully qualified paths that start with a module name instead of `crate`, `self`, or an extern crate name + at ambiguous_associated_items ambiguous associated items + at anonymous_parameters detects anonymous parameters + at arithmetic_overflow arithmetic operation overflows + at array_into_iter detects calling `into_iter` on arrays + at asm_sub_register using only a subset of a register for inline asm inputs + at bare_trait_objects suggest using `dyn Trait` for trait objects + at bindings_with_variant_name detects pattern bindings with the same name as one of the matched variants + at box_pointers use of owned (Box type) heap memory + at cenum_impl_drop_cast a C-like enum implementing Drop is cast + at clashing_extern_declarations detects when an extern fn has been declared with the same name but different types + at coherence_leak_check distinct impls distinguished only by the leak-check code + at conflicting_repr_hints conflicts between `#[repr(..)]` hints that were previously accepted and used in practice + at confusable_idents detects visually confusable pairs between identifiers + at const_err constant evaluation detected erroneous expression + at dead_code detect unused, unexported items + at deprecated detects use of deprecated items + at deprecated_in_future detects use of items that will be deprecated in a future version + at elided_lifetimes_in_paths hidden lifetime parameters in types are deprecated + at ellipsis_inclusive_range_patterns `...` range patterns are deprecated + at explicit_outlives_requirements outlives requirements can be inferred + at exported_private_dependencies public interface leaks type from a private dependency + at ill_formed_attribute_input ill-formed attribute inputs that were previously accepted and used in practice + at illegal_floating_point_literal_pattern floating-point literals cannot be used in patterns + at improper_ctypes proper use of libc types in foreign modules + at improper_ctypes_definitions proper use of libc types in foreign item definitions + at incomplete_features incomplete features that may function improperly in some or all cases + at incomplete_include trailing content in included file + at indirect_structural_match pattern with const indirectly referencing non-structural-match type + at inline_no_sanitize detects incompatible use of `#[inline(always)]` and `#[no_sanitize(...)]` + at intra_doc_link_resolution_failure failures in resolving intra-doc link targets + at invalid_codeblock_attributes codeblock attribute looks a lot like a known one + at invalid_type_param_default type parameter default erroneously allowed in invalid location + at invalid_value an invalid value is being created (such as a NULL reference) + at irrefutable_let_patterns detects irrefutable patterns in if-let and while-let statements + at keyword_idents detects edition keywords being used as an identifier + at late_bound_lifetime_arguments detects generic lifetime arguments in path segments with late bound lifetime parameters + at macro_expanded_macro_exports_accessed_by_absolute_paths macro-expanded `macro_export` macros from the current crate cannot be referred to by absolute paths + at macro_use_extern_crate the `#[macro_use]` attribute is now deprecated in favor of using macros via the module system + at meta_variable_misuse possible meta-variable misuse at macro definition + at missing_copy_implementations detects potentially-forgotten implementations of `Copy` + at missing_crate_level_docs detects crates with no crate-level documentation + at missing_debug_implementations detects missing implementations of Debug + at missing_doc_code_examples detects publicly-exported items without code samples in their documentation + at missing_docs detects missing documentation for public members + at missing_fragment_specifier detects missing fragment specifiers in unused `macro_rules!` patterns + at mixed_script_confusables detects Unicode scripts whose mixed script confusables codepoints are solely used + at mutable_borrow_reservation_conflict reservation of a two-phased borrow conflicts with other shared borrows + at mutable_transmutes mutating transmuted &mut T from &T may cause undefined behavior + at no_mangle_const_items const items will not have their symbols exported + at no_mangle_generic_items generic items must be mangled + at non_ascii_idents detects non-ASCII identifiers + at non_camel_case_types types, variants, traits and type parameters should have camel case names + at non_shorthand_field_patterns using `Struct { x: x }` instead of `Struct { x }` in a pattern + at non_snake_case variables, methods, functions, lifetime parameters and modules should have snake case names + at non_upper_case_globals static constants should have uppercase identifiers + at order_dependent_trait_objects trait-object types were treated as different depending on marker-trait order + at overflowing_literals literal out of range for its type + at overlapping_patterns detects overlapping patterns + at path_statements path statements with no effect + at patterns_in_fns_without_body patterns in functions without body were erroneously allowed + at private_doc_tests detects code samples in docs of private items not documented by rustdoc + at private_in_public detect private items in public interfaces not caught by the old implementation + at proc_macro_derive_resolution_fallback detects proc macro derives using inaccessible names from parent modules + at pub_use_of_private_extern_crate detect public re-exports of private extern crates + at redundant_semicolons detects unnecessary trailing semicolons + at renamed_and_removed_lints lints that have been renamed or removed + at safe_packed_borrows safe borrows of fields of packed structs were erroneously allowed + at single_use_lifetimes detects lifetime parameters that are only used once + at soft_unstable a feature gate that doesn't break dependent crates + at stable_features stable features found in `#[feature]` directive + at trivial_bounds these bounds don't depend on an type parameters + at trivial_casts detects trivial casts which could be removed + at trivial_numeric_casts detects trivial casts of numeric types which could be removed + at type_alias_bounds bounds in type aliases are not enforced + at tyvar_behind_raw_pointer raw pointer to an inference variable + at unaligned_references detects unaligned references to fields of packed structs + at uncommon_codepoints detects uncommon Unicode codepoints in identifiers + at unconditional_panic operation will cause a panic at runtime + at unconditional_recursion functions that cannot return without calling themselves + at unknown_crate_types unknown crate type found in `#[crate_type]` directive + at unknown_lints unrecognized lint attribute + at unnameable_test_items detects an item that cannot be named being marked as `#[test_case]` + at unreachable_code detects unreachable code paths + at unreachable_patterns detects unreachable patterns + at unreachable_pub `pub` items not reachable from crate root + at unsafe_code usage of `unsafe` code + at unsafe_op_in_unsafe_fn unsafe operations in unsafe functions without an explicit unsafe block are deprecated + at unstable_features enabling unstable features (deprecated. do not use) + at unstable_name_collisions detects name collision with an existing but unstable method + at unused_allocation detects unnecessary allocations that can be eliminated + at unused_assignments detect assignments that will never be read + at unused_attributes detects attributes that were not used by the compiler + at unused_braces unnecessary braces around an expression + at unused_comparisons comparisons made useless by limits of the types involved + at unused_crate_dependencies crate dependencies that are never used + at unused_doc_comments detects doc comments that aren't used by rustdoc + at unused_extern_crates extern crates that are never used + at unused_features unused features found in crate-level `#[feature]` directives + at unused_import_braces unnecessary braces around an imported item + at unused_imports imports that are never used + at unused_labels detects labels that are never used + at unused_lifetimes detects lifetime parameters that are never used + at unused_macros detects macros that were not used + at unused_must_use unused result of a type flagged as `#[must_use]` + at unused_mut detect mut variables which don't need to be mutable + at unused_parens `if`, `match`, `while` and `return` do not need parentheses + at unused_qualifications detects unnecessarily qualified names + at unused_results unused result of an expression in a statement + at unused_unsafe unnecessary use of an `unsafe` block + at unused_variables detect variables which are not used in any way + at variant_size_differences detects enums with widely varying variant sizes + at warnings mass-change the level for lints which produce warnings + at where_clauses_object_safety checks the object safety of where clauses + at while_true suggest using `loop { }` instead of `while true { }` + "#]], + ) + } + + #[test] + fn no_completion_for_incorrect_derive() { + check( + r#" +#[derive{<|>)] +struct Test {} +"#, + expect![[r#""#]], + ) + } + + #[test] + fn derive_with_input_completion() { + check( + r#" +#[derive(serde::Serialize, PartialEq, <|>)] +struct Test {} +"#, + expect![[r#" + at Clone + at Copy, Clone + at Debug + at Default + at Eq + at Hash + at Ord, PartialOrd, Eq + at PartialOrd + "#]], + ) + } + + #[test] + fn test_attribute_completion() { + check( + r#"#[<|>]"#, + expect![[r#" + at allow(…) + at cfg(…) + at cfg_attr(…) + at deny(…) + at deprecated = "…" + at derive(…) + at doc = "…" + at forbid(…) + at ignore = "…" + at inline(…) + at link + at link_name = "…" + at macro_export + at macro_use + at must_use = "…" + at no_mangle + at non_exhaustive + at path = "…" + at proc_macro + at proc_macro_attribute + at proc_macro_derive(…) + at repr(…) + at should_panic(…) + at target_feature = "…" + at test + at used + at warn(…) + "#]], + ) + } + + #[test] + fn test_attribute_completion_inside_nested_attr() { + check(r#"#[cfg(<|>)]"#, expect![[]]) + } + + #[test] + fn test_inner_attribute_completion() { + check( + r"#![<|>]", + expect![[r#" + at allow(…) + at cfg(…) + at cfg_attr(…) + at deny(…) + at deprecated = "…" + at derive(…) + at doc = "…" + at feature(…) + at forbid(…) + at global_allocator + at ignore = "…" + at inline(…) + at link + at link_name = "…" + at macro_export + at macro_use + at must_use = "…" + at no_mangle + at no_std + at non_exhaustive + at panic_handler + at path = "…" + at proc_macro + at proc_macro_attribute + at proc_macro_derive(…) + at recursion_limit = … + at repr(…) + at should_panic(…) + at target_feature = "…" + at test + at used + at warn(…) + at windows_subsystem = "…" + "#]], + ); + } +} -- cgit v1.2.3