From 2b8dcc15ac25ec559258b46b9080b7d4c17178a4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Emil=20Gardstr=C3=B6m?= Date: Mon, 27 Jul 2020 01:49:17 +0200 Subject: add completion for rustc lints --- crates/ra_ide/src/completion/complete_attribute.rs | 282 ++++++++++++++++++++- 1 file changed, 278 insertions(+), 4 deletions(-) (limited to 'crates/ra_ide/src/completion/complete_attribute.rs') diff --git a/crates/ra_ide/src/completion/complete_attribute.rs b/crates/ra_ide/src/completion/complete_attribute.rs index d268c92be..109c5e9a8 100644 --- a/crates/ra_ide/src/completion/complete_attribute.rs +++ b/crates/ra_ide/src/completion/complete_attribute.rs @@ -13,13 +13,19 @@ use crate::completion::{ pub(super) fn complete_attribute(acc: &mut Completions, ctx: &CompletionContext) -> Option<()> { let attribute = ctx.attribute_under_caret.as_ref()?; - match (attribute.path(), attribute.input()) { (Some(path), Some(ast::AttrInput::TokenTree(token_tree))) if path.to_string() == "derive" => { complete_derive(acc, ctx, token_tree) } + (Some(path), Some(ast::AttrInput::TokenTree(token_tree))) + if ["allow", "warn", "deny", "forbid"] + .iter() + .any(|lint_level| lint_level == &path.to_string()) => + { + complete_lint(acc, ctx, token_tree) + } (_, Some(ast::AttrInput::TokenTree(_token_tree))) => {} _ => complete_attribute_start(acc, ctx, attribute), } @@ -125,7 +131,7 @@ const ATTRIBUTES: &[AttrCompletion] = &[ ]; fn complete_derive(acc: &mut Completions, ctx: &CompletionContext, derive_input: ast::TokenTree) { - if let Ok(existing_derives) = parse_derive_input(derive_input) { + 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)) @@ -158,7 +164,26 @@ fn complete_derive(acc: &mut Completions, ctx: &CompletionContext, derive_input: } } -fn parse_derive_input(derive_input: ast::TokenTree) -> Result, ()> { +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 @@ -212,6 +237,7 @@ struct DeriveCompletion { /// 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"] }, @@ -224,6 +250,130 @@ const DEFAULT_DERIVE_COMPLETIONS: &[DeriveCompletion] = &[ 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}; @@ -256,6 +406,130 @@ struct Test {} ); } + #[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( @@ -325,7 +599,7 @@ struct Test {} #[test] fn test_attribute_completion_inside_nested_attr() { - check(r#"#[allow(<|>)]"#, expect![[]]) + check(r#"#[cfg(<|>)]"#, expect![[]]) } #[test] -- cgit v1.2.3