From 1e88f5ec8e0ca6692d705b2100299822abfc4220 Mon Sep 17 00:00:00 2001 From: Lukas Wirth Date: Fri, 23 Apr 2021 17:19:46 +0200 Subject: Simplify highlight token match guards --- crates/ide/src/syntax_highlighting/highlight.rs | 176 ++++++++++-------------- crates/ide/src/syntax_highlighting/tags.rs | 18 +++ 2 files changed, 92 insertions(+), 102 deletions(-) (limited to 'crates/ide/src/syntax_highlighting') diff --git a/crates/ide/src/syntax_highlighting/highlight.rs b/crates/ide/src/syntax_highlighting/highlight.rs index 62213dc47..8731699dc 100644 --- a/crates/ide/src/syntax_highlighting/highlight.rs +++ b/crates/ide/src/syntax_highlighting/highlight.rs @@ -1,6 +1,6 @@ //! Computes color for a single element. -use hir::{AsAssocItem, AssocItemContainer, Semantics, VariantDef}; +use hir::{AsAssocItem, Semantics}; use ide_db::{ defs::{Definition, NameClass, NameRefClass}, RootDatabase, SymbolKind, @@ -45,28 +45,26 @@ pub(super) fn element( }; match name_kind { - Some(NameClass::ExternCrate(_)) => HlTag::Symbol(SymbolKind::Module).into(), + Some(NameClass::ExternCrate(_)) => SymbolKind::Module.into(), Some(NameClass::Definition(def)) => highlight_def(db, def) | HlMod::Definition, Some(NameClass::ConstReference(def)) => highlight_def(db, def), Some(NameClass::PatFieldShorthand { field_ref, .. }) => { let mut h = HlTag::Symbol(SymbolKind::Field).into(); if let Definition::Field(field) = field_ref { - if let VariantDef::Union(_) = field.parent_def(db) { + if let hir::VariantDef::Union(_) = field.parent_def(db) { h |= HlMod::Unsafe; } } - h } None => highlight_name_by_syntax(name) | HlMod::Definition, } } - // Highlight references like the definitions they resolve to NAME_REF if element.ancestors().any(|it| it.kind() == ATTR) => { // even though we track whether we are in an attribute or not we still need this special case // as otherwise we would emit unresolved references for name refs inside attributes - Highlight::from(HlTag::Symbol(SymbolKind::Function)) + SymbolKind::Function.into() } NAME_REF => { let name_ref = element.into_node().and_then(ast::NameRef::cast).unwrap(); @@ -74,7 +72,7 @@ pub(super) fn element( let is_self = name_ref.self_token().is_some(); let h = match NameRefClass::classify(sema, &name_ref) { Some(name_kind) => match name_kind { - NameRefClass::ExternCrate(_) => HlTag::Symbol(SymbolKind::Module).into(), + NameRefClass::ExternCrate(_) => SymbolKind::Module.into(), NameRefClass::Definition(def) => { if let Definition::Local(local) = &def { if let Some(name) = local.name(db) { @@ -95,7 +93,7 @@ pub(super) fn element( if let Some(parent) = name_ref.syntax().parent() { if matches!(parent.kind(), FIELD_EXPR | RECORD_PAT_FIELD) { if let Definition::Field(field) = def { - if let VariantDef::Union(_) = field.parent_def(db) { + if let hir::VariantDef::Union(_) = field.parent_def(db) { h |= HlMod::Unsafe; } } @@ -104,9 +102,7 @@ pub(super) fn element( h } - NameRefClass::FieldShorthand { .. } => { - HlTag::Symbol(SymbolKind::Field).into() - } + NameRefClass::FieldShorthand { .. } => SymbolKind::Field.into(), }, None if syntactic_name_ref_highlighting => { highlight_name_ref_by_syntax(name_ref, sema) @@ -114,7 +110,7 @@ pub(super) fn element( None => HlTag::UnresolvedReference.into(), }; if h.tag == HlTag::Symbol(SymbolKind::Module) && is_self { - HlTag::Symbol(SymbolKind::SelfParam).into() + SymbolKind::SelfParam.into() } else { h } @@ -135,7 +131,7 @@ pub(super) fn element( INT_NUMBER | FLOAT_NUMBER => HlTag::NumericLiteral.into(), BYTE => HlTag::ByteLiteral.into(), CHAR => HlTag::CharLiteral.into(), - QUESTION => Highlight::new(HlTag::Operator(HlOperator::Other)) | HlMod::ControlFlow, + QUESTION => HlTag::Operator(HlOperator::Other) | HlMod::ControlFlow, LIFETIME => { let lifetime = element.into_node().and_then(ast::Lifetime::cast).unwrap(); @@ -143,44 +139,31 @@ pub(super) fn element( Some(NameClass::Definition(def)) => highlight_def(db, def) | HlMod::Definition, None => match NameRefClass::classify_lifetime(sema, &lifetime) { Some(NameRefClass::Definition(def)) => highlight_def(db, def), - _ => Highlight::new(HlTag::Symbol(SymbolKind::LifetimeParam)), + _ => SymbolKind::LifetimeParam.into(), }, - _ => Highlight::new(HlTag::Symbol(SymbolKind::LifetimeParam)) | HlMod::Definition, + _ => Highlight::from(SymbolKind::LifetimeParam) | HlMod::Definition, } } p if p.is_punct() => match p { - T![&] if element.parent().and_then(ast::BinExpr::cast).is_some() => { - HlTag::Operator(HlOperator::Bitwise).into() - } + T![&] if parent_matches::(&element) => HlOperator::Bitwise.into(), T![&] => { let h = HlTag::Operator(HlOperator::Other).into(); let is_unsafe = element .parent() .and_then(ast::RefExpr::cast) - .map(|ref_expr| sema.is_unsafe_ref_expr(&ref_expr)) - .unwrap_or(false); + .map_or(false, |ref_expr| sema.is_unsafe_ref_expr(&ref_expr)); if is_unsafe { h | HlMod::Unsafe } else { h } } - T![::] | T![->] | T![=>] | T![..] | T![=] | T![@] | T![.] => { - HlTag::Operator(HlOperator::Other).into() - } - T![!] if element.parent().and_then(ast::MacroCall::cast).is_some() => { - HlTag::Symbol(SymbolKind::Macro).into() - } - T![!] if element.parent().and_then(ast::NeverType::cast).is_some() => { - HlTag::BuiltinType.into() - } - T![!] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => { - HlTag::Operator(HlOperator::Logical).into() - } - T![*] if element.parent().and_then(ast::PtrType::cast).is_some() => { - HlTag::Keyword.into() - } - T![*] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => { + T![::] | T![->] | T![=>] | T![..] | T![=] | T![@] | T![.] => HlOperator::Other.into(), + T![!] if parent_matches::(&element) => SymbolKind::Macro.into(), + T![!] if parent_matches::(&element) => HlTag::BuiltinType.into(), + T![!] if parent_matches::(&element) => HlOperator::Logical.into(), + T![*] if parent_matches::(&element) => HlTag::Keyword.into(), + T![*] if parent_matches::(&element) => { let prefix_expr = element.parent().and_then(ast::PrefixExpr::cast)?; let expr = prefix_expr.expr()?; @@ -188,12 +171,12 @@ pub(super) fn element( if ty.is_raw_ptr() { HlTag::Operator(HlOperator::Other) | HlMod::Unsafe } else if let Some(ast::PrefixOp::Deref) = prefix_expr.op_kind() { - HlTag::Operator(HlOperator::Other).into() + HlOperator::Other.into() } else { - HlTag::Punctuation(HlPunct::Other).into() + HlPunct::Other.into() } } - T![-] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => { + T![-] if parent_matches::(&element) => { let prefix_expr = element.parent().and_then(ast::PrefixExpr::cast)?; let expr = prefix_expr.expr()?; @@ -203,41 +186,31 @@ pub(super) fn element( } .into() } - _ if element.parent().and_then(ast::PrefixExpr::cast).is_some() => { - HlTag::Operator(HlOperator::Other).into() - } + _ if parent_matches::(&element) => HlOperator::Other.into(), T![+] | T![-] | T![*] | T![/] | T![+=] | T![-=] | T![*=] | T![/=] - if element.parent().and_then(ast::BinExpr::cast).is_some() => + if parent_matches::(&element) => { - HlTag::Operator(HlOperator::Arithmetic).into() + HlOperator::Arithmetic.into() } T![|] | T![&] | T![!] | T![^] | T![|=] | T![&=] | T![^=] - if element.parent().and_then(ast::BinExpr::cast).is_some() => + if parent_matches::(&element) => { - HlTag::Operator(HlOperator::Bitwise).into() + HlOperator::Bitwise.into() } - T![&&] | T![||] if element.parent().and_then(ast::BinExpr::cast).is_some() => { - HlTag::Operator(HlOperator::Logical).into() + T![&&] | T![||] if parent_matches::(&element) => { + HlOperator::Logical.into() } T![>] | T![<] | T![==] | T![>=] | T![<=] | T![!=] - if element.parent().and_then(ast::BinExpr::cast).is_some() => + if parent_matches::(&element) => { - HlTag::Operator(HlOperator::Comparison).into() - } - _ if element.parent().and_then(ast::BinExpr::cast).is_some() => { - HlTag::Operator(HlOperator::Other).into() + HlOperator::Comparison.into() } - _ if element.parent().and_then(ast::RangeExpr::cast).is_some() => { - HlTag::Operator(HlOperator::Other).into() - } - _ if element.parent().and_then(ast::RangePat::cast).is_some() => { - HlTag::Operator(HlOperator::Other).into() - } - _ if element.parent().and_then(ast::RestPat::cast).is_some() => { - HlTag::Operator(HlOperator::Other).into() - } - _ if element.parent().and_then(ast::Attr::cast).is_some() => HlTag::Attribute.into(), - kind => HlTag::Punctuation(match kind { + _ if parent_matches::(&element) => HlOperator::Other.into(), + _ if parent_matches::(&element) => HlOperator::Other.into(), + _ if parent_matches::(&element) => HlOperator::Other.into(), + _ if parent_matches::(&element) => HlOperator::Other.into(), + _ if parent_matches::(&element) => HlTag::Attribute.into(), + kind => match kind { T!['['] | T![']'] => HlPunct::Bracket, T!['{'] | T!['}'] => HlPunct::Brace, T!['('] | T![')'] => HlPunct::Parenthesis, @@ -247,7 +220,7 @@ pub(super) fn element( T![;] => HlPunct::Semi, T![.] => HlPunct::Dot, _ => HlPunct::Other, - }) + } .into(), }, @@ -303,7 +276,6 @@ pub(super) fn element( hash((name, shadow_count)) } } - fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight { match def { Definition::Macro(_) => HlTag::Symbol(SymbolKind::Macro), @@ -319,12 +291,12 @@ fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight { } match item.container(db) { - AssocItemContainer::Impl(i) => { + hir::AssocItemContainer::Impl(i) => { if i.trait_(db).is_some() { h |= HlMod::Trait; } } - AssocItemContainer::Trait(_t) => { + hir::AssocItemContainer::Trait(_t) => { h |= HlMod::Trait; } } @@ -344,12 +316,12 @@ fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight { if let Some(item) = konst.as_assoc_item(db) { h |= HlMod::Associated; match item.container(db) { - AssocItemContainer::Impl(i) => { + hir::AssocItemContainer::Impl(i) => { if i.trait_(db).is_some() { h |= HlMod::Trait; } } - AssocItemContainer::Trait(_t) => { + hir::AssocItemContainer::Trait(_t) => { h |= HlMod::Trait; } } @@ -363,12 +335,12 @@ fn highlight_def(db: &RootDatabase, def: Definition) -> Highlight { if let Some(item) = type_.as_assoc_item(db) { h |= HlMod::Associated; match item.container(db) { - AssocItemContainer::Impl(i) => { + hir::AssocItemContainer::Impl(i) => { if i.trait_(db).is_some() { h |= HlMod::Trait; } } - AssocItemContainer::Trait(_t) => { + hir::AssocItemContainer::Trait(_t) => { h |= HlMod::Trait; } } @@ -427,7 +399,7 @@ fn highlight_method_call( method_call: &ast::MethodCallExpr, ) -> Option { let func = sema.resolve_method_call(&method_call)?; - let mut h = HlTag::Symbol(SymbolKind::Function).into(); + let mut h = SymbolKind::Function.into(); h |= HlMod::Associated; if func.is_unsafe(sema.db) || sema.is_unsafe_method_call(&method_call) { h |= HlMod::Unsafe; @@ -463,20 +435,20 @@ fn highlight_name_by_syntax(name: ast::Name) -> Highlight { }; let tag = match parent.kind() { - STRUCT => HlTag::Symbol(SymbolKind::Struct), - ENUM => HlTag::Symbol(SymbolKind::Enum), - VARIANT => HlTag::Symbol(SymbolKind::Variant), - UNION => HlTag::Symbol(SymbolKind::Union), - TRAIT => HlTag::Symbol(SymbolKind::Trait), - TYPE_ALIAS => HlTag::Symbol(SymbolKind::TypeAlias), - TYPE_PARAM => HlTag::Symbol(SymbolKind::TypeParam), - RECORD_FIELD => HlTag::Symbol(SymbolKind::Field), - MODULE => HlTag::Symbol(SymbolKind::Module), - FN => HlTag::Symbol(SymbolKind::Function), - CONST => HlTag::Symbol(SymbolKind::Const), - STATIC => HlTag::Symbol(SymbolKind::Static), - IDENT_PAT => HlTag::Symbol(SymbolKind::Local), - _ => default, + STRUCT => SymbolKind::Struct, + ENUM => SymbolKind::Enum, + VARIANT => SymbolKind::Variant, + UNION => SymbolKind::Union, + TRAIT => SymbolKind::Trait, + TYPE_ALIAS => SymbolKind::TypeAlias, + TYPE_PARAM => SymbolKind::TypeParam, + RECORD_FIELD => SymbolKind::Field, + MODULE => SymbolKind::Module, + FN => SymbolKind::Function, + CONST => SymbolKind::Const, + STATIC => SymbolKind::Static, + IDENT_PAT => SymbolKind::Local, + _ => return default.into(), }; tag.into() @@ -494,20 +466,15 @@ fn highlight_name_ref_by_syntax(name: ast::NameRef, sema: &Semantics { return ast::MethodCallExpr::cast(parent) .and_then(|it| highlight_method_call(sema, &it)) - .unwrap_or_else(|| HlTag::Symbol(SymbolKind::Function).into()); + .unwrap_or_else(|| SymbolKind::Function.into()); } FIELD_EXPR => { let h = HlTag::Symbol(SymbolKind::Field); let is_union = ast::FieldExpr::cast(parent) - .and_then(|field_expr| { - let field = sema.resolve_field(&field_expr)?; - Some(if let VariantDef::Union(_) = field.parent_def(sema.db) { - true - } else { - false - }) - }) - .unwrap_or(false); + .and_then(|field_expr| sema.resolve_field(&field_expr)) + .map_or(false, |field| { + matches!(field.parent_def(sema.db), hir::VariantDef::Union(_)) + }); if is_union { h | HlMod::Unsafe } else { @@ -524,9 +491,9 @@ fn highlight_name_ref_by_syntax(name: ast::NameRef, sema: &Semantics { // within path, decide whether it is module or adt by checking for uppercase name return if name.text().chars().next().unwrap_or_default().is_uppercase() { - HlTag::Symbol(SymbolKind::Struct) + SymbolKind::Struct } else { - HlTag::Symbol(SymbolKind::Module) + SymbolKind::Module } .into(); } @@ -537,11 +504,11 @@ fn highlight_name_ref_by_syntax(name: ast::NameRef, sema: &Semantics HlTag::Symbol(SymbolKind::Function).into(), + CALL_EXPR => SymbolKind::Function.into(), _ => if name.text().chars().next().unwrap_or_default().is_uppercase() { - HlTag::Symbol(SymbolKind::Struct) + SymbolKind::Struct } else { - HlTag::Symbol(SymbolKind::Const) + SymbolKind::Const } .into(), } @@ -576,6 +543,11 @@ fn parents_match(mut node: NodeOrToken, mut kinds: &[Sy kinds.len() == 0 } +#[inline] +fn parent_matches(element: &SyntaxElement) -> bool { + element.parent().map_or(false, |it| N::can_cast(it.kind())) +} + fn is_child_of_impl(element: &SyntaxElement) -> bool { match element.parent() { Some(e) => e.kind() == IMPL, diff --git a/crates/ide/src/syntax_highlighting/tags.rs b/crates/ide/src/syntax_highlighting/tags.rs index 3bee0ae46..a304b3250 100644 --- a/crates/ide/src/syntax_highlighting/tags.rs +++ b/crates/ide/src/syntax_highlighting/tags.rs @@ -234,6 +234,24 @@ impl From for Highlight { } } +impl From for Highlight { + fn from(op: HlOperator) -> Highlight { + Highlight::new(HlTag::Operator(op)) + } +} + +impl From for Highlight { + fn from(punct: HlPunct) -> Highlight { + Highlight::new(HlTag::Punctuation(punct)) + } +} + +impl From for Highlight { + fn from(sym: SymbolKind) -> Highlight { + Highlight::new(HlTag::Symbol(sym)) + } +} + impl Highlight { pub(crate) fn new(tag: HlTag) -> Highlight { Highlight { tag, mods: HlMods::default() } -- cgit v1.2.3