694 lines
25 KiB
Rust
694 lines
25 KiB
Rust
//! Computes color for a single element.
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use hir::{AsAssocItem, HasVisibility, Semantics};
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use ide_db::{
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defs::{Definition, IdentClass, NameClass, NameRefClass},
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FxHashMap, RootDatabase, SymbolKind,
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};
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use syntax::{
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ast, match_ast, AstNode, AstToken, NodeOrToken,
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SyntaxKind::{self, *},
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SyntaxNode, SyntaxToken, T,
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};
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use crate::{
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syntax_highlighting::tags::{HlOperator, HlPunct},
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Highlight, HlMod, HlTag,
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};
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pub(super) fn token(sema: &Semantics<'_, RootDatabase>, token: SyntaxToken) -> Option<Highlight> {
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if let Some(comment) = ast::Comment::cast(token.clone()) {
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let h = HlTag::Comment;
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return Some(match comment.kind().doc {
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Some(_) => h | HlMod::Documentation,
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None => h.into(),
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});
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}
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let highlight: Highlight = match token.kind() {
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STRING | BYTE_STRING => HlTag::StringLiteral.into(),
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INT_NUMBER if token.parent_ancestors().nth(1).map(|it| it.kind()) == Some(FIELD_EXPR) => {
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SymbolKind::Field.into()
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}
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INT_NUMBER | FLOAT_NUMBER => HlTag::NumericLiteral.into(),
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BYTE => HlTag::ByteLiteral.into(),
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CHAR => HlTag::CharLiteral.into(),
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IDENT if token.parent().and_then(ast::TokenTree::cast).is_some() => {
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// from this point on we are inside a token tree, this only happens for identifiers
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// that were not mapped down into macro invocations
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HlTag::None.into()
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}
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p if p.is_punct() => punctuation(sema, token, p),
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k if k.is_keyword() => keyword(sema, token, k)?,
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_ => return None,
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};
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Some(highlight)
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}
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pub(super) fn name_like(
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sema: &Semantics<'_, RootDatabase>,
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krate: hir::Crate,
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bindings_shadow_count: &mut FxHashMap<hir::Name, u32>,
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syntactic_name_ref_highlighting: bool,
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name_like: ast::NameLike,
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) -> Option<(Highlight, Option<u64>)> {
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let mut binding_hash = None;
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let highlight = match name_like {
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ast::NameLike::NameRef(name_ref) => highlight_name_ref(
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sema,
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krate,
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bindings_shadow_count,
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&mut binding_hash,
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syntactic_name_ref_highlighting,
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name_ref,
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),
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ast::NameLike::Name(name) => {
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highlight_name(sema, bindings_shadow_count, &mut binding_hash, krate, name)
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}
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ast::NameLike::Lifetime(lifetime) => match IdentClass::classify_lifetime(sema, &lifetime) {
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Some(IdentClass::NameClass(NameClass::Definition(def))) => {
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highlight_def(sema, krate, def) | HlMod::Definition
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}
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Some(IdentClass::NameRefClass(NameRefClass::Definition(def))) => {
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highlight_def(sema, krate, def)
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}
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// FIXME: Fallback for 'static and '_, as we do not resolve these yet
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_ => SymbolKind::LifetimeParam.into(),
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},
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};
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Some((highlight, binding_hash))
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}
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fn punctuation(
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sema: &Semantics<'_, RootDatabase>,
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token: SyntaxToken,
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kind: SyntaxKind,
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) -> Highlight {
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let parent = token.parent();
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let parent_kind = parent.as_ref().map_or(EOF, SyntaxNode::kind);
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match (kind, parent_kind) {
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(T![?], TRY_EXPR) => HlTag::Operator(HlOperator::Other) | HlMod::ControlFlow,
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(T![&], BIN_EXPR) => HlOperator::Bitwise.into(),
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(T![&], REF_EXPR) => {
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let h = HlTag::Operator(HlOperator::Other).into();
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let is_unsafe = parent
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.and_then(ast::RefExpr::cast)
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.map(|ref_expr| sema.is_unsafe_ref_expr(&ref_expr));
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if let Some(true) = is_unsafe {
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h | HlMod::Unsafe
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} else {
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h
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}
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}
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(T![::] | T![->] | T![=>] | T![..] | T![..=] | T![=] | T![@] | T![.], _) => {
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HlOperator::Other.into()
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}
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(T![!], MACRO_CALL | MACRO_RULES) => HlPunct::MacroBang.into(),
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(T![!], NEVER_TYPE) => HlTag::BuiltinType.into(),
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(T![!], PREFIX_EXPR) => HlOperator::Logical.into(),
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(T![*], PTR_TYPE) => HlTag::Keyword.into(),
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(T![*], PREFIX_EXPR) => {
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let is_raw_ptr = (|| {
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let prefix_expr = parent.and_then(ast::PrefixExpr::cast)?;
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let expr = prefix_expr.expr()?;
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sema.type_of_expr(&expr)?.original.is_raw_ptr().then_some(())
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})();
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if let Some(()) = is_raw_ptr {
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HlTag::Operator(HlOperator::Other) | HlMod::Unsafe
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} else {
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HlOperator::Other.into()
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}
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}
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(T![-], PREFIX_EXPR) => {
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let prefix_expr = parent.and_then(ast::PrefixExpr::cast).and_then(|e| e.expr());
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match prefix_expr {
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Some(ast::Expr::Literal(_)) => HlTag::NumericLiteral,
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_ => HlTag::Operator(HlOperator::Other),
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}
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.into()
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}
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(T![+] | T![-] | T![*] | T![/] | T![%], BIN_EXPR) => HlOperator::Arithmetic.into(),
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(T![+=] | T![-=] | T![*=] | T![/=] | T![%=], BIN_EXPR) => {
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Highlight::from(HlOperator::Arithmetic) | HlMod::Mutable
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}
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(T![|] | T![&] | T![^] | T![>>] | T![<<], BIN_EXPR) => HlOperator::Bitwise.into(),
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(T![|=] | T![&=] | T![^=] | T![>>=] | T![<<=], BIN_EXPR) => {
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Highlight::from(HlOperator::Bitwise) | HlMod::Mutable
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}
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(T![&&] | T![||], BIN_EXPR) => HlOperator::Logical.into(),
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(T![>] | T![<] | T![==] | T![>=] | T![<=] | T![!=], BIN_EXPR) => {
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HlOperator::Comparison.into()
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}
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(_, ATTR) => HlTag::AttributeBracket.into(),
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(kind, _) => match kind {
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T!['['] | T![']'] => HlPunct::Bracket,
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T!['{'] | T!['}'] => HlPunct::Brace,
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T!['('] | T![')'] => HlPunct::Parenthesis,
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T![<] | T![>] => HlPunct::Angle,
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T![,] => HlPunct::Comma,
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T![:] => HlPunct::Colon,
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T![;] => HlPunct::Semi,
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T![.] => HlPunct::Dot,
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_ => HlPunct::Other,
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}
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.into(),
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}
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}
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fn keyword(
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sema: &Semantics<'_, RootDatabase>,
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token: SyntaxToken,
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kind: SyntaxKind,
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) -> Option<Highlight> {
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let h = Highlight::new(HlTag::Keyword);
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let h = match kind {
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T![await] => h | HlMod::Async | HlMod::ControlFlow,
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T![async] => h | HlMod::Async,
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T![break]
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| T![continue]
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| T![else]
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| T![if]
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| T![in]
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| T![loop]
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| T![match]
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| T![return]
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| T![while]
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| T![yield] => h | HlMod::ControlFlow,
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T![do] | T![yeet] if parent_matches::<ast::YeetExpr>(&token) => h | HlMod::ControlFlow,
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T![for] if parent_matches::<ast::ForExpr>(&token) => h | HlMod::ControlFlow,
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T![unsafe] => h | HlMod::Unsafe,
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T![true] | T![false] => HlTag::BoolLiteral.into(),
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// crate is handled just as a token if it's in an `extern crate`
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T![crate] if parent_matches::<ast::ExternCrate>(&token) => h,
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// self, crate, super and `Self` are handled as either a Name or NameRef already, unless they
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// are inside unmapped token trees
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T![self] | T![crate] | T![super] | T![Self] if parent_matches::<ast::NameRef>(&token) => {
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return None
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}
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T![self] if parent_matches::<ast::Name>(&token) => return None,
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T![ref] => match token.parent().and_then(ast::IdentPat::cast) {
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Some(ident) if sema.is_unsafe_ident_pat(&ident) => h | HlMod::Unsafe,
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_ => h,
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},
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_ => h,
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};
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Some(h)
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}
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fn highlight_name_ref(
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sema: &Semantics<'_, RootDatabase>,
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krate: hir::Crate,
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bindings_shadow_count: &mut FxHashMap<hir::Name, u32>,
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binding_hash: &mut Option<u64>,
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syntactic_name_ref_highlighting: bool,
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name_ref: ast::NameRef,
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) -> Highlight {
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let db = sema.db;
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if let Some(res) = highlight_method_call_by_name_ref(sema, krate, &name_ref) {
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return res;
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}
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let name_class = match NameRefClass::classify(sema, &name_ref) {
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Some(name_kind) => name_kind,
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None if syntactic_name_ref_highlighting => {
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return highlight_name_ref_by_syntax(name_ref, sema, krate)
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}
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// FIXME: This is required for helper attributes used by proc-macros, as those do not map down
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// to anything when used.
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// We can fix this for derive attributes since derive helpers are recorded, but not for
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// general attributes.
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None if name_ref.syntax().ancestors().any(|it| it.kind() == ATTR)
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&& !sema.hir_file_for(name_ref.syntax()).is_derive_attr_pseudo_expansion(sema.db) =>
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{
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return HlTag::Symbol(SymbolKind::Attribute).into();
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}
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None => return HlTag::UnresolvedReference.into(),
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};
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let mut h = match name_class {
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NameRefClass::Definition(def) => {
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if let Definition::Local(local) = &def {
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let name = local.name(db);
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let shadow_count = bindings_shadow_count.entry(name.clone()).or_default();
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*binding_hash = Some(calc_binding_hash(&name, *shadow_count))
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};
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let mut h = highlight_def(sema, krate, def);
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match def {
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Definition::Local(local) if is_consumed_lvalue(name_ref.syntax(), &local, db) => {
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h |= HlMod::Consuming;
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}
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Definition::Trait(trait_) if trait_.is_unsafe(db) => {
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if ast::Impl::for_trait_name_ref(&name_ref)
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.map_or(false, |impl_| impl_.unsafe_token().is_some())
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{
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h |= HlMod::Unsafe;
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}
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}
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Definition::Field(field) => {
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if let Some(parent) = name_ref.syntax().parent() {
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if matches!(parent.kind(), FIELD_EXPR | RECORD_PAT_FIELD) {
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if let hir::VariantDef::Union(_) = field.parent_def(db) {
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h |= HlMod::Unsafe;
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}
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}
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}
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}
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Definition::Macro(_) => {
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if let Some(macro_call) =
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ide_db::syntax_helpers::node_ext::full_path_of_name_ref(&name_ref)
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.and_then(|it| it.syntax().parent().and_then(ast::MacroCall::cast))
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{
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if sema.is_unsafe_macro_call(¯o_call) {
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h |= HlMod::Unsafe;
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}
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}
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}
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_ => (),
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}
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h
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}
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NameRefClass::FieldShorthand { .. } => SymbolKind::Field.into(),
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};
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h.tag = match name_ref.token_kind() {
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T![Self] => HlTag::Symbol(SymbolKind::SelfType),
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T![self] => HlTag::Symbol(SymbolKind::SelfParam),
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T![super] | T![crate] => HlTag::Keyword,
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_ => h.tag,
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};
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h
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}
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fn highlight_name(
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sema: &Semantics<'_, RootDatabase>,
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bindings_shadow_count: &mut FxHashMap<hir::Name, u32>,
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binding_hash: &mut Option<u64>,
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krate: hir::Crate,
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name: ast::Name,
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) -> Highlight {
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let name_kind = NameClass::classify(sema, &name);
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if let Some(NameClass::Definition(Definition::Local(local))) = &name_kind {
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let name = local.name(sema.db);
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let shadow_count = bindings_shadow_count.entry(name.clone()).or_default();
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*shadow_count += 1;
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*binding_hash = Some(calc_binding_hash(&name, *shadow_count))
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};
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match name_kind {
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Some(NameClass::Definition(def)) => {
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let mut h = highlight_def(sema, krate, def) | HlMod::Definition;
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if let Definition::Trait(trait_) = &def {
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if trait_.is_unsafe(sema.db) {
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h |= HlMod::Unsafe;
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}
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}
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h
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}
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Some(NameClass::ConstReference(def)) => highlight_def(sema, krate, def),
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Some(NameClass::PatFieldShorthand { field_ref, .. }) => {
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let mut h = HlTag::Symbol(SymbolKind::Field).into();
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if let hir::VariantDef::Union(_) = field_ref.parent_def(sema.db) {
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h |= HlMod::Unsafe;
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}
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h
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}
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None => highlight_name_by_syntax(name) | HlMod::Definition,
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}
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}
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fn calc_binding_hash(name: &hir::Name, shadow_count: u32) -> u64 {
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fn hash<T: std::hash::Hash + std::fmt::Debug>(x: T) -> u64 {
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use std::{collections::hash_map::DefaultHasher, hash::Hasher};
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let mut hasher = DefaultHasher::new();
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x.hash(&mut hasher);
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hasher.finish()
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}
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hash((name, shadow_count))
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}
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fn highlight_def(
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sema: &Semantics<'_, RootDatabase>,
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krate: hir::Crate,
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def: Definition,
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) -> Highlight {
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let db = sema.db;
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let mut h = match def {
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Definition::Macro(m) => Highlight::new(HlTag::Symbol(m.kind(sema.db).into())),
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Definition::Field(_) => Highlight::new(HlTag::Symbol(SymbolKind::Field)),
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Definition::Module(module) => {
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let mut h = Highlight::new(HlTag::Symbol(SymbolKind::Module));
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if module.is_crate_root(db) {
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h |= HlMod::CrateRoot;
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}
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h
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}
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Definition::Function(func) => {
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let mut h = Highlight::new(HlTag::Symbol(SymbolKind::Function));
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if let Some(item) = func.as_assoc_item(db) {
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h |= HlMod::Associated;
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match func.self_param(db) {
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Some(sp) => match sp.access(db) {
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hir::Access::Exclusive => {
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h |= HlMod::Mutable;
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h |= HlMod::Reference;
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}
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hir::Access::Shared => h |= HlMod::Reference,
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hir::Access::Owned => h |= HlMod::Consuming,
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},
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None => h |= HlMod::Static,
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}
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match item.container(db) {
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hir::AssocItemContainer::Impl(i) => {
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if i.trait_(db).is_some() {
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h |= HlMod::Trait;
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}
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}
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hir::AssocItemContainer::Trait(_t) => {
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h |= HlMod::Trait;
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}
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}
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}
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if func.is_unsafe_to_call(db) {
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h |= HlMod::Unsafe;
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}
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if func.is_async(db) {
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h |= HlMod::Async;
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}
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h
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}
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Definition::Adt(adt) => {
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let h = match adt {
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hir::Adt::Struct(_) => HlTag::Symbol(SymbolKind::Struct),
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hir::Adt::Enum(_) => HlTag::Symbol(SymbolKind::Enum),
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hir::Adt::Union(_) => HlTag::Symbol(SymbolKind::Union),
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};
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Highlight::new(h)
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}
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Definition::Variant(_) => Highlight::new(HlTag::Symbol(SymbolKind::Variant)),
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Definition::Const(konst) => {
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let mut h = Highlight::new(HlTag::Symbol(SymbolKind::Const));
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if let Some(item) = konst.as_assoc_item(db) {
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h |= HlMod::Associated;
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match item.container(db) {
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hir::AssocItemContainer::Impl(i) => {
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if i.trait_(db).is_some() {
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h |= HlMod::Trait;
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}
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}
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hir::AssocItemContainer::Trait(_t) => {
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h |= HlMod::Trait;
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}
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}
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}
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h
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}
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Definition::Trait(_) => Highlight::new(HlTag::Symbol(SymbolKind::Trait)),
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Definition::TraitAlias(_) => Highlight::new(HlTag::Symbol(SymbolKind::TraitAlias)),
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Definition::TypeAlias(type_) => {
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let mut h = Highlight::new(HlTag::Symbol(SymbolKind::TypeAlias));
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if let Some(item) = type_.as_assoc_item(db) {
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h |= HlMod::Associated;
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match item.container(db) {
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hir::AssocItemContainer::Impl(i) => {
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if i.trait_(db).is_some() {
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h |= HlMod::Trait;
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}
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}
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hir::AssocItemContainer::Trait(_t) => {
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h |= HlMod::Trait;
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}
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}
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}
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h
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}
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Definition::BuiltinType(_) => Highlight::new(HlTag::BuiltinType),
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Definition::Static(s) => {
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let mut h = Highlight::new(HlTag::Symbol(SymbolKind::Static));
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if s.is_mut(db) {
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h |= HlMod::Mutable;
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h |= HlMod::Unsafe;
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}
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h
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}
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Definition::SelfType(_) => Highlight::new(HlTag::Symbol(SymbolKind::Impl)),
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Definition::GenericParam(it) => match it {
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hir::GenericParam::TypeParam(_) => Highlight::new(HlTag::Symbol(SymbolKind::TypeParam)),
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hir::GenericParam::ConstParam(_) => {
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Highlight::new(HlTag::Symbol(SymbolKind::ConstParam))
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}
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hir::GenericParam::LifetimeParam(_) => {
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Highlight::new(HlTag::Symbol(SymbolKind::LifetimeParam))
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}
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},
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Definition::Local(local) => {
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let tag = if local.is_self(db) {
|
|
HlTag::Symbol(SymbolKind::SelfParam)
|
|
} else if local.is_param(db) {
|
|
HlTag::Symbol(SymbolKind::ValueParam)
|
|
} else {
|
|
HlTag::Symbol(SymbolKind::Local)
|
|
};
|
|
let mut h = Highlight::new(tag);
|
|
let ty = local.ty(db);
|
|
if local.is_mut(db) || ty.is_mutable_reference() {
|
|
h |= HlMod::Mutable;
|
|
}
|
|
if local.is_ref(db) || ty.is_reference() {
|
|
h |= HlMod::Reference;
|
|
}
|
|
if ty.as_callable(db).is_some() || ty.impls_fnonce(db) {
|
|
h |= HlMod::Callable;
|
|
}
|
|
h
|
|
}
|
|
Definition::Label(_) => Highlight::new(HlTag::Symbol(SymbolKind::Label)),
|
|
Definition::BuiltinAttr(_) => Highlight::new(HlTag::Symbol(SymbolKind::BuiltinAttr)),
|
|
Definition::ToolModule(_) => Highlight::new(HlTag::Symbol(SymbolKind::ToolModule)),
|
|
Definition::DeriveHelper(_) => Highlight::new(HlTag::Symbol(SymbolKind::DeriveHelper)),
|
|
};
|
|
|
|
let def_crate = def.krate(db);
|
|
let is_from_other_crate = def_crate != Some(krate);
|
|
let is_from_builtin_crate = def_crate.map_or(false, |def_crate| def_crate.is_builtin(db));
|
|
let is_builtin_type = matches!(def, Definition::BuiltinType(_));
|
|
let is_public = def.visibility(db) == Some(hir::Visibility::Public);
|
|
|
|
match (is_from_other_crate, is_builtin_type, is_public) {
|
|
(true, false, _) => h |= HlMod::Library,
|
|
(false, _, true) => h |= HlMod::Public,
|
|
_ => {}
|
|
}
|
|
|
|
if is_from_builtin_crate {
|
|
h |= HlMod::DefaultLibrary;
|
|
}
|
|
|
|
h
|
|
}
|
|
|
|
fn highlight_method_call_by_name_ref(
|
|
sema: &Semantics<'_, RootDatabase>,
|
|
krate: hir::Crate,
|
|
name_ref: &ast::NameRef,
|
|
) -> Option<Highlight> {
|
|
let mc = name_ref.syntax().parent().and_then(ast::MethodCallExpr::cast)?;
|
|
highlight_method_call(sema, krate, &mc)
|
|
}
|
|
|
|
fn highlight_method_call(
|
|
sema: &Semantics<'_, RootDatabase>,
|
|
krate: hir::Crate,
|
|
method_call: &ast::MethodCallExpr,
|
|
) -> Option<Highlight> {
|
|
let func = sema.resolve_method_call(method_call)?;
|
|
|
|
let mut h = SymbolKind::Function.into();
|
|
h |= HlMod::Associated;
|
|
|
|
if func.is_unsafe_to_call(sema.db) || sema.is_unsafe_method_call(method_call) {
|
|
h |= HlMod::Unsafe;
|
|
}
|
|
if func.is_async(sema.db) {
|
|
h |= HlMod::Async;
|
|
}
|
|
if func
|
|
.as_assoc_item(sema.db)
|
|
.and_then(|it| it.containing_trait_or_trait_impl(sema.db))
|
|
.is_some()
|
|
{
|
|
h |= HlMod::Trait;
|
|
}
|
|
|
|
let def_crate = func.module(sema.db).krate();
|
|
let is_from_other_crate = def_crate != krate;
|
|
let is_from_builtin_crate = def_crate.is_builtin(sema.db);
|
|
let is_public = func.visibility(sema.db) == hir::Visibility::Public;
|
|
|
|
if is_from_other_crate {
|
|
h |= HlMod::Library;
|
|
} else if is_public {
|
|
h |= HlMod::Public;
|
|
}
|
|
|
|
if is_from_builtin_crate {
|
|
h |= HlMod::DefaultLibrary;
|
|
}
|
|
|
|
if let Some(self_param) = func.self_param(sema.db) {
|
|
match self_param.access(sema.db) {
|
|
hir::Access::Shared => h |= HlMod::Reference,
|
|
hir::Access::Exclusive => {
|
|
h |= HlMod::Mutable;
|
|
h |= HlMod::Reference;
|
|
}
|
|
hir::Access::Owned => {
|
|
if let Some(receiver_ty) =
|
|
method_call.receiver().and_then(|it| sema.type_of_expr(&it))
|
|
{
|
|
if !receiver_ty.adjusted().is_copy(sema.db) {
|
|
h |= HlMod::Consuming
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Some(h)
|
|
}
|
|
|
|
fn highlight_name_by_syntax(name: ast::Name) -> Highlight {
|
|
let default = HlTag::UnresolvedReference;
|
|
|
|
let parent = match name.syntax().parent() {
|
|
Some(it) => it,
|
|
_ => return default.into(),
|
|
};
|
|
|
|
let tag = match parent.kind() {
|
|
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()
|
|
}
|
|
|
|
fn highlight_name_ref_by_syntax(
|
|
name: ast::NameRef,
|
|
sema: &Semantics<'_, RootDatabase>,
|
|
krate: hir::Crate,
|
|
) -> Highlight {
|
|
let default = HlTag::UnresolvedReference;
|
|
|
|
let parent = match name.syntax().parent() {
|
|
Some(it) => it,
|
|
_ => return default.into(),
|
|
};
|
|
|
|
match parent.kind() {
|
|
METHOD_CALL_EXPR => ast::MethodCallExpr::cast(parent)
|
|
.and_then(|it| highlight_method_call(sema, krate, &it))
|
|
.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| 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 {
|
|
h.into()
|
|
}
|
|
}
|
|
PATH_SEGMENT => {
|
|
let name_based_fallback = || {
|
|
if name.text().chars().next().unwrap_or_default().is_uppercase() {
|
|
SymbolKind::Struct.into()
|
|
} else {
|
|
SymbolKind::Module.into()
|
|
}
|
|
};
|
|
let path = match parent.parent().and_then(ast::Path::cast) {
|
|
Some(it) => it,
|
|
_ => return name_based_fallback(),
|
|
};
|
|
let expr = match path.syntax().parent() {
|
|
Some(parent) => match_ast! {
|
|
match parent {
|
|
ast::PathExpr(path) => path,
|
|
ast::MacroCall(_) => return SymbolKind::Macro.into(),
|
|
_ => return name_based_fallback(),
|
|
}
|
|
},
|
|
// within path, decide whether it is module or adt by checking for uppercase name
|
|
None => return name_based_fallback(),
|
|
};
|
|
let parent = match expr.syntax().parent() {
|
|
Some(it) => it,
|
|
None => return default.into(),
|
|
};
|
|
|
|
match parent.kind() {
|
|
CALL_EXPR => SymbolKind::Function.into(),
|
|
_ => if name.text().chars().next().unwrap_or_default().is_uppercase() {
|
|
SymbolKind::Struct
|
|
} else {
|
|
SymbolKind::Const
|
|
}
|
|
.into(),
|
|
}
|
|
}
|
|
_ => default.into(),
|
|
}
|
|
}
|
|
|
|
fn is_consumed_lvalue(node: &SyntaxNode, local: &hir::Local, db: &RootDatabase) -> bool {
|
|
// When lvalues are passed as arguments and they're not Copy, then mark them as Consuming.
|
|
parents_match(node.clone().into(), &[PATH_SEGMENT, PATH, PATH_EXPR, ARG_LIST])
|
|
&& !local.ty(db).is_copy(db)
|
|
}
|
|
|
|
/// Returns true if the parent nodes of `node` all match the `SyntaxKind`s in `kinds` exactly.
|
|
fn parents_match(mut node: NodeOrToken<SyntaxNode, SyntaxToken>, mut kinds: &[SyntaxKind]) -> bool {
|
|
while let (Some(parent), [kind, rest @ ..]) = (node.parent(), kinds) {
|
|
if parent.kind() != *kind {
|
|
return false;
|
|
}
|
|
|
|
node = parent.into();
|
|
kinds = rest;
|
|
}
|
|
|
|
// Only true if we matched all expected kinds
|
|
kinds.is_empty()
|
|
}
|
|
|
|
fn parent_matches<N: AstNode>(token: &SyntaxToken) -> bool {
|
|
token.parent().map_or(false, |it| N::can_cast(it.kind()))
|
|
}
|