let is_unlinked = sema.to_module_def(file_id).is_none();
let mut bindings_shadow_count: FxHashMap<Name, u32> = FxHashMap::default();
- let mut current_macro_call: Option<ast::MacroCall> = None;
- let mut current_attr_call = None;
- let mut current_derive_call = None;
+ let mut tt_level = 0;
+ let mut attr_or_derive_item = None;
let mut current_macro: Option<ast::Macro> = None;
let mut macro_highlighter = MacroHighlighter::default();
let mut inside_attribute = false;
// Walk all nodes, keeping track of whether we are inside a macro or not.
// If in macro, expand it first and highlight the expanded code.
for event in root.preorder_with_tokens() {
+ use WalkEvent::{Enter, Leave};
+
let range = match &event {
- WalkEvent::Enter(it) | WalkEvent::Leave(it) => it.text_range(),
+ Enter(it) | Leave(it) => it.text_range(),
};
// Element outside of the viewport, no need to highlight
// set macro and attribute highlighting states
match event.clone() {
- WalkEvent::Enter(NodeOrToken::Node(node)) => match ast::Item::cast(node.clone()) {
- Some(ast::Item::MacroCall(mcall)) => {
- current_macro_call = Some(mcall);
- continue;
- }
- Some(ast::Item::MacroRules(mac)) => {
- macro_highlighter.init();
- current_macro = Some(mac.into());
- continue;
- }
- Some(ast::Item::MacroDef(mac)) => {
- macro_highlighter.init();
- current_macro = Some(mac.into());
- continue;
- }
- Some(item) => {
- if matches!(node.kind(), FN | CONST | STATIC) {
- bindings_shadow_count.clear();
+ Enter(NodeOrToken::Node(node)) if ast::TokenTree::can_cast(node.kind()) => {
+ tt_level += 1;
+ }
+ Leave(NodeOrToken::Node(node)) if ast::TokenTree::can_cast(node.kind()) => {
+ tt_level -= 1;
+ }
+ Enter(NodeOrToken::Node(node)) if ast::Attr::can_cast(node.kind()) => {
+ inside_attribute = true
+ }
+ Leave(NodeOrToken::Node(node)) if ast::Attr::can_cast(node.kind()) => {
+ inside_attribute = false
+ }
+
+ Enter(NodeOrToken::Node(node)) if ast::Item::can_cast(node.kind()) => {
+ match ast::Item::cast(node.clone()) {
+ Some(ast::Item::MacroRules(mac)) => {
+ macro_highlighter.init();
+ current_macro = Some(mac.into());
+ continue;
}
+ Some(ast::Item::MacroDef(mac)) => {
+ macro_highlighter.init();
+ current_macro = Some(mac.into());
+ continue;
+ }
+ Some(item) => {
+ if matches!(node.kind(), FN | CONST | STATIC) {
+ bindings_shadow_count.clear();
+ }
- if sema.is_attr_macro_call(&item) {
- current_attr_call = Some(item);
- } else if current_attr_call.is_none() {
- let adt = match item {
- ast::Item::Enum(it) => Some(ast::Adt::Enum(it)),
- ast::Item::Struct(it) => Some(ast::Adt::Struct(it)),
- ast::Item::Union(it) => Some(ast::Adt::Union(it)),
- _ => None,
- };
- match adt {
- Some(adt) if sema.is_derive_annotated(&adt) => {
- current_derive_call = Some(ast::Item::from(adt));
+ if attr_or_derive_item.is_none() {
+ if sema.is_attr_macro_call(&item) {
+ attr_or_derive_item = Some(item);
+ } else {
+ let adt = match item {
+ ast::Item::Enum(it) => Some(ast::Adt::Enum(it)),
+ ast::Item::Struct(it) => Some(ast::Adt::Struct(it)),
+ ast::Item::Union(it) => Some(ast::Adt::Union(it)),
+ _ => None,
+ };
+ match adt {
+ Some(adt) if sema.is_derive_annotated(&adt) => {
+ attr_or_derive_item = Some(ast::Item::from(adt));
+ }
+ _ => (),
+ }
}
- _ => (),
}
}
+ _ => (),
}
- None if ast::Attr::can_cast(node.kind()) => inside_attribute = true,
- _ => (),
- },
- WalkEvent::Leave(NodeOrToken::Node(node)) => match ast::Item::cast(node.clone()) {
- Some(ast::Item::MacroCall(mcall)) => {
- assert_eq!(current_macro_call, Some(mcall));
- current_macro_call = None;
- }
- Some(ast::Item::MacroRules(mac)) => {
- assert_eq!(current_macro, Some(mac.into()));
- current_macro = None;
- macro_highlighter = MacroHighlighter::default();
- }
- Some(ast::Item::MacroDef(mac)) => {
- assert_eq!(current_macro, Some(mac.into()));
- current_macro = None;
- macro_highlighter = MacroHighlighter::default();
- }
- Some(item) if current_attr_call.as_ref().map_or(false, |it| *it == item) => {
- current_attr_call = None;
- }
- Some(item) if current_derive_call.as_ref().map_or(false, |it| *it == item) => {
- current_derive_call = None;
+ }
+ Leave(NodeOrToken::Node(node)) if ast::Item::can_cast(node.kind()) => {
+ match ast::Item::cast(node.clone()) {
+ Some(ast::Item::MacroRules(mac)) => {
+ assert_eq!(current_macro, Some(mac.into()));
+ current_macro = None;
+ macro_highlighter = MacroHighlighter::default();
+ }
+ Some(ast::Item::MacroDef(mac)) => {
+ assert_eq!(current_macro, Some(mac.into()));
+ current_macro = None;
+ macro_highlighter = MacroHighlighter::default();
+ }
+ Some(item) if attr_or_derive_item.as_ref().map_or(false, |it| *it == item) => {
+ attr_or_derive_item = None;
+ }
+ _ => (),
}
- None if ast::Attr::can_cast(node.kind()) => inside_attribute = false,
- _ => (),
- },
+ }
_ => (),
}
let element = match event {
- WalkEvent::Enter(NodeOrToken::Token(tok)) if tok.kind() == WHITESPACE => continue,
- WalkEvent::Enter(it) => it,
- WalkEvent::Leave(NodeOrToken::Token(_)) => continue,
- WalkEvent::Leave(NodeOrToken::Node(node)) => {
+ Enter(NodeOrToken::Token(tok)) if tok.kind() == WHITESPACE => continue,
+ Enter(it) => it,
+ Leave(NodeOrToken::Token(_)) => continue,
+ Leave(NodeOrToken::Node(node)) => {
// Doc comment highlighting injection, we do this when leaving the node
// so that we overwrite the highlighting of the doc comment itself.
inject::doc_comment(hl, sema, InFile::new(file_id.into(), &node));
// Descending tokens into macros is expensive even if no descending occurs, so make sure
// that we actually are in a position where descending is possible.
- let in_macro = current_macro_call.is_some()
- || current_derive_call.is_some()
- || current_attr_call.is_some();
+ let in_macro = tt_level > 0 || attr_or_derive_item.is_some();
let descended_element = if in_macro {
// Attempt to descend tokens into macro-calls.
match element {
NodeOrToken::Token(token) if token.kind() != COMMENT => {
- // For function-like macro calls and derive attributes, only attempt to descend if
- // we are inside their token-trees.
- let in_tt = current_attr_call.is_some()
- || token.parent().as_ref().map(SyntaxNode::kind) == Some(TOKEN_TREE);
-
- if in_tt {
- let token = sema.descend_into_macros_single(token);
- match token.parent().and_then(ast::NameLike::cast) {
- // Remap the token into the wrapping single token nodes
- // FIXME: if the node doesn't resolve, we also won't do token based highlighting!
- Some(parent) => match (token.kind(), parent.syntax().kind()) {
- (T![self] | T![ident], NAME | NAME_REF) => {
- NodeOrToken::Node(parent)
- }
- (T![self] | T![super] | T![crate] | T![Self], NAME_REF) => {
- NodeOrToken::Node(parent)
- }
- (INT_NUMBER, NAME_REF) => NodeOrToken::Node(parent),
- (LIFETIME_IDENT, LIFETIME) => NodeOrToken::Node(parent),
- _ => NodeOrToken::Token(token),
- },
- None => NodeOrToken::Token(token),
- }
- } else {
- NodeOrToken::Token(token)
+ let token = sema.descend_into_macros_single(token);
+ match token.parent().and_then(ast::NameLike::cast) {
+ // Remap the token into the wrapping single token nodes
+ // FIXME: if the node doesn't resolve, we also won't do token based highlighting!
+ Some(parent) => match (token.kind(), parent.syntax().kind()) {
+ (T![self] | T![ident], NAME | NAME_REF) => NodeOrToken::Node(parent),
+ (T![self] | T![super] | T![crate] | T![Self], NAME_REF) => {
+ NodeOrToken::Node(parent)
+ }
+ (INT_NUMBER, NAME_REF) => NodeOrToken::Node(parent),
+ (LIFETIME_IDENT, LIFETIME) => NodeOrToken::Node(parent),
+ _ => NodeOrToken::Token(token),
+ },
+ None => NodeOrToken::Token(token),
}
}
e => e,
projects / rust.git / commitdiff