bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide/src/syntax_highlighting/macro_.rs')
-rw-r--r--crates/ide/src/syntax_highlighting/macro_.rs128
1 files changed, 0 insertions, 128 deletions
diff --git a/crates/ide/src/syntax_highlighting/macro_.rs b/crates/ide/src/syntax_highlighting/macro_.rs
deleted file mode 100644
index b441b4cc90..0000000000
--- a/crates/ide/src/syntax_highlighting/macro_.rs
+++ /dev/null
@@ -1,128 +0,0 @@
-//! Syntax highlighting for macro_rules!.
-use syntax::{SyntaxKind, SyntaxToken, TextRange, T};
-
-use crate::{HlRange, HlTag};
-
-#[derive(Default)]
-pub(super) struct MacroHighlighter {
- state: Option<MacroMatcherParseState>,
-}
-
-impl MacroHighlighter {
- pub(super) fn init(&mut self) {
- self.state = Some(MacroMatcherParseState::default());
- }
-
- pub(super) fn advance(&mut self, token: &SyntaxToken) {
- if let Some(state) = self.state.as_mut() {
- update_macro_state(state, token);
- }
- }
-
- pub(super) fn highlight(&self, token: &SyntaxToken) -> Option<HlRange> {
- if let Some(state) = self.state.as_ref() {
- if matches!(state.rule_state, RuleState::Matcher | RuleState::Expander) {
- if let Some(range) = is_metavariable(token) {
- return Some(HlRange {
- range,
- highlight: HlTag::UnresolvedReference.into(),
- binding_hash: None,
- });
- }
- }
- }
- None
- }
-}
-
-struct MacroMatcherParseState {
- /// Opening and corresponding closing bracket of the matcher or expander of the current rule
- paren_ty: Option<(SyntaxKind, SyntaxKind)>,
- paren_level: usize,
- rule_state: RuleState,
- /// Whether we are inside the outer `{` `}` macro block that holds the rules
- in_invoc_body: bool,
-}
-
-impl Default for MacroMatcherParseState {
- fn default() -> Self {
- MacroMatcherParseState {
- paren_ty: None,
- paren_level: 0,
- in_invoc_body: false,
- rule_state: RuleState::None,
- }
- }
-}
-
-#[derive(Copy, Clone, Debug, PartialEq)]
-enum RuleState {
- Matcher,
- Expander,
- Between,
- None,
-}
-
-impl RuleState {
- fn transition(&mut self) {
- *self = match self {
- RuleState::Matcher => RuleState::Between,
- RuleState::Expander => RuleState::None,
- RuleState::Between => RuleState::Expander,
- RuleState::None => RuleState::Matcher,
- };
- }
-}
-
-fn update_macro_state(state: &mut MacroMatcherParseState, tok: &SyntaxToken) {
- if !state.in_invoc_body {
- if tok.kind() == T!['{'] || tok.kind() == T!['('] {
- state.in_invoc_body = true;
- }
- return;
- }
-
- match state.paren_ty {
- Some((open, close)) => {
- if tok.kind() == open {
- state.paren_level += 1;
- } else if tok.kind() == close {
- state.paren_level -= 1;
- if state.paren_level == 0 {
- state.rule_state.transition();
- state.paren_ty = None;
- }
- }
- }
- None => {
- match tok.kind() {
- T!['('] => {
- state.paren_ty = Some((T!['('], T![')']));
- }
- T!['{'] => {
- state.paren_ty = Some((T!['{'], T!['}']));
- }
- T!['['] => {
- state.paren_ty = Some((T!['['], T![']']));
- }
- _ => (),
- }
- if state.paren_ty.is_some() {
- state.paren_level = 1;
- state.rule_state.transition();
- }
- }
- }
-}
-
-fn is_metavariable(token: &SyntaxToken) -> Option<TextRange> {
- match token.kind() {
- kind if kind.is_any_identifier() => {
- if let Some(_dollar) = token.prev_token().filter(|t| t.kind() == T![$]) {
- return Some(token.text_range());
- }
- }
- _ => (),
- };
- None
-}