8279: Added initial implementation for

Operator semantic highlighting.

3 files changed, 77 insertions, 15 deletions

diff --git a/crates/ide/src/lib.rs b/crates/ide/src/lib.rs
index 3f73c0632..b5ae51d28 100644
--- a/crates/ide/src/lib.rs
+++ b/crates/ide/src/lib.rs
@@ -82,7 +82,7 @@ pub use crate::{
     references::{rename::RenameError, ReferenceSearchResult},
     runnables::{Runnable, RunnableKind, TestId},
     syntax_highlighting::{
-        tags::{Highlight, HlMod, HlMods, HlPunct, HlTag},
+        tags::{Highlight, HlMod, HlMods, HlOperator, HlPunct, HlTag},
         HlRange,
     },
 };
diff --git a/crates/ide/src/syntax_highlighting/highlight.rs b/crates/ide/src/syntax_highlighting/highlight.rs
index 5ccb84714..7734ea301 100644
--- a/crates/ide/src/syntax_highlighting/highlight.rs
+++ b/crates/ide/src/syntax_highlighting/highlight.rs
@@ -12,7 +12,10 @@ use syntax::{
     SyntaxNode, SyntaxToken, T,
 };
 
-use crate::{syntax_highlighting::tags::HlPunct, Highlight, HlMod, HlTag};
+use crate::{
+    syntax_highlighting::tags::{HlOperator, HlPunct},
+    Highlight, HlMod, HlTag,
+};
 
 pub(super) fn element(
     sema: &Semantics<RootDatabase>,
@@ -132,7 +135,7 @@ pub(super) fn element(
         INT_NUMBER | FLOAT_NUMBER => HlTag::NumericLiteral.into(),
         BYTE => HlTag::ByteLiteral.into(),
         CHAR => HlTag::CharLiteral.into(),
-        QUESTION => Highlight::new(HlTag::Operator) | HlMod::ControlFlow,
+        QUESTION => Highlight::new(HlTag::Operator(HlOperator::Other)) | HlMod::ControlFlow,
         LIFETIME => {
             let lifetime = element.into_node().and_then(ast::Lifetime::cast).unwrap();
 
@@ -146,8 +149,11 @@ pub(super) fn element(
             }
         }
         p if p.is_punct() => match p {
+            T![&] if element.parent().and_then(ast::BinExpr::cast).is_some() => {
+                HlTag::Operator(HlOperator::Bitwise).into()
+            }
             T![&] => {
-                let h = HlTag::Operator.into();
+                let h = HlTag::Operator(HlOperator::Other).into();
                 let is_unsafe = element
                     .parent()
                     .and_then(ast::RefExpr::cast)
@@ -159,13 +165,21 @@ pub(super) fn element(
                     h
                 }
             }
-            T![::] | T![->] | T![=>] | T![..] | T![=] | T![@] | T![.] => HlTag::Operator.into(),
+            T![::] | T![->] | T![=>] | T![..] | T![=] | T![@] | T![.] => {
+                HlTag::Operator(HlOperator::Other).into()
+            }
             T![!] if element.parent().and_then(ast::MacroCall::cast).is_some() => {
+                eprintln!("in macro call: {}", element);
                 HlTag::Symbol(SymbolKind::Macro).into()
             }
             T![!] if element.parent().and_then(ast::NeverType::cast).is_some() => {
+                eprintln!("in never type : {}", element);
                 HlTag::BuiltinType.into()
             }
+            T![!] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
+                eprintln!("pre expr for : {}", element);
+                HlTag::Operator(HlOperator::Bitwise).into()
+            }
             T![*] if element.parent().and_then(ast::PtrType::cast).is_some() => {
                 HlTag::Keyword.into()
             }
@@ -175,32 +189,60 @@ pub(super) fn element(
                 let expr = prefix_expr.expr()?;
                 let ty = sema.type_of_expr(&expr)?;
                 if ty.is_raw_ptr() {
-                    HlTag::Operator | HlMod::Unsafe
+                    HlTag::Operator(HlOperator::Other) | HlMod::Unsafe
                 } else if let Some(ast::PrefixOp::Deref) = prefix_expr.op_kind() {
-                    HlTag::Operator.into()
+                    HlTag::Operator(HlOperator::Other).into()
                 } else {
                     HlTag::Punctuation(HlPunct::Other).into()
                 }
             }
             T![-] if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
+                eprintln!("the - operator: {}", element);
                 let prefix_expr = element.parent().and_then(ast::PrefixExpr::cast)?;
 
                 let expr = prefix_expr.expr()?;
                 match expr {
                     ast::Expr::Literal(_) => HlTag::NumericLiteral,
-                    _ => HlTag::Operator,
+                    _ => HlTag::Operator(HlOperator::Other),
                 }
                 .into()
             }
             _ if element.parent().and_then(ast::PrefixExpr::cast).is_some() => {
-                HlTag::Operator.into()
+                eprintln!("the prefix expr block: {}", element);
+                HlTag::Operator(HlOperator::Other).into()
+            }
+            T![+] | T![-] | T![*] | T![/] | T![+=] | T![-=] | T![*=] | T![/=]
+                if element.parent().and_then(ast::BinExpr::cast).is_some() =>
+            {
+                HlTag::Operator(HlOperator::Arithmetic).into()
+            }
+            T![|] | T![&] | T![!] | T![^] | T![|=] | T![&=] | T![^=]
+                if element.parent().and_then(ast::BinExpr::cast).is_some() =>
+            {
+                HlTag::Operator(HlOperator::Bitwise).into()
+            }
+            T![&&] | T![||] if element.parent().and_then(ast::BinExpr::cast).is_some() => {
+                HlTag::Operator(HlOperator::Logical).into()
+            }
+            T![>] | T![<] | T![==] | T![>=] | T![<=] | T![!=]
+                if element.parent().and_then(ast::BinExpr::cast).is_some() =>
+            {
+                HlTag::Operator(HlOperator::Comparision).into()
+            }
+            _ if element.parent().and_then(ast::BinExpr::cast).is_some() => {
+                eprintln!("the bin expr : {}", element);
+                HlTag::Operator(HlOperator::Other).into()
             }
-            _ if element.parent().and_then(ast::BinExpr::cast).is_some() => HlTag::Operator.into(),
             _ if element.parent().and_then(ast::RangeExpr::cast).is_some() => {
-                HlTag::Operator.into()
+                eprintln!("the range expr block: {}", element);
+                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::RangePat::cast).is_some() => HlTag::Operator.into(),
-            _ if element.parent().and_then(ast::RestPat::cast).is_some() => HlTag::Operator.into(),
             _ if element.parent().and_then(ast::Attr::cast).is_some() => HlTag::Attribute.into(),
             kind => HlTag::Punctuation(match kind {
                 T!['['] | T![']'] => HlPunct::Bracket,
diff --git a/crates/ide/src/syntax_highlighting/tags.rs b/crates/ide/src/syntax_highlighting/tags.rs
index 1cec991aa..8128d231d 100644
--- a/crates/ide/src/syntax_highlighting/tags.rs
+++ b/crates/ide/src/syntax_highlighting/tags.rs
@@ -28,7 +28,7 @@ pub enum HlTag {
     FormatSpecifier,
     Keyword,
     NumericLiteral,
-    Operator,
+    Operator(HlOperator),
     Punctuation(HlPunct),
     StringLiteral,
     UnresolvedReference,
@@ -87,6 +87,20 @@ pub enum HlPunct {
     Other,
 }
 
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub enum HlOperator {
+    /// |, &, !, ^, |=, &=, ^=
+    Bitwise,
+    /// +, -, *, /, +=, -=, *=, /=
+    Arithmetic,
+    /// &&, ||, !
+    Logical,
+    /// >, <, ==, >=, <=, !=
+    Comparision,
+    ///
+    Other,
+}
+
 impl HlTag {
     fn as_str(self) -> &'static str {
         match self {
@@ -133,7 +147,13 @@ impl HlTag {
                 HlPunct::Other => "punctuation",
             },
             HlTag::NumericLiteral => "numeric_literal",
-            HlTag::Operator => "operator",
+            HlTag::Operator(op) => match op {
+                HlOperator::Bitwise => "bitwise",
+                HlOperator::Arithmetic => "arithmetic",
+                HlOperator::Logical => "logical",
+                HlOperator::Comparision => "comparision",
+                HlOperator::Other => "operator",
+            },
             HlTag::StringLiteral => "string_literal",
             HlTag::UnresolvedReference => "unresolved_reference",
             HlTag::None => "none",