64 files changed, 889 insertions, 770 deletions
diff --git a/crates/assists/src/assist_context.rs b/crates/assists/src/assist_context.rs
index d11fee196..fcfe2d6ee 100644
--- a/crates/assists/src/assist_context.rs
+++ b/crates/assists/src/assist_context.rs
@@ -12,7 +12,7 @@ use ide_db::{
 };
 use syntax::{
    algo::{self, find_node_at_offset, SyntaxRewriter},
-    AstNode, SourceFile, SyntaxElement, SyntaxKind, SyntaxToken, TextRange, TextSize,
+    AstNode, AstToken, SourceFile, SyntaxElement, SyntaxKind, SyntaxToken, TextRange, TextSize,
    TokenAtOffset,
 };
 use text_edit::{TextEdit, TextEditBuilder};
@@ -81,9 +81,12 @@ impl<'a> AssistContext<'a> {
    pub(crate) fn token_at_offset(&self) -> TokenAtOffset<SyntaxToken> {
        self.source_file.syntax().token_at_offset(self.offset())
    }
-    pub(crate) fn find_token_at_offset(&self, kind: SyntaxKind) -> Option<SyntaxToken> {
+    pub(crate) fn find_token_syntax_at_offset(&self, kind: SyntaxKind) -> Option<SyntaxToken> {
        self.token_at_offset().find(|it| it.kind() == kind)
    }
+    pub(crate) fn find_token_at_offset<T: AstToken>(&self) -> Option<T> {
+        self.token_at_offset().find_map(T::cast)
+    }
    pub(crate) fn find_node_at_offset<N: AstNode>(&self) -> Option<N> {
        find_node_at_offset(self.source_file.syntax(), self.offset())
    }
diff --git a/crates/assists/src/handlers/add_turbo_fish.rs b/crates/assists/src/handlers/add_turbo_fish.rs
index e3d84d698..1f486c013 100644
--- a/crates/assists/src/handlers/add_turbo_fish.rs
+++ b/crates/assists/src/handlers/add_turbo_fish.rs
@@ -25,7 +25,7 @@ use crate::{
 // }
 // ```
 pub(crate) fn add_turbo_fish(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let ident = ctx.find_token_at_offset(SyntaxKind::IDENT).or_else(|| {
+    let ident = ctx.find_token_syntax_at_offset(SyntaxKind::IDENT).or_else(|| {
        let arg_list = ctx.find_node_at_offset::<ast::ArgList>()?;
        if arg_list.args().count() > 0 {
            return None;
diff --git a/crates/assists/src/handlers/change_return_type_to_result.rs b/crates/assists/src/handlers/change_return_type_to_result.rs
index be480943c..76f33a5b6 100644
--- a/crates/assists/src/handlers/change_return_type_to_result.rs
+++ b/crates/assists/src/handlers/change_return_type_to_result.rs
@@ -2,7 +2,7 @@ use std::iter;
 use syntax::{
    ast::{self, make, BlockExpr, Expr, LoopBodyOwner},
-    AstNode, SyntaxNode,
+    match_ast, AstNode, SyntaxNode,
 };
 use test_utils::mark;
@@ -21,8 +21,18 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // ```
 pub(crate) fn change_return_type_to_result(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
    let ret_type = ctx.find_node_at_offset::<ast::RetType>()?;
-    // FIXME: extend to lambdas as well
+    let parent = ret_type.syntax().parent()?;
-    let fn_def = ret_type.syntax().parent().and_then(ast::Fn::cast)?;
+    let block_expr = match_ast! {
+        match parent {
+            ast::Fn(func) => func.body()?,
+            ast::ClosureExpr(closure) => match closure.body()? {
+                Expr::BlockExpr(block) => block,
+                // closures require a block when a return type is specified
+                _ => return None,
+            },
+            _ => return None,
+        }
+    };
    let type_ref = &ret_type.ty()?;
    let ret_type_str = type_ref.syntax().text().to_string();
@@ -34,16 +44,14 @@ pub(crate) fn change_return_type_to_result(acc: &mut Assists, ctx: &AssistContex
        }
    }
-    let block_expr = &fn_def.body()?;
    acc.add(
        AssistId("change_return_type_to_result", AssistKind::RefactorRewrite),
        "Wrap return type in Result",
        type_ref.syntax().text_range(),
        |builder| {
            let mut tail_return_expr_collector = TailReturnCollector::new();
-            tail_return_expr_collector.collect_jump_exprs(block_expr, false);
+            tail_return_expr_collector.collect_jump_exprs(&block_expr, false);
-            tail_return_expr_collector.collect_tail_exprs(block_expr);
+            tail_return_expr_collector.collect_tail_exprs(&block_expr);
            for ret_expr_arg in tail_return_expr_collector.exprs_to_wrap {
                let ok_wrapped = make::expr_call(
@@ -285,16 +293,20 @@ mod tests {
    }
    #[test]
-    fn change_return_type_to_result_simple_return_type() {
+    fn change_return_type_to_result_simple_closure() {
        check_assist(
            change_return_type_to_result,
-            r#"fn foo() -> i32<|> {
+            r#"fn foo() {
-                let test = "test";
+                || -> i32<|> {
-                return 42i32;
+                    let test = "test";
+                    return 42i32;
+                };
            }"#,
-            r#"fn foo() -> Result<i32, ${0:_}> {
+            r#"fn foo() {
-                let test = "test";
+                || -> Result<i32, ${0:_}> {
-                return Ok(42i32);
+                    let test = "test";
+                    return Ok(42i32);
+                };
            }"#,
        );
    }
@@ -311,6 +323,29 @@ mod tests {
    }
    #[test]
+    fn change_return_type_to_result_simple_return_type_bad_cursor_closure() {
+        check_assist_not_applicable(
+            change_return_type_to_result,
+            r#"fn foo() {
+                || -> i32 {
+                    let test = "test";<|>
+                    return 42i32;
+                };
+            }"#,
+        );
+    }
+    #[test]
+    fn change_return_type_to_result_closure_non_block() {
+        check_assist_not_applicable(
+            change_return_type_to_result,
+            r#"fn foo() {
+                || -> i<|>32 3;
+            }"#,
+        );
+    }
+    #[test]
    fn change_return_type_to_result_simple_return_type_already_result_std() {
        check_assist_not_applicable(
            change_return_type_to_result,
@@ -334,6 +369,19 @@ mod tests {
    }
    #[test]
+    fn change_return_type_to_result_simple_return_type_already_result_closure() {
+        check_assist_not_applicable(
+            change_return_type_to_result,
+            r#"fn foo() {
+                || -> Result<i32<|>, String> {
+                    let test = "test";
+                    return 42i32;
+                };
+            }"#,
+        );
+    }
+    #[test]
    fn change_return_type_to_result_simple_with_cursor() {
        check_assist(
            change_return_type_to_result,
@@ -364,6 +412,25 @@ mod tests {
    }
    #[test]
+    fn change_return_type_to_result_simple_with_tail_closure() {
+        check_assist(
+            change_return_type_to_result,
+            r#"fn foo() {
+                || -><|> i32 {
+                    let test = "test";
+                    42i32
+                };
+            }"#,
+            r#"fn foo() {
+                || -> Result<i32, ${0:_}> {
+                    let test = "test";
+                    Ok(42i32)
+                };
+            }"#,
+        );
+    }
+    #[test]
    fn change_return_type_to_result_simple_with_tail_only() {
        check_assist(
            change_return_type_to_result,
@@ -375,6 +442,7 @@ mod tests {
            }"#,
        );
    }
    #[test]
    fn change_return_type_to_result_simple_with_tail_block_like() {
        check_assist(
@@ -397,6 +465,31 @@ mod tests {
    }
    #[test]
+    fn change_return_type_to_result_simple_without_block_closure() {
+        check_assist(
+            change_return_type_to_result,
+            r#"fn foo() {
+                || -> i32<|> {
+                    if true {
+                        42i32
+                    } else {
+                        24i32
+                    }
+                };
+            }"#,
+            r#"fn foo() {
+                || -> Result<i32, ${0:_}> {
+                    if true {
+                        Ok(42i32)
+                    } else {
+                        Ok(24i32)
+                    }
+                };
+            }"#,
+        );
+    }
+    #[test]
    fn change_return_type_to_result_simple_with_nested_if() {
        check_assist(
            change_return_type_to_result,
diff --git a/crates/assists/src/handlers/convert_integer_literal.rs b/crates/assists/src/handlers/convert_integer_literal.rs
index c8af80701..667115382 100644
--- a/crates/assists/src/handlers/convert_integer_literal.rs
+++ b/crates/assists/src/handlers/convert_integer_literal.rs
@@ -1,4 +1,4 @@
-use syntax::{ast, ast::Radix, AstNode};
+use syntax::{ast, ast::Radix, AstToken};
 use crate::{AssistContext, AssistId, AssistKind, Assists, GroupLabel};
@@ -15,14 +15,16 @@ use crate::{AssistContext, AssistId, AssistKind, Assists, GroupLabel};
 // ```
 pub(crate) fn convert_integer_literal(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
    let literal = ctx.find_node_at_offset::<ast::Literal>()?;
-    let (radix, value) = literal.int_value()?;
+    let literal = match literal.kind() {
+        ast::LiteralKind::IntNumber(it) => it,
+        _ => return None,
+    };
+    let radix = literal.radix();
+    let value = literal.value()?;
+    let suffix = literal.suffix();
    let range = literal.syntax().text_range();
    let group_id = GroupLabel("Convert integer base".into());
-    let suffix = match literal.kind() {
-        ast::LiteralKind::IntNumber { suffix } => suffix,
-        _ => return None,
-    };
    for &target_radix in Radix::ALL {
        if target_radix == radix {
@@ -36,16 +38,11 @@ pub(crate) fn convert_integer_literal(acc: &mut Assists, ctx: &AssistContext) ->
            Radix::Hexadecimal => format!("0x{:X}", value),
        };
-        let label = format!(
+        let label = format!("Convert {} to {}{}", literal, converted, suffix.unwrap_or_default());
-            "Convert {} to {}{}",
-            literal,
-            converted,
-            suffix.as_deref().unwrap_or_default()
-        );
        // Appends the type suffix back into the new literal if it exists.
-        if let Some(suffix) = &suffix {
+        if let Some(suffix) = suffix {
-            converted.push_str(&suffix);
+            converted.push_str(suffix);
        }
        acc.add_group(
@@ -132,34 +129,6 @@ mod tests {
        );
    }
-    // Decimal numbers under 3 digits have a special case where they return early because we can't fit a
-    // other base's prefix, so we have a separate test for that.
-    #[test]
-    fn convert_small_decimal_integer() {
-        let before = "const _: i32 = 10<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b1010;",
-            "Convert 10 to 0b1010",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o12;",
-            "Convert 10 to 0o12",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xA;",
-            "Convert 10 to 0xA",
-        );
-    }
    #[test]
    fn convert_hexadecimal_integer() {
        let before = "const _: i32 = 0xFF<|>;";
@@ -239,7 +208,7 @@ mod tests {
    }
    #[test]
-    fn convert_decimal_integer_with_underscores() {
+    fn convert_integer_with_underscores() {
        let before = "const _: i32 = 1_00_0<|>;";
        check_assist_by_label(
@@ -265,111 +234,7 @@ mod tests {
    }
    #[test]
-    fn convert_small_decimal_integer_with_underscores() {
+    fn convert_integer_with_suffix() {
-        let before = "const _: i32 = 1_0<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b1010;",
-            "Convert 1_0 to 0b1010",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o12;",
-            "Convert 1_0 to 0o12",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xA;",
-            "Convert 1_0 to 0xA",
-        );
-    }
-    #[test]
-    fn convert_hexadecimal_integer_with_underscores() {
-        let before = "const _: i32 = 0x_F_F<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b11111111;",
-            "Convert 0x_F_F to 0b11111111",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o377;",
-            "Convert 0x_F_F to 0o377",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255;",
-            "Convert 0x_F_F to 255",
-        );
-    }
-    #[test]
-    fn convert_binary_integer_with_underscores() {
-        let before = "const _: i32 = 0b1111_1111<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o377;",
-            "Convert 0b1111_1111 to 0o377",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255;",
-            "Convert 0b1111_1111 to 255",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xFF;",
-            "Convert 0b1111_1111 to 0xFF",
-        );
-    }
-    #[test]
-    fn convert_octal_integer_with_underscores() {
-        let before = "const _: i32 = 0o3_77<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b11111111;",
-            "Convert 0o3_77 to 0b11111111",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255;",
-            "Convert 0o3_77 to 255",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xFF;",
-            "Convert 0o3_77 to 0xFF",
-        );
-    }
-    #[test]
-    fn convert_decimal_integer_with_suffix() {
        let before = "const _: i32 = 1000i32<|>;";
        check_assist_by_label(
@@ -395,240 +260,6 @@ mod tests {
    }
    #[test]
-    fn convert_small_decimal_integer_with_suffix() {
-        let before = "const _: i32 = 10i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b1010i32;",
-            "Convert 10i32 to 0b1010i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o12i32;",
-            "Convert 10i32 to 0o12i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xAi32;",
-            "Convert 10i32 to 0xAi32",
-        );
-    }
-    #[test]
-    fn convert_hexadecimal_integer_with_suffix() {
-        let before = "const _: i32 = 0xFFi32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b11111111i32;",
-            "Convert 0xFFi32 to 0b11111111i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o377i32;",
-            "Convert 0xFFi32 to 0o377i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255i32;",
-            "Convert 0xFFi32 to 255i32",
-        );
-    }
-    #[test]
-    fn convert_binary_integer_with_suffix() {
-        let before = "const _: i32 = 0b11111111i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o377i32;",
-            "Convert 0b11111111i32 to 0o377i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255i32;",
-            "Convert 0b11111111i32 to 255i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xFFi32;",
-            "Convert 0b11111111i32 to 0xFFi32",
-        );
-    }
-    #[test]
-    fn convert_octal_integer_with_suffix() {
-        let before = "const _: i32 = 0o377i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b11111111i32;",
-            "Convert 0o377i32 to 0b11111111i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255i32;",
-            "Convert 0o377i32 to 255i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xFFi32;",
-            "Convert 0o377i32 to 0xFFi32",
-        );
-    }
-    #[test]
-    fn convert_decimal_integer_with_underscores_and_suffix() {
-        let before = "const _: i32 = 1_00_0i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b1111101000i32;",
-            "Convert 1_00_0i32 to 0b1111101000i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o1750i32;",
-            "Convert 1_00_0i32 to 0o1750i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0x3E8i32;",
-            "Convert 1_00_0i32 to 0x3E8i32",
-        );
-    }
-    #[test]
-    fn convert_small_decimal_integer_with_underscores_and_suffix() {
-        let before = "const _: i32 = 1_0i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b1010i32;",
-            "Convert 1_0i32 to 0b1010i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o12i32;",
-            "Convert 1_0i32 to 0o12i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xAi32;",
-            "Convert 1_0i32 to 0xAi32",
-        );
-    }
-    #[test]
-    fn convert_hexadecimal_integer_with_underscores_and_suffix() {
-        let before = "const _: i32 = 0x_F_Fi32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b11111111i32;",
-            "Convert 0x_F_Fi32 to 0b11111111i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o377i32;",
-            "Convert 0x_F_Fi32 to 0o377i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255i32;",
-            "Convert 0x_F_Fi32 to 255i32",
-        );
-    }
-    #[test]
-    fn convert_binary_integer_with_underscores_and_suffix() {
-        let before = "const _: i32 = 0b1111_1111i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0o377i32;",
-            "Convert 0b1111_1111i32 to 0o377i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255i32;",
-            "Convert 0b1111_1111i32 to 255i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xFFi32;",
-            "Convert 0b1111_1111i32 to 0xFFi32",
-        );
-    }
-    #[test]
-    fn convert_octal_integer_with_underscores_and_suffix() {
-        let before = "const _: i32 = 0o3_77i32<|>;";
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0b11111111i32;",
-            "Convert 0o3_77i32 to 0b11111111i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 255i32;",
-            "Convert 0o3_77i32 to 255i32",
-        );
-        check_assist_by_label(
-            convert_integer_literal,
-            before,
-            "const _: i32 = 0xFFi32;",
-            "Convert 0o3_77i32 to 0xFFi32",
-        );
-    }
-    #[test]
    fn convert_overflowing_literal() {
        let before = "const _: i32 =
            111111111111111111111111111111111111111111111111111111111111111111111111<|>;";
diff --git a/crates/assists/src/handlers/expand_glob_import.rs b/crates/assists/src/handlers/expand_glob_import.rs
index 316a58d88..853266395 100644
--- a/crates/assists/src/handlers/expand_glob_import.rs
+++ b/crates/assists/src/handlers/expand_glob_import.rs
@@ -41,7 +41,7 @@ use crate::{
 // fn qux(bar: Bar, baz: Baz) {}
 // ```
 pub(crate) fn expand_glob_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let star = ctx.find_token_at_offset(T![*])?;
+    let star = ctx.find_token_syntax_at_offset(T![*])?;
    let (parent, mod_path) = find_parent_and_path(&star)?;
    let target_module = match ctx.sema.resolve_path(&mod_path)? {
        PathResolution::Def(ModuleDef::Module(it)) => it,
diff --git a/crates/assists/src/handlers/flip_comma.rs b/crates/assists/src/handlers/flip_comma.rs
index 5c69db53e..64b4b1a76 100644
--- a/crates/assists/src/handlers/flip_comma.rs
+++ b/crates/assists/src/handlers/flip_comma.rs
@@ -18,7 +18,7 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // }
 // ```
 pub(crate) fn flip_comma(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let comma = ctx.find_token_at_offset(T![,])?;
+    let comma = ctx.find_token_syntax_at_offset(T![,])?;
    let prev = non_trivia_sibling(comma.clone().into(), Direction::Prev)?;
    let next = non_trivia_sibling(comma.clone().into(), Direction::Next)?;
diff --git a/crates/assists/src/handlers/flip_trait_bound.rs b/crates/assists/src/handlers/flip_trait_bound.rs
index 347e79b1d..92ee42181 100644
--- a/crates/assists/src/handlers/flip_trait_bound.rs
+++ b/crates/assists/src/handlers/flip_trait_bound.rs
@@ -20,7 +20,7 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 pub(crate) fn flip_trait_bound(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
    // We want to replicate the behavior of `flip_binexpr` by only suggesting
    // the assist when the cursor is on a `+`
-    let plus = ctx.find_token_at_offset(T![+])?;
+    let plus = ctx.find_token_syntax_at_offset(T![+])?;
    // Make sure we're in a `TypeBoundList`
    if ast::TypeBoundList::cast(plus.parent()).is_none() {
diff --git a/crates/assists/src/handlers/infer_function_return_type.rs b/crates/assists/src/handlers/infer_function_return_type.rs
new file mode 100644
index 000000000..520d07ae0
--- /dev/null
+++ b/crates/assists/src/handlers/infer_function_return_type.rs
@@ -0,0 +1,337 @@
+use hir::HirDisplay;
+use syntax::{ast, AstNode, TextRange, TextSize};
+use test_utils::mark;
+use crate::{AssistContext, AssistId, AssistKind, Assists};
+// Assist: infer_function_return_type
+//
+// Adds the return type to a function or closure inferred from its tail expression if it doesn't have a return
+// type specified. This assists is useable in a functions or closures tail expression or return type position.
+//
+// ```
+// fn foo() { 4<|>2i32 }
+// ```
+// ->
+// ```
+// fn foo() -> i32 { 42i32 }
+// ```
+pub(crate) fn infer_function_return_type(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
+    let (tail_expr, builder_edit_pos, wrap_expr) = extract_tail(ctx)?;
+    let module = ctx.sema.scope(tail_expr.syntax()).module()?;
+    let ty = ctx.sema.type_of_expr(&tail_expr)?;
+    if ty.is_unit() {
+        return None;
+    }
+    let ty = ty.display_source_code(ctx.db(), module.into()).ok()?;
+    acc.add(
+        AssistId("infer_function_return_type", AssistKind::RefactorRewrite),
+        "Add this function's return type",
+        tail_expr.syntax().text_range(),
+        |builder| {
+            match builder_edit_pos {
+                InsertOrReplace::Insert(insert_pos) => {
+                    builder.insert(insert_pos, &format!("-> {} ", ty))
+                }
+                InsertOrReplace::Replace(text_range) => {
+                    builder.replace(text_range, &format!("-> {}", ty))
+                }
+            }
+            if wrap_expr {
+                mark::hit!(wrap_closure_non_block_expr);
+                // `|x| x` becomes `|x| -> T x` which is invalid, so wrap it in a block
+                builder.replace(tail_expr.syntax().text_range(), &format!("{{{}}}", tail_expr));
+            }
+        },
+    )
+}
+enum InsertOrReplace {
+    Insert(TextSize),
+    Replace(TextRange),
+}
+/// Check the potentially already specified return type and reject it or turn it into a builder command
+/// if allowed.
+fn ret_ty_to_action(ret_ty: Option<ast::RetType>, insert_pos: TextSize) -> Option<InsertOrReplace> {
+    match ret_ty {
+        Some(ret_ty) => match ret_ty.ty() {
+            Some(ast::Type::InferType(_)) | None => {
+                mark::hit!(existing_infer_ret_type);
+                mark::hit!(existing_infer_ret_type_closure);
+                Some(InsertOrReplace::Replace(ret_ty.syntax().text_range()))
+            }
+            _ => {
+                mark::hit!(existing_ret_type);
+                mark::hit!(existing_ret_type_closure);
+                None
+            }
+        },
+        None => Some(InsertOrReplace::Insert(insert_pos + TextSize::from(1))),
+    }
+}
+fn extract_tail(ctx: &AssistContext) -> Option<(ast::Expr, InsertOrReplace, bool)> {
+    let (tail_expr, return_type_range, action, wrap_expr) =
+        if let Some(closure) = ctx.find_node_at_offset::<ast::ClosureExpr>() {
+            let rpipe_pos = closure.param_list()?.syntax().last_token()?.text_range().end();
+            let action = ret_ty_to_action(closure.ret_type(), rpipe_pos)?;
+            let body = closure.body()?;
+            let body_start = body.syntax().first_token()?.text_range().start();
+            let (tail_expr, wrap_expr) = match body {
+                ast::Expr::BlockExpr(block) => (block.expr()?, false),
+                body => (body, true),
+            };
+            let ret_range = TextRange::new(rpipe_pos, body_start);
+            (tail_expr, ret_range, action, wrap_expr)
+        } else {
+            let func = ctx.find_node_at_offset::<ast::Fn>()?;
+            let rparen_pos = func.param_list()?.r_paren_token()?.text_range().end();
+            let action = ret_ty_to_action(func.ret_type(), rparen_pos)?;
+            let body = func.body()?;
+            let tail_expr = body.expr()?;
+            let ret_range_end = body.l_curly_token()?.text_range().start();
+            let ret_range = TextRange::new(rparen_pos, ret_range_end);
+            (tail_expr, ret_range, action, false)
+        };
+    let frange = ctx.frange.range;
+    if return_type_range.contains_range(frange) {
+        mark::hit!(cursor_in_ret_position);
+        mark::hit!(cursor_in_ret_position_closure);
+    } else if tail_expr.syntax().text_range().contains_range(frange) {
+        mark::hit!(cursor_on_tail);
+        mark::hit!(cursor_on_tail_closure);
+    } else {
+        return None;
+    }
+    Some((tail_expr, action, wrap_expr))
+}
+#[cfg(test)]
+mod tests {
+    use crate::tests::{check_assist, check_assist_not_applicable};
+    use super::*;
+    #[test]
+    fn infer_return_type_specified_inferred() {
+        mark::check!(existing_infer_ret_type);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() -> <|>_ {
+    45
+}"#,
+            r#"fn foo() -> i32 {
+    45
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_specified_inferred_closure() {
+        mark::check!(existing_infer_ret_type_closure);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    || -> _ {<|>45};
+}"#,
+            r#"fn foo() {
+    || -> i32 {45};
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_cursor_at_return_type_pos() {
+        mark::check!(cursor_in_ret_position);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() <|>{
+    45
+}"#,
+            r#"fn foo() -> i32 {
+    45
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_cursor_at_return_type_pos_closure() {
+        mark::check!(cursor_in_ret_position_closure);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    || <|>45
+}"#,
+            r#"fn foo() {
+    || -> i32 {45}
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type() {
+        mark::check!(cursor_on_tail);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    45<|>
+}"#,
+            r#"fn foo() -> i32 {
+    45
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_nested() {
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    if true {
+        3<|>
+    } else {
+        5
+    }
+}"#,
+            r#"fn foo() -> i32 {
+    if true {
+        3
+    } else {
+        5
+    }
+}"#,
+        );
+    }
+    #[test]
+    fn not_applicable_ret_type_specified() {
+        mark::check!(existing_ret_type);
+        check_assist_not_applicable(
+            infer_function_return_type,
+            r#"fn foo() -> i32 {
+    ( 45<|> + 32 ) * 123
+}"#,
+        );
+    }
+    #[test]
+    fn not_applicable_non_tail_expr() {
+        check_assist_not_applicable(
+            infer_function_return_type,
+            r#"fn foo() {
+    let x = <|>3;
+    ( 45 + 32 ) * 123
+}"#,
+        );
+    }
+    #[test]
+    fn not_applicable_unit_return_type() {
+        check_assist_not_applicable(
+            infer_function_return_type,
+            r#"fn foo() {
+    (<|>)
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_closure_block() {
+        mark::check!(cursor_on_tail_closure);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    |x: i32| {
+        x<|>
+    };
+}"#,
+            r#"fn foo() {
+    |x: i32| -> i32 {
+        x
+    };
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_closure() {
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    |x: i32| { x<|> };
+}"#,
+            r#"fn foo() {
+    |x: i32| -> i32 { x };
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_closure_wrap() {
+        mark::check!(wrap_closure_non_block_expr);
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    |x: i32| x<|>;
+}"#,
+            r#"fn foo() {
+    |x: i32| -> i32 {x};
+}"#,
+        );
+    }
+    #[test]
+    fn infer_return_type_nested_closure() {
+        check_assist(
+            infer_function_return_type,
+            r#"fn foo() {
+    || {
+        if true {
+            3<|>
+        } else {
+            5
+        }
+    }
+}"#,
+            r#"fn foo() {
+    || -> i32 {
+        if true {
+            3
+        } else {
+            5
+        }
+    }
+}"#,
+        );
+    }
+    #[test]
+    fn not_applicable_ret_type_specified_closure() {
+        mark::check!(existing_ret_type_closure);
+        check_assist_not_applicable(
+            infer_function_return_type,
+            r#"fn foo() {
+    || -> i32 { 3<|> }
+}"#,
+        );
+    }
+    #[test]
+    fn not_applicable_non_tail_expr_closure() {
+        check_assist_not_applicable(
+            infer_function_return_type,
+            r#"fn foo() {
+    || -> i32 {
+        let x = 3<|>;
+        6
+    }
+}"#,
+        );
+    }
+}
diff --git a/crates/assists/src/handlers/introduce_named_lifetime.rs b/crates/assists/src/handlers/introduce_named_lifetime.rs
index 5f623e5f7..4cc8dae65 100644
--- a/crates/assists/src/handlers/introduce_named_lifetime.rs
+++ b/crates/assists/src/handlers/introduce_named_lifetime.rs
@@ -36,7 +36,7 @@ static ASSIST_LABEL: &str = "Introduce named lifetime";
 // FIXME: should also add support for the case fun(f: &Foo) -> &<|>Foo
 pub(crate) fn introduce_named_lifetime(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
    let lifetime_token = ctx
-        .find_token_at_offset(SyntaxKind::LIFETIME)
+        .find_token_syntax_at_offset(SyntaxKind::LIFETIME)
        .filter(|lifetime| lifetime.text() == "'_")?;
    if let Some(fn_def) = lifetime_token.ancestors().find_map(ast::Fn::cast) {
        generate_fn_def_assist(acc, &fn_def, lifetime_token.text_range())
diff --git a/crates/assists/src/handlers/invert_if.rs b/crates/assists/src/handlers/invert_if.rs
index 461fcf862..ea722b91b 100644
--- a/crates/assists/src/handlers/invert_if.rs
+++ b/crates/assists/src/handlers/invert_if.rs
@@ -29,7 +29,7 @@ use crate::{
 // ```
 pub(crate) fn invert_if(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let if_keyword = ctx.find_token_at_offset(T![if])?;
+    let if_keyword = ctx.find_token_syntax_at_offset(T![if])?;
    let expr = ast::IfExpr::cast(if_keyword.parent())?;
    let if_range = if_keyword.text_range();
    let cursor_in_range = if_range.contains_range(ctx.frange.range);
diff --git a/crates/assists/src/handlers/raw_string.rs b/crates/assists/src/handlers/raw_string.rs
index 9ddd116e0..4c759cc25 100644
--- a/crates/assists/src/handlers/raw_string.rs
+++ b/crates/assists/src/handlers/raw_string.rs
@@ -1,11 +1,6 @@
 use std::borrow::Cow;
-use syntax::{
+use syntax::{ast, AstToken, TextRange, TextSize};
-    ast::{self, HasQuotes, HasStringValue},
-    AstToken,
-    SyntaxKind::{RAW_STRING, STRING},
-    TextRange, TextSize,
-};
 use test_utils::mark;
 use crate::{AssistContext, AssistId, AssistKind, Assists};
@@ -26,7 +21,10 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // }
 // ```
 pub(crate) fn make_raw_string(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let token = ctx.find_token_at_offset(STRING).and_then(ast::String::cast)?;
+    let token = ctx.find_token_at_offset::<ast::String>()?;
+    if token.is_raw() {
+        return None;
+    }
    let value = token.value()?;
    let target = token.syntax().text_range();
    acc.add(
@@ -65,7 +63,10 @@ pub(crate) fn make_raw_string(acc: &mut Assists, ctx: &AssistContext) -> Option<
 // }
 // ```
 pub(crate) fn make_usual_string(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let token = ctx.find_token_at_offset(RAW_STRING).and_then(ast::RawString::cast)?;
+    let token = ctx.find_token_at_offset::<ast::String>()?;
+    if !token.is_raw() {
+        return None;
+    }
    let value = token.value()?;
    let target = token.syntax().text_range();
    acc.add(
@@ -104,11 +105,15 @@ pub(crate) fn make_usual_string(acc: &mut Assists, ctx: &AssistContext) -> Optio
 // }
 // ```
 pub(crate) fn add_hash(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let token = ctx.find_token_at_offset(RAW_STRING)?;
+    let token = ctx.find_token_at_offset::<ast::String>()?;
-    let target = token.text_range();
+    if !token.is_raw() {
+        return None;
+    }
+    let text_range = token.syntax().text_range();
+    let target = text_range;
    acc.add(AssistId("add_hash", AssistKind::Refactor), "Add #", target, |edit| {
-        edit.insert(token.text_range().start() + TextSize::of('r'), "#");
+        edit.insert(text_range.start() + TextSize::of('r'), "#");
-        edit.insert(token.text_range().end(), "#");
+        edit.insert(text_range.end(), "#");
    })
 }
@@ -128,7 +133,10 @@ pub(crate) fn add_hash(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
 // }
 // ```
 pub(crate) fn remove_hash(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let token = ctx.find_token_at_offset(RAW_STRING).and_then(ast::RawString::cast)?;
+    let token = ctx.find_token_at_offset::<ast::String>()?;
+    if !token.is_raw() {
+        return None;
+    }
    let text = token.text().as_str();
    if !text.starts_with("r#") && text.ends_with('#') {
diff --git a/crates/assists/src/handlers/remove_mut.rs b/crates/assists/src/handlers/remove_mut.rs
index 44f41daa9..575b271f7 100644
--- a/crates/assists/src/handlers/remove_mut.rs
+++ b/crates/assists/src/handlers/remove_mut.rs
@@ -18,7 +18,7 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // }
 // ```
 pub(crate) fn remove_mut(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let mut_token = ctx.find_token_at_offset(T![mut])?;
+    let mut_token = ctx.find_token_syntax_at_offset(T![mut])?;
    let delete_from = mut_token.text_range().start();
    let delete_to = match mut_token.next_token() {
        Some(it) if it.kind() == SyntaxKind::WHITESPACE => it.text_range().end(),
diff --git a/crates/assists/src/handlers/replace_let_with_if_let.rs b/crates/assists/src/handlers/replace_let_with_if_let.rs
index a5bcbda24..69d3b08d3 100644
--- a/crates/assists/src/handlers/replace_let_with_if_let.rs
+++ b/crates/assists/src/handlers/replace_let_with_if_let.rs
@@ -37,7 +37,7 @@ use ide_db::ty_filter::TryEnum;
 // fn compute() -> Option<i32> { None }
 // ```
 pub(crate) fn replace_let_with_if_let(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let let_kw = ctx.find_token_at_offset(T![let])?;
+    let let_kw = ctx.find_token_syntax_at_offset(T![let])?;
    let let_stmt = let_kw.ancestors().find_map(ast::LetStmt::cast)?;
    let init = let_stmt.initializer()?;
    let original_pat = let_stmt.pat()?;
diff --git a/crates/assists/src/handlers/replace_string_with_char.rs b/crates/assists/src/handlers/replace_string_with_char.rs
index 4ca87a8ec..b4b898846 100644
--- a/crates/assists/src/handlers/replace_string_with_char.rs
+++ b/crates/assists/src/handlers/replace_string_with_char.rs
@@ -1,8 +1,4 @@
-use syntax::{
+use syntax::{ast, AstToken, SyntaxKind::STRING};
-    ast::{self, HasStringValue},
-    AstToken,
-    SyntaxKind::STRING,
-};
 use crate::{AssistContext, AssistId, AssistKind, Assists};
@@ -22,7 +18,7 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // }
 // ```
 pub(crate) fn replace_string_with_char(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let token = ctx.find_token_at_offset(STRING).and_then(ast::String::cast)?;
+    let token = ctx.find_token_syntax_at_offset(STRING).and_then(ast::String::cast)?;
    let value = token.value()?;
    let target = token.syntax().text_range();
diff --git a/crates/assists/src/handlers/split_import.rs b/crates/assists/src/handlers/split_import.rs
index 15e67eaa1..ef1f6b8a1 100644
--- a/crates/assists/src/handlers/split_import.rs
+++ b/crates/assists/src/handlers/split_import.rs
@@ -16,7 +16,7 @@ use crate::{AssistContext, AssistId, AssistKind, Assists};
 // use std::{collections::HashMap};
 // ```
 pub(crate) fn split_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
-    let colon_colon = ctx.find_token_at_offset(T![::])?;
+    let colon_colon = ctx.find_token_syntax_at_offset(T![::])?;
    let path = ast::Path::cast(colon_colon.parent())?.qualifier()?;
    let top_path = successors(Some(path.clone()), |it| it.parent_path()).last()?;
diff --git a/crates/assists/src/handlers/unwrap_block.rs b/crates/assists/src/handlers/unwrap_block.rs
index 3851aeb3e..36ef871b9 100644
--- a/crates/assists/src/handlers/unwrap_block.rs
+++ b/crates/assists/src/handlers/unwrap_block.rs
@@ -29,7 +29,7 @@ pub(crate) fn unwrap_block(acc: &mut Assists, ctx: &AssistContext) -> Option<()>
    let assist_id = AssistId("unwrap_block", AssistKind::RefactorRewrite);
    let assist_label = "Unwrap block";
-    let l_curly_token = ctx.find_token_at_offset(T!['{'])?;
+    let l_curly_token = ctx.find_token_syntax_at_offset(T!['{'])?;
    let mut block = ast::BlockExpr::cast(l_curly_token.parent())?;
    let mut parent = block.syntax().parent()?;
    if ast::MatchArm::can_cast(parent.kind()) {
diff --git a/crates/assists/src/lib.rs b/crates/assists/src/lib.rs
index b804e495d..af88b3437 100644
--- a/crates/assists/src/lib.rs
+++ b/crates/assists/src/lib.rs
@@ -143,6 +143,7 @@ mod handlers {
    mod generate_function;
    mod generate_impl;
    mod generate_new;
+    mod infer_function_return_type;
    mod inline_local_variable;
    mod introduce_named_lifetime;
    mod invert_if;
@@ -190,6 +191,7 @@ mod handlers {
            generate_function::generate_function,
            generate_impl::generate_impl,
            generate_new::generate_new,
+            infer_function_return_type::infer_function_return_type,
            inline_local_variable::inline_local_variable,
            introduce_named_lifetime::introduce_named_lifetime,
            invert_if::invert_if,
diff --git a/crates/assists/src/tests/generated.rs b/crates/assists/src/tests/generated.rs
index acbf5b652..168e1626a 100644
--- a/crates/assists/src/tests/generated.rs
+++ b/crates/assists/src/tests/generated.rs
@@ -506,6 +506,19 @@ impl<T: Clone> Ctx<T> {
 }
 #[test]
+fn doctest_infer_function_return_type() {
+    check_doc_test(
+        "infer_function_return_type",
+        r#####"
+fn foo() { 4<|>2i32 }
+"#####,
+        r#####"
+fn foo() -> i32 { 42i32 }
+"#####,
+    )
+}
+#[test]
 fn doctest_inline_local_variable() {
    check_doc_test(
        "inline_local_variable",
diff --git a/crates/hir_def/src/body/lower.rs b/crates/hir_def/src/body/lower.rs
index 1deaa90f2..cd7958746 100644
--- a/crates/hir_def/src/body/lower.rs
+++ b/crates/hir_def/src/body/lower.rs
@@ -953,18 +953,19 @@ impl From<ast::BinOp> for BinaryOp {
 impl From<ast::LiteralKind> for Literal {
    fn from(ast_lit_kind: ast::LiteralKind) -> Self {
        match ast_lit_kind {
-            LiteralKind::IntNumber { suffix } => {
+            LiteralKind::IntNumber(lit) => {
-                let known_name = suffix.and_then(|it| BuiltinInt::from_suffix(&it));
+                if let Some(float_suffix) = lit.suffix().and_then(BuiltinFloat::from_suffix) {
+                    return Literal::Float(Default::default(), Some(float_suffix));
-                Literal::Int(Default::default(), known_name)
+                }
+                let ty = lit.suffix().and_then(|it| BuiltinInt::from_suffix(&it));
+                Literal::Int(Default::default(), ty)
            }
-            LiteralKind::FloatNumber { suffix } => {
+            LiteralKind::FloatNumber(lit) => {
-                let known_name = suffix.and_then(|it| BuiltinFloat::from_suffix(&it));
+                let ty = lit.suffix().and_then(|it| BuiltinFloat::from_suffix(&it));
+                Literal::Float(Default::default(), ty)
-                Literal::Float(Default::default(), known_name)
            }
-            LiteralKind::ByteString => Literal::ByteString(Default::default()),
+            LiteralKind::ByteString(_) => Literal::ByteString(Default::default()),
-            LiteralKind::String => Literal::String(Default::default()),
+            LiteralKind::String(_) => Literal::String(Default::default()),
            LiteralKind::Byte => Literal::Int(Default::default(), Some(BuiltinInt::U8)),
            LiteralKind::Bool(val) => Literal::Bool(val),
            LiteralKind::Char => Literal::Char(Default::default()),
diff --git a/crates/hir_expand/src/builtin_macro.rs b/crates/hir_expand/src/builtin_macro.rs
index 86918b626..aebbfc4df 100644
--- a/crates/hir_expand/src/builtin_macro.rs
+++ b/crates/hir_expand/src/builtin_macro.rs
@@ -8,7 +8,7 @@ use base_db::FileId;
 use either::Either;
 use mbe::parse_to_token_tree;
 use parser::FragmentKind;
-use syntax::ast::{self, AstToken, HasStringValue};
+use syntax::ast::{self, AstToken};
 macro_rules! register_builtin {
    ( LAZY: $(($name:ident, $kind: ident) => $expand:ident),* , EAGER: $(($e_name:ident, $e_kind: ident) => $e_expand:ident),*  ) => {
diff --git a/crates/ide/src/extend_selection.rs b/crates/ide/src/extend_selection.rs
index 3ee0af8ad..0971f7701 100644
--- a/crates/ide/src/extend_selection.rs
+++ b/crates/ide/src/extend_selection.rs
@@ -35,7 +35,7 @@ fn try_extend_selection(
 ) -> Option<TextRange> {
    let range = frange.range;
-    let string_kinds = [COMMENT, STRING, RAW_STRING, BYTE_STRING, RAW_BYTE_STRING];
+    let string_kinds = [COMMENT, STRING, BYTE_STRING];
    let list_kinds = [
        RECORD_PAT_FIELD_LIST,
        MATCH_ARM_LIST,
diff --git a/crates/ide/src/syntax_highlighting.rs b/crates/ide/src/syntax_highlighting.rs
index efcc8ecfe..05bafe9c8 100644
--- a/crates/ide/src/syntax_highlighting.rs
+++ b/crates/ide/src/syntax_highlighting.rs
@@ -179,10 +179,12 @@ pub(crate) fn highlight(
            element.clone()
        };
-        if let Some(token) = element.as_token().cloned().and_then(ast::RawString::cast) {
+        if let Some(token) = element.as_token().cloned().and_then(ast::String::cast) {
-            let expanded = element_to_highlight.as_token().unwrap().clone();
+            if token.is_raw() {
-            if injection::highlight_injection(&mut stack, &sema, token, expanded).is_some() {
+                let expanded = element_to_highlight.as_token().unwrap().clone();
-                continue;
+                if injection::highlight_injection(&mut stack, &sema, token, expanded).is_some() {
+                    continue;
+                }
            }
        }
@@ -214,10 +216,6 @@ pub(crate) fn highlight(
                    }
                    stack.pop_and_inject(None);
                }
-            } else if let Some(string) =
-                element_to_highlight.as_token().cloned().and_then(ast::RawString::cast)
-            {
-                format_string_highlighter.highlight_format_string(&mut stack, &string, range);
            }
        }
    }
@@ -532,7 +530,7 @@ fn highlight_element(
                None => h.into(),
            }
        }
-        STRING | RAW_STRING | RAW_BYTE_STRING | BYTE_STRING => HighlightTag::StringLiteral.into(),
+        STRING | BYTE_STRING => HighlightTag::StringLiteral.into(),
        ATTR => HighlightTag::Attribute.into(),
        INT_NUMBER | FLOAT_NUMBER => HighlightTag::NumericLiteral.into(),
        BYTE => HighlightTag::ByteLiteral.into(),
diff --git a/crates/ide/src/syntax_highlighting/format.rs b/crates/ide/src/syntax_highlighting/format.rs
index 71bde24f0..42f27df5d 100644
--- a/crates/ide/src/syntax_highlighting/format.rs
+++ b/crates/ide/src/syntax_highlighting/format.rs
@@ -29,9 +29,7 @@ impl FormatStringHighlighter {
                        .children_with_tokens()
                        .filter(|t| t.kind() != SyntaxKind::WHITESPACE)
                        .nth(1)
-                        .filter(|e| {
+                        .filter(|e| ast::String::can_cast(e.kind()))
-                            ast::String::can_cast(e.kind()) || ast::RawString::can_cast(e.kind())
-                        })
                }
                _ => {}
            }
diff --git a/crates/ide/src/syntax_highlighting/injection.rs b/crates/ide/src/syntax_highlighting/injection.rs
index 59a74bc02..e97d1be1a 100644
--- a/crates/ide/src/syntax_highlighting/injection.rs
+++ b/crates/ide/src/syntax_highlighting/injection.rs
@@ -2,7 +2,6 @@
 use std::{collections::BTreeMap, convert::TryFrom};
-use ast::{HasQuotes, HasStringValue};
 use hir::Semantics;
 use ide_db::call_info::ActiveParameter;
 use itertools::Itertools;
@@ -15,7 +14,7 @@ use super::HighlightedRangeStack;
 pub(super) fn highlight_injection(
    acc: &mut HighlightedRangeStack,
    sema: &Semantics<RootDatabase>,
-    literal: ast::RawString,
+    literal: ast::String,
    expanded: SyntaxToken,
 ) -> Option<()> {
    let active_parameter = ActiveParameter::at_token(&sema, expanded)?;
diff --git a/crates/ide/src/syntax_tree.rs b/crates/ide/src/syntax_tree.rs
index 7941610d6..6dd05c05d 100644
--- a/crates/ide/src/syntax_tree.rs
+++ b/crates/ide/src/syntax_tree.rs
@@ -1,9 +1,7 @@
 use ide_db::base_db::{FileId, SourceDatabase};
 use ide_db::RootDatabase;
 use syntax::{
-    algo, AstNode, NodeOrToken, SourceFile,
+    algo, AstNode, NodeOrToken, SourceFile, SyntaxKind::STRING, SyntaxToken, TextRange, TextSize,
-    SyntaxKind::{RAW_STRING, STRING},
-    SyntaxToken, TextRange, TextSize,
 };
 // Feature: Show Syntax Tree
@@ -46,7 +44,7 @@ fn syntax_tree_for_string(token: &SyntaxToken, text_range: TextRange) -> Option<
    // we'll attempt parsing it as rust syntax
    // to provide the syntax tree of the contents of the string
    match token.kind() {
-        STRING | RAW_STRING => syntax_tree_for_token(token, text_range),
+        STRING => syntax_tree_for_token(token, text_range),
        _ => None,
    }
 }
diff --git a/crates/parser/src/grammar.rs b/crates/parser/src/grammar.rs
index 4ab206a83..116b991a8 100644
--- a/crates/parser/src/grammar.rs
+++ b/crates/parser/src/grammar.rs
@@ -236,10 +236,7 @@ fn abi(p: &mut Parser) {
    assert!(p.at(T![extern]));
    let abi = p.start();
    p.bump(T![extern]);
-    match p.current() {
+    p.eat(STRING);
-        STRING | RAW_STRING => p.bump_any(),
-        _ => (),
-    }
    abi.complete(p, ABI);
 }
diff --git a/crates/parser/src/grammar/expressions/atom.rs b/crates/parser/src/grammar/expressions/atom.rs
index 66a92a4e1..31f42f161 100644
--- a/crates/parser/src/grammar/expressions/atom.rs
+++ b/crates/parser/src/grammar/expressions/atom.rs
@@ -15,18 +15,8 @@ use super::*;
 //     let _ = b"e";
 //     let _ = br"f";
 // }
-pub(crate) const LITERAL_FIRST: TokenSet = TokenSet::new(&[
+pub(crate) const LITERAL_FIRST: TokenSet =
-    TRUE_KW,
+    TokenSet::new(&[TRUE_KW, FALSE_KW, INT_NUMBER, FLOAT_NUMBER, BYTE, CHAR, STRING, BYTE_STRING]);
-    FALSE_KW,
-    INT_NUMBER,
-    FLOAT_NUMBER,
-    BYTE,
-    CHAR,
-    STRING,
-    RAW_STRING,
-    BYTE_STRING,
-    RAW_BYTE_STRING,
-]);
 pub(crate) fn literal(p: &mut Parser) -> Option<CompletedMarker> {
    if !p.at_ts(LITERAL_FIRST) {
diff --git a/crates/parser/src/grammar/items.rs b/crates/parser/src/grammar/items.rs
index 22810e6fb..780bc470a 100644
--- a/crates/parser/src/grammar/items.rs
+++ b/crates/parser/src/grammar/items.rs
@@ -239,9 +239,7 @@ fn items_without_modifiers(p: &mut Parser, m: Marker) -> Result<(), Marker> {
        T![static] => consts::static_(p, m),
        // test extern_block
        // extern {}
-        T![extern]
+        T![extern] if la == T!['{'] || (la == STRING && p.nth(2) == T!['{']) => {
-            if la == T!['{'] || ((la == STRING || la == RAW_STRING) && p.nth(2) == T!['{']) =>
-        {
            abi(p);
            extern_item_list(p);
            m.complete(p, EXTERN_BLOCK);
diff --git a/crates/parser/src/syntax_kind/generated.rs b/crates/parser/src/syntax_kind/generated.rs
index 935bd2c5e..8bc6688f3 100644
--- a/crates/parser/src/syntax_kind/generated.rs
+++ b/crates/parser/src/syntax_kind/generated.rs
@@ -111,9 +111,7 @@ pub enum SyntaxKind {
    CHAR,
    BYTE,
    STRING,
-    RAW_STRING,
    BYTE_STRING,
-    RAW_BYTE_STRING,
    ERROR,
    IDENT,
    WHITESPACE,
@@ -277,8 +275,7 @@ impl SyntaxKind {
    }
    pub fn is_literal(self) -> bool {
        match self {
-            INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE | STRING | RAW_STRING | BYTE_STRING
+            INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE | STRING | BYTE_STRING => true,
-            | RAW_BYTE_STRING => true,
            _ => false,
        }
    }
diff --git a/crates/project_model/src/sysroot.rs b/crates/project_model/src/sysroot.rs
index 3fe494729..b0e8863f6 100644
--- a/crates/project_model/src/sysroot.rs
+++ b/crates/project_model/src/sysroot.rs
@@ -114,8 +114,12 @@ fn discover_sysroot_src_dir(current_dir: &AbsPath) -> Result<AbsPathBuf> {
    if let Ok(path) = env::var("RUST_SRC_PATH") {
        let path = AbsPathBuf::try_from(path.as_str())
            .map_err(|path| format_err!("RUST_SRC_PATH must be absolute: {}", path.display()))?;
-        log::debug!("Discovered sysroot by RUST_SRC_PATH: {}", path.display());
+        let core = path.join("core");
-        return Ok(path);
+        if core.exists() {
+            log::debug!("Discovered sysroot by RUST_SRC_PATH: {}", path.display());
+            return Ok(path);
+        }
+        log::debug!("RUST_SRC_PATH is set, but is invalid (no core: {:?}), ignoring", core);
    }
    let sysroot_path = {
diff --git a/crates/syntax/src/ast.rs b/crates/syntax/src/ast.rs
index a16ac6a7c..8a0e3d27b 100644
--- a/crates/syntax/src/ast.rs
+++ b/crates/syntax/src/ast.rs
@@ -16,7 +16,7 @@ use crate::{
 };
 pub use self::{
-    expr_ext::{ArrayExprKind, BinOp, Effect, ElseBranch, LiteralKind, PrefixOp, Radix, RangeOp},
+    expr_ext::{ArrayExprKind, BinOp, Effect, ElseBranch, LiteralKind, PrefixOp, RangeOp},
    generated::{nodes::*, tokens::*},
    node_ext::{
        AttrKind, FieldKind, NameOrNameRef, PathSegmentKind, SelfParamKind, SlicePatComponents,
diff --git a/crates/syntax/src/ast/expr_ext.rs b/crates/syntax/src/ast/expr_ext.rs
index 3aff01e83..9253c97d0 100644
--- a/crates/syntax/src/ast/expr_ext.rs
+++ b/crates/syntax/src/ast/expr_ext.rs
@@ -2,7 +2,7 @@
 use crate::{
    ast::{self, support, AstChildren, AstNode},
-    SmolStr,
+    AstToken,
    SyntaxKind::*,
    SyntaxToken, T,
 };
@@ -298,12 +298,12 @@ impl ast::ArrayExpr {
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub enum LiteralKind {
-    String,
+    String(ast::String),
-    ByteString,
+    ByteString(ast::ByteString),
+    IntNumber(ast::IntNumber),
+    FloatNumber(ast::FloatNumber),
    Char,
    Byte,
-    IntNumber { suffix: Option<SmolStr> },
-    FloatNumber { suffix: Option<SmolStr> },
    Bool(bool),
 }
@@ -315,114 +315,30 @@ impl ast::Literal {
            .and_then(|e| e.into_token())
            .unwrap()
    }
-    fn find_suffix(text: &str, possible_suffixes: &[&str]) -> Option<SmolStr> {
-        possible_suffixes
-            .iter()
-            .find(|&suffix| text.ends_with(suffix))
-            .map(|&suffix| SmolStr::new(suffix))
-    }
    pub fn kind(&self) -> LiteralKind {
-        const INT_SUFFIXES: [&str; 12] = [
-            "u64", "u32", "u16", "u8", "usize", "isize", "i64", "i32", "i16", "i8", "u128", "i128",
-        ];
-        const FLOAT_SUFFIXES: [&str; 2] = ["f32", "f64"];
        let token = self.token();
+        if let Some(t) = ast::IntNumber::cast(token.clone()) {
+            return LiteralKind::IntNumber(t);
+        }
+        if let Some(t) = ast::FloatNumber::cast(token.clone()) {
+            return LiteralKind::FloatNumber(t);
+        }
+        if let Some(t) = ast::String::cast(token.clone()) {
+            return LiteralKind::String(t);
+        }
+        if let Some(t) = ast::ByteString::cast(token.clone()) {
+            return LiteralKind::ByteString(t);
+        }
        match token.kind() {
-            INT_NUMBER => {
-                // FYI: there was a bug here previously, thus the if statement below is necessary.
-                // The lexer treats e.g. `1f64` as an integer literal. See
-                // https://github.com/rust-analyzer/rust-analyzer/issues/1592
-                // and the comments on the linked PR.
-                let text = token.text();
-                if let suffix @ Some(_) = Self::find_suffix(&text, &FLOAT_SUFFIXES) {
-                    LiteralKind::FloatNumber { suffix }
-                } else {
-                    LiteralKind::IntNumber { suffix: Self::find_suffix(&text, &INT_SUFFIXES) }
-                }
-            }
-            FLOAT_NUMBER => {
-                let text = token.text();
-                LiteralKind::FloatNumber { suffix: Self::find_suffix(&text, &FLOAT_SUFFIXES) }
-            }
-            STRING | RAW_STRING => LiteralKind::String,
            T![true] => LiteralKind::Bool(true),
            T![false] => LiteralKind::Bool(false),
-            BYTE_STRING | RAW_BYTE_STRING => LiteralKind::ByteString,
            CHAR => LiteralKind::Char,
            BYTE => LiteralKind::Byte,
            _ => unreachable!(),
        }
    }
-    // FIXME: should probably introduce string token type?
-    // https://github.com/rust-analyzer/rust-analyzer/issues/6308
-    pub fn int_value(&self) -> Option<(Radix, u128)> {
-        let suffix = match self.kind() {
-            LiteralKind::IntNumber { suffix } => suffix,
-            _ => return None,
-        };
-        let token = self.token();
-        let mut text = token.text().as_str();
-        text = &text[..text.len() - suffix.map_or(0, |it| it.len())];
-        let buf;
-        if text.contains("_") {
-            buf = text.replace('_', "");
-            text = buf.as_str();
-        };
-        let radix = Radix::identify(text)?;
-        let digits = &text[radix.prefix_len()..];
-        let value = u128::from_str_radix(digits, radix as u32).ok()?;
-        Some((radix, value))
-    }
-}
-#[derive(Debug, PartialEq, Eq, Copy, Clone)]
-pub enum Radix {
-    Binary = 2,
-    Octal = 8,
-    Decimal = 10,
-    Hexadecimal = 16,
-}
-impl Radix {
-    pub const ALL: &'static [Radix] =
-        &[Radix::Binary, Radix::Octal, Radix::Decimal, Radix::Hexadecimal];
-    fn identify(literal_text: &str) -> Option<Self> {
-        // We cannot express a literal in anything other than decimal in under 3 characters, so we return here if possible.
-        if literal_text.len() < 3 && literal_text.chars().all(|c| c.is_digit(10)) {
-            return Some(Self::Decimal);
-        }
-        let res = match &literal_text[..2] {
-            "0b" => Radix::Binary,
-            "0o" => Radix::Octal,
-            "0x" => Radix::Hexadecimal,
-            _ => Radix::Decimal,
-        };
-        // Checks that all characters after the base prefix are all valid digits for that base.
-        if literal_text[res.prefix_len()..].chars().all(|c| c.is_digit(res as u32)) {
-            Some(res)
-        } else {
-            None
-        }
-    }
-    const fn prefix_len(&self) -> usize {
-        match self {
-            Self::Decimal => 0,
-            _ => 2,
-        }
-    }
 }
 #[derive(Debug, Clone, PartialEq, Eq)]
diff --git a/crates/syntax/src/ast/generated/tokens.rs b/crates/syntax/src/ast/generated/tokens.rs
index abadd0b61..728b72cd7 100644
--- a/crates/syntax/src/ast/generated/tokens.rs
+++ b/crates/syntax/src/ast/generated/tokens.rs
@@ -70,16 +70,58 @@ impl AstToken for String {
 }
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub struct RawString {
+pub struct ByteString {
    pub(crate) syntax: SyntaxToken,
 }
-impl std::fmt::Display for RawString {
+impl std::fmt::Display for ByteString {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        std::fmt::Display::fmt(&self.syntax, f)
    }
 }
-impl AstToken for RawString {
+impl AstToken for ByteString {
-    fn can_cast(kind: SyntaxKind) -> bool { kind == RAW_STRING }
+    fn can_cast(kind: SyntaxKind) -> bool { kind == BYTE_STRING }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct IntNumber {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for IntNumber {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for IntNumber {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == INT_NUMBER }
+    fn cast(syntax: SyntaxToken) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxToken { &self.syntax }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct FloatNumber {
+    pub(crate) syntax: SyntaxToken,
+}
+impl std::fmt::Display for FloatNumber {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.syntax, f)
+    }
+}
+impl AstToken for FloatNumber {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == FLOAT_NUMBER }
    fn cast(syntax: SyntaxToken) -> Option<Self> {
        if Self::can_cast(syntax.kind()) {
            Some(Self { syntax })
diff --git a/crates/syntax/src/ast/node_ext.rs b/crates/syntax/src/ast/node_ext.rs
index c5cd1c504..ce35ac01a 100644
--- a/crates/syntax/src/ast/node_ext.rs
+++ b/crates/syntax/src/ast/node_ext.rs
@@ -7,7 +7,7 @@ use itertools::Itertools;
 use parser::SyntaxKind;
 use crate::{
-    ast::{self, support, token_ext::HasStringValue, AstNode, AstToken, NameOwner, SyntaxNode},
+    ast::{self, support, AstNode, AstToken, NameOwner, SyntaxNode},
    SmolStr, SyntaxElement, SyntaxToken, T,
 };
@@ -55,13 +55,7 @@ impl ast::Attr {
        let key = self.simple_name()?;
        let value_token = lit.syntax().first_token()?;
-        let value: SmolStr = if let Some(s) = ast::String::cast(value_token.clone()) {
+        let value: SmolStr = ast::String::cast(value_token.clone())?.value()?.into();
-            s.value()?.into()
-        } else if let Some(s) = ast::RawString::cast(value_token) {
-            s.value()?.into()
-        } else {
-            return None;
-        };
        Some((key, value))
    }
diff --git a/crates/syntax/src/ast/token_ext.rs b/crates/syntax/src/ast/token_ext.rs
index c5ef92733..e4e512f2e 100644
--- a/crates/syntax/src/ast/token_ext.rs
+++ b/crates/syntax/src/ast/token_ext.rs
@@ -8,11 +8,11 @@ use std::{
 use rustc_lexer::unescape::{unescape_literal, Mode};
 use crate::{
-    ast::{AstToken, Comment, RawString, String, Whitespace},
+    ast::{self, AstToken},
    TextRange, TextSize,
 };
-impl Comment {
+impl ast::Comment {
    pub fn kind(&self) -> CommentKind {
        kind_by_prefix(self.text())
    }
@@ -80,7 +80,7 @@ fn kind_by_prefix(text: &str) -> CommentKind {
    panic!("bad comment text: {:?}", text)
 }
-impl Whitespace {
+impl ast::Whitespace {
    pub fn spans_multiple_lines(&self) -> bool {
        let text = self.text();
        text.find('\n').map_or(false, |idx| text[idx + 1..].contains('\n'))
@@ -114,43 +114,28 @@ impl QuoteOffsets {
    }
 }
-pub trait HasQuotes: AstToken {
+impl ast::String {
-    fn quote_offsets(&self) -> Option<QuoteOffsets> {
+    pub fn is_raw(&self) -> bool {
-        let text = self.text().as_str();
+        self.text().starts_with('r')
-        let offsets = QuoteOffsets::new(text)?;
-        let o = self.syntax().text_range().start();
-        let offsets = QuoteOffsets {
-            quotes: (offsets.quotes.0 + o, offsets.quotes.1 + o),
-            contents: offsets.contents + o,
-        };
-        Some(offsets)
-    }
-    fn open_quote_text_range(&self) -> Option<TextRange> {
-        self.quote_offsets().map(|it| it.quotes.0)
    }
+    pub fn map_range_up(&self, range: TextRange) -> Option<TextRange> {
-    fn close_quote_text_range(&self) -> Option<TextRange> {
+        let contents_range = self.text_range_between_quotes()?;
-        self.quote_offsets().map(|it| it.quotes.1)
+        assert!(TextRange::up_to(contents_range.len()).contains_range(range));
+        Some(range + contents_range.start())
    }
-    fn text_range_between_quotes(&self) -> Option<TextRange> {
+    pub fn value(&self) -> Option<Cow<'_, str>> {
-        self.quote_offsets().map(|it| it.contents)
+        if self.is_raw() {
-    }
+            let text = self.text().as_str();
-}
+            let text =
+                &text[self.text_range_between_quotes()? - self.syntax().text_range().start()];
-impl HasQuotes for String {}
+            return Some(Cow::Borrowed(text));
-impl HasQuotes for RawString {}
+        }
-pub trait HasStringValue: HasQuotes {
-    fn value(&self) -> Option<Cow<'_, str>>;
-}
-impl HasStringValue for String {
-    fn value(&self) -> Option<Cow<'_, str>> {
        let text = self.text().as_str();
        let text = &text[self.text_range_between_quotes()? - self.syntax().text_range().start()];
-        let mut buf = std::string::String::with_capacity(text.len());
+        let mut buf = String::with_capacity(text.len());
        let mut has_error = false;
        unescape_literal(text, Mode::Str, &mut |_, unescaped_char| match unescaped_char {
            Ok(c) => buf.push(c),
@@ -164,21 +149,31 @@ impl HasStringValue for String {
        let res = if buf == text { Cow::Borrowed(text) } else { Cow::Owned(buf) };
        Some(res)
    }
-}
-impl HasStringValue for RawString {
+    pub fn quote_offsets(&self) -> Option<QuoteOffsets> {
-    fn value(&self) -> Option<Cow<'_, str>> {
        let text = self.text().as_str();
-        let text = &text[self.text_range_between_quotes()? - self.syntax().text_range().start()];
+        let offsets = QuoteOffsets::new(text)?;
-        Some(Cow::Borrowed(text))
+        let o = self.syntax().text_range().start();
+        let offsets = QuoteOffsets {
+            quotes: (offsets.quotes.0 + o, offsets.quotes.1 + o),
+            contents: offsets.contents + o,
+        };
+        Some(offsets)
+    }
+    pub fn text_range_between_quotes(&self) -> Option<TextRange> {
+        self.quote_offsets().map(|it| it.contents)
+    }
+    pub fn open_quote_text_range(&self) -> Option<TextRange> {
+        self.quote_offsets().map(|it| it.quotes.0)
+    }
+    pub fn close_quote_text_range(&self) -> Option<TextRange> {
+        self.quote_offsets().map(|it| it.quotes.1)
    }
 }
-impl RawString {
+impl ast::ByteString {
-    pub fn map_range_up(&self, range: TextRange) -> Option<TextRange> {
+    pub fn is_raw(&self) -> bool {
-        let contents_range = self.text_range_between_quotes()?;
+        self.text().starts_with("br")
-        assert!(TextRange::up_to(contents_range.len()).contains_range(range));
-        Some(range + contents_range.start())
    }
 }
@@ -500,7 +495,7 @@ pub trait HasFormatSpecifier: AstToken {
    }
 }
-impl HasFormatSpecifier for String {
+impl HasFormatSpecifier for ast::String {
    fn char_ranges(
        &self,
    ) -> Option<Vec<(TextRange, Result<char, rustc_lexer::unescape::EscapeError>)>> {
@@ -521,18 +516,86 @@ impl HasFormatSpecifier for String {
    }
 }
-impl HasFormatSpecifier for RawString {
+impl ast::IntNumber {
-    fn char_ranges(
+    const SUFFIXES: &'static [&'static str] = &[
-        &self,
+        "u8", "u16", "u32", "u64", "u128", "usize", // Unsigned.
-    ) -> Option<Vec<(TextRange, Result<char, rustc_lexer::unescape::EscapeError>)>> {
+        "i8", "i16", "i32", "i64", "i128", "isize", // Signed.
-        let text = self.text().as_str();
+    ];
-        let text = &text[self.text_range_between_quotes()? - self.syntax().text_range().start()];
-        let offset = self.text_range_between_quotes()?.start() - self.syntax().text_range().start();
+    pub fn radix(&self) -> Radix {
+        match self.text().get(..2).unwrap_or_default() {
+            "0b" => Radix::Binary,
+            "0o" => Radix::Octal,
+            "0x" => Radix::Hexadecimal,
+            _ => Radix::Decimal,
+        }
+    }
-        let mut res = Vec::with_capacity(text.len());
+    pub fn value(&self) -> Option<u128> {
-        for (idx, c) in text.char_indices() {
+        let token = self.syntax();
-            res.push((TextRange::at(idx.try_into().unwrap(), TextSize::of(c)) + offset, Ok(c)));
+        let mut text = token.text().as_str();
+        if let Some(suffix) = self.suffix() {
+            text = &text[..text.len() - suffix.len()]
+        }
+        let radix = self.radix();
+        text = &text[radix.prefix_len()..];
+        let buf;
+        if text.contains("_") {
+            buf = text.replace('_', "");
+            text = buf.as_str();
+        };
+        let value = u128::from_str_radix(text, radix as u32).ok()?;
+        Some(value)
+    }
+    pub fn suffix(&self) -> Option<&str> {
+        let text = self.text();
+        // FIXME: don't check a fixed set of suffixes, `1_0_1_l_o_l` is valid
+        // syntax, suffix is `l_o_l`.
+        ast::IntNumber::SUFFIXES.iter().chain(ast::FloatNumber::SUFFIXES.iter()).find_map(
+            |suffix| {
+                if text.ends_with(suffix) {
+                    return Some(&text[text.len() - suffix.len()..]);
+                }
+                None
+            },
+        )
+    }
+}
+impl ast::FloatNumber {
+    const SUFFIXES: &'static [&'static str] = &["f32", "f64"];
+    pub fn suffix(&self) -> Option<&str> {
+        let text = self.text();
+        ast::FloatNumber::SUFFIXES.iter().find_map(|suffix| {
+            if text.ends_with(suffix) {
+                return Some(&text[text.len() - suffix.len()..]);
+            }
+            None
+        })
+    }
+}
+#[derive(Debug, PartialEq, Eq, Copy, Clone)]
+pub enum Radix {
+    Binary = 2,
+    Octal = 8,
+    Decimal = 10,
+    Hexadecimal = 16,
+}
+impl Radix {
+    pub const ALL: &'static [Radix] =
+        &[Radix::Binary, Radix::Octal, Radix::Decimal, Radix::Hexadecimal];
+    const fn prefix_len(&self) -> usize {
+        match self {
+            Self::Decimal => 0,
+            _ => 2,
        }
-        Some(res)
    }
 }
diff --git a/crates/syntax/src/parsing/lexer.rs b/crates/syntax/src/parsing/lexer.rs
index 7e38c32cc..8afd7e53b 100644
--- a/crates/syntax/src/parsing/lexer.rs
+++ b/crates/syntax/src/parsing/lexer.rs
@@ -3,7 +3,7 @@
 use std::convert::TryInto;
-use rustc_lexer::{LiteralKind as LK, RawStrError};
+use rustc_lexer::RawStrError;
 use crate::{
    SyntaxError,
@@ -185,63 +185,77 @@ fn rustc_token_kind_to_syntax_kind(
    return (syntax_kind, None);
    fn match_literal_kind(kind: &rustc_lexer::LiteralKind) -> (SyntaxKind, Option<&'static str>) {
-        #[rustfmt::skip]
+        let mut err = "";
        let syntax_kind = match *kind {
-            LK::Int { empty_int: false, .. } => INT_NUMBER,
+            rustc_lexer::LiteralKind::Int { empty_int, base: _ } => {
-            LK::Int { empty_int: true, .. } => {
+                if empty_int {
-                return (INT_NUMBER, Some("Missing digits after the integer base prefix"))
+                    err = "Missing digits after the integer base prefix";
+                }
+                INT_NUMBER
            }
+            rustc_lexer::LiteralKind::Float { empty_exponent, base: _ } => {
-            LK::Float { empty_exponent: false, .. } => FLOAT_NUMBER,
+                if empty_exponent {
-            LK::Float { empty_exponent: true, .. } => {
+                    err = "Missing digits after the exponent symbol";
-                return (FLOAT_NUMBER, Some("Missing digits after the exponent symbol"))
+                }
+                FLOAT_NUMBER
            }
+            rustc_lexer::LiteralKind::Char { terminated } => {
-            LK::Char { terminated: true } => CHAR,
+                if !terminated {
-            LK::Char { terminated: false } => {
+                    err = "Missing trailing `'` symbol to terminate the character literal";
-                return (CHAR, Some("Missing trailing `'` symbol to terminate the character literal"))
+                }
+                CHAR
            }
+            rustc_lexer::LiteralKind::Byte { terminated } => {
-            LK::Byte { terminated: true } => BYTE,
+                if !terminated {
-            LK::Byte { terminated: false } => {
+                    err = "Missing trailing `'` symbol to terminate the byte literal";
-                return (BYTE, Some("Missing trailing `'` symbol to terminate the byte literal"))
+                }
+                BYTE
            }
+            rustc_lexer::LiteralKind::Str { terminated } => {
-            LK::Str { terminated: true } => STRING,
+                if !terminated {
-            LK::Str { terminated: false } => {
+                    err = "Missing trailing `\"` symbol to terminate the string literal";
-                return (STRING, Some("Missing trailing `\"` symbol to terminate the string literal"))
+                }
+                STRING
            }
+            rustc_lexer::LiteralKind::ByteStr { terminated } => {
+                if !terminated {
-            LK::ByteStr { terminated: true } => BYTE_STRING,
+                    err = "Missing trailing `\"` symbol to terminate the byte string literal";
-            LK::ByteStr { terminated: false } => {
+                }
-                return (BYTE_STRING, Some("Missing trailing `\"` symbol to terminate the byte string literal"))
+                BYTE_STRING
+            }
+            rustc_lexer::LiteralKind::RawStr { err: raw_str_err, .. } => {
+                if let Some(raw_str_err) = raw_str_err {
+                    err = match raw_str_err {
+                        RawStrError::InvalidStarter { .. } => "Missing `\"` symbol after `#` symbols to begin the raw string literal",
+                        RawStrError::NoTerminator { expected, found, .. } => if expected == found {
+                            "Missing trailing `\"` to terminate the raw string literal"
+                        } else {
+                            "Missing trailing `\"` with `#` symbols to terminate the raw string literal"
+                        },
+                        RawStrError::TooManyDelimiters { .. } => "Too many `#` symbols: raw strings may be delimited by up to 65535 `#` symbols",
+                    };
+                };
+                STRING
+            }
+            rustc_lexer::LiteralKind::RawByteStr { err: raw_str_err, .. } => {
+                if let Some(raw_str_err) = raw_str_err {
+                    err = match raw_str_err {
+                        RawStrError::InvalidStarter { .. } => "Missing `\"` symbol after `#` symbols to begin the raw byte string literal",
+                        RawStrError::NoTerminator { expected, found, .. } => if expected == found {
+                            "Missing trailing `\"` to terminate the raw byte string literal"
+                        } else {
+                            "Missing trailing `\"` with `#` symbols to terminate the raw byte string literal"
+                        },
+                        RawStrError::TooManyDelimiters { .. } => "Too many `#` symbols: raw byte strings may be delimited by up to 65535 `#` symbols",
+                    };
+                };
+                BYTE_STRING
            }
-            LK::RawStr { err, .. } => match err {
-                None => RAW_STRING,
-                Some(RawStrError::InvalidStarter { .. }) => return (RAW_STRING, Some("Missing `\"` symbol after `#` symbols to begin the raw string literal")),
-                Some(RawStrError::NoTerminator { expected, found, .. }) => if expected == found {
-                    return (RAW_STRING, Some("Missing trailing `\"` to terminate the raw string literal"))
-                } else {
-                    return (RAW_STRING, Some("Missing trailing `\"` with `#` symbols to terminate the raw string literal"))
-                },
-                Some(RawStrError::TooManyDelimiters { .. }) => return (RAW_STRING, Some("Too many `#` symbols: raw strings may be delimited by up to 65535 `#` symbols")),
-            },
-            LK::RawByteStr { err, .. } => match err {
-                None => RAW_BYTE_STRING,
-                Some(RawStrError::InvalidStarter { .. }) => return (RAW_BYTE_STRING, Some("Missing `\"` symbol after `#` symbols to begin the raw byte string literal")),
-                Some(RawStrError::NoTerminator { expected, found, .. }) => if expected == found {
-                    return (RAW_BYTE_STRING, Some("Missing trailing `\"` to terminate the raw byte string literal"))
-                } else {
-                    return (RAW_BYTE_STRING, Some("Missing trailing `\"` with `#` symbols to terminate the raw byte string literal"))
-                },
-                Some(RawStrError::TooManyDelimiters { .. }) => return (RAW_BYTE_STRING, Some("Too many `#` symbols: raw byte strings may be delimited by up to 65535 `#` symbols")),
-            },
        };
-        (syntax_kind, None)
+        let err = if err.is_empty() { None } else { Some(err) };
+        (syntax_kind, err)
    }
 }
diff --git a/crates/syntax/src/parsing/reparsing.rs b/crates/syntax/src/parsing/reparsing.rs
index 4149f856a..190f5f67a 100644
--- a/crates/syntax/src/parsing/reparsing.rs
+++ b/crates/syntax/src/parsing/reparsing.rs
@@ -44,7 +44,7 @@ fn reparse_token<'node>(
    let prev_token = algo::find_covering_element(root, edit.delete).as_token()?.clone();
    let prev_token_kind = prev_token.kind();
    match prev_token_kind {
-        WHITESPACE | COMMENT | IDENT | STRING | RAW_STRING => {
+        WHITESPACE | COMMENT | IDENT | STRING => {
            if prev_token_kind == WHITESPACE || prev_token_kind == COMMENT {
                // removing a new line may extends previous token
                let deleted_range = edit.delete - prev_token.text_range().start();
diff --git a/crates/syntax/src/validation.rs b/crates/syntax/src/validation.rs
index 0f9a5e8ae..6f45149bf 100644
--- a/crates/syntax/src/validation.rs
+++ b/crates/syntax/src/validation.rs
@@ -4,7 +4,7 @@ mod block;
 use crate::{
    algo, ast, match_ast, AstNode, SyntaxError,
-    SyntaxKind::{BYTE, BYTE_STRING, CHAR, CONST, FN, INT_NUMBER, STRING, TYPE_ALIAS},
+    SyntaxKind::{CONST, FN, INT_NUMBER, TYPE_ALIAS},
    SyntaxNode, SyntaxToken, TextSize, T,
 };
 use rowan::Direction;
@@ -121,36 +121,42 @@ fn validate_literal(literal: ast::Literal, acc: &mut Vec<SyntaxError>) {
        acc.push(SyntaxError::new_at_offset(rustc_unescape_error_to_string(err), off));
    };
-    match token.kind() {
+    match literal.kind() {
-        BYTE => {
+        ast::LiteralKind::String(s) => {
-            if let Some(Err(e)) = unquote(text, 2, '\'').map(unescape_byte) {
+            if !s.is_raw() {
-                push_err(2, e);
+                if let Some(without_quotes) = unquote(text, 1, '"') {
+                    unescape_literal(without_quotes, Mode::Str, &mut |range, char| {
+                        if let Err(err) = char {
+                            push_err(1, (range.start, err));
+                        }
+                    })
+                }
            }
        }
-        CHAR => {
+        ast::LiteralKind::ByteString(s) => {
-            if let Some(Err(e)) = unquote(text, 1, '\'').map(unescape_char) {
+            if !s.is_raw() {
-                push_err(1, e);
+                if let Some(without_quotes) = unquote(text, 2, '"') {
+                    unescape_byte_literal(without_quotes, Mode::ByteStr, &mut |range, char| {
+                        if let Err(err) = char {
+                            push_err(2, (range.start, err));
+                        }
+                    })
+                }
            }
        }
-        BYTE_STRING => {
+        ast::LiteralKind::Char => {
-            if let Some(without_quotes) = unquote(text, 2, '"') {
+            if let Some(Err(e)) = unquote(text, 1, '\'').map(unescape_char) {
-                unescape_byte_literal(without_quotes, Mode::ByteStr, &mut |range, char| {
+                push_err(1, e);
-                    if let Err(err) = char {
-                        push_err(2, (range.start, err));
-                    }
-                })
            }
        }
-        STRING => {
+        ast::LiteralKind::Byte => {
-            if let Some(without_quotes) = unquote(text, 1, '"') {
+            if let Some(Err(e)) = unquote(text, 2, '\'').map(unescape_byte) {
-                unescape_literal(without_quotes, Mode::Str, &mut |range, char| {
+                push_err(2, e);
-                    if let Err(err) = char {
-                        push_err(1, (range.start, err));
-                    }
-                })
            }
        }
-        _ => (),
+        ast::LiteralKind::IntNumber(_)
+        | ast::LiteralKind::FloatNumber(_)
+        | ast::LiteralKind::Bool(_) => {}
    }
 }
diff --git a/crates/syntax/test_data/lexer/err/0033_unclosed_raw_string_at_eof.txt b/crates/syntax/test_data/lexer/err/0033_unclosed_raw_string_at_eof.txt
index 6fd59ccc0..54e707b73 100644
--- a/crates/syntax/test_data/lexer/err/0033_unclosed_raw_string_at_eof.txt
+++ b/crates/syntax/test_data/lexer/err/0033_unclosed_raw_string_at_eof.txt
@@ -1,2 +1,2 @@
-RAW_STRING 4 "r##\""
+STRING 4 "r##\""
 > error0..4 token("r##\"") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0034_unclosed_raw_string_with_ferris.txt b/crates/syntax/test_data/lexer/err/0034_unclosed_raw_string_with_ferris.txt
index 8d9ca0e8f..1f9889775 100644
--- a/crates/syntax/test_data/lexer/err/0034_unclosed_raw_string_with_ferris.txt
+++ b/crates/syntax/test_data/lexer/err/0034_unclosed_raw_string_with_ferris.txt
@@ -1,2 +1,2 @@
-RAW_STRING 8 "r##\"🦀"
+STRING 8 "r##\"🦀"
 > error0..8 token("r##\"🦀") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0035_unclosed_raw_string_with_ascii_escape.txt b/crates/syntax/test_data/lexer/err/0035_unclosed_raw_string_with_ascii_escape.txt
index a906380c7..93f6f72ae 100644
--- a/crates/syntax/test_data/lexer/err/0035_unclosed_raw_string_with_ascii_escape.txt
+++ b/crates/syntax/test_data/lexer/err/0035_unclosed_raw_string_with_ascii_escape.txt
@@ -1,2 +1,2 @@
-RAW_STRING 8 "r##\"\\x7f"
+STRING 8 "r##\"\\x7f"
 > error0..8 token("r##\"\\x7f") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0036_unclosed_raw_string_with_unicode_escape.txt b/crates/syntax/test_data/lexer/err/0036_unclosed_raw_string_with_unicode_escape.txt
index 5667c6149..1d2ebc60f 100644
--- a/crates/syntax/test_data/lexer/err/0036_unclosed_raw_string_with_unicode_escape.txt
+++ b/crates/syntax/test_data/lexer/err/0036_unclosed_raw_string_with_unicode_escape.txt
@@ -1,2 +1,2 @@
-RAW_STRING 12 "r##\"\\u{20AA}"
+STRING 12 "r##\"\\u{20AA}"
 > error0..12 token("r##\"\\u{20AA}") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0037_unclosed_raw_string_with_space.txt b/crates/syntax/test_data/lexer/err/0037_unclosed_raw_string_with_space.txt
index 141c8268e..c567ab7e2 100644
--- a/crates/syntax/test_data/lexer/err/0037_unclosed_raw_string_with_space.txt
+++ b/crates/syntax/test_data/lexer/err/0037_unclosed_raw_string_with_space.txt
@@ -1,2 +1,2 @@
-RAW_STRING 5 "r##\" "
+STRING 5 "r##\" "
 > error0..5 token("r##\" ") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0038_unclosed_raw_string_with_slash.txt b/crates/syntax/test_data/lexer/err/0038_unclosed_raw_string_with_slash.txt
index f61d4cc91..343b20323 100644
--- a/crates/syntax/test_data/lexer/err/0038_unclosed_raw_string_with_slash.txt
+++ b/crates/syntax/test_data/lexer/err/0038_unclosed_raw_string_with_slash.txt
@@ -1,2 +1,2 @@
-RAW_STRING 5 "r##\"\\"
+STRING 5 "r##\"\\"
 > error0..5 token("r##\"\\") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0039_unclosed_raw_string_with_slash_n.txt b/crates/syntax/test_data/lexer/err/0039_unclosed_raw_string_with_slash_n.txt
index 12e2c0fc0..041a42737 100644
--- a/crates/syntax/test_data/lexer/err/0039_unclosed_raw_string_with_slash_n.txt
+++ b/crates/syntax/test_data/lexer/err/0039_unclosed_raw_string_with_slash_n.txt
@@ -1,2 +1,2 @@
-RAW_STRING 6 "r##\"\\n"
+STRING 6 "r##\"\\n"
 > error0..6 token("r##\"\\n") msg(Missing trailing `"` with `#` symbols to terminate the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0040_unclosed_raw_byte_string_at_eof.txt b/crates/syntax/test_data/lexer/err/0040_unclosed_raw_byte_string_at_eof.txt
index fe12cb5fc..efaa1cafd 100644
--- a/crates/syntax/test_data/lexer/err/0040_unclosed_raw_byte_string_at_eof.txt
+++ b/crates/syntax/test_data/lexer/err/0040_unclosed_raw_byte_string_at_eof.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 5 "br##\""
+BYTE_STRING 5 "br##\""
 > error0..5 token("br##\"") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0041_unclosed_raw_byte_string_with_ferris.txt b/crates/syntax/test_data/lexer/err/0041_unclosed_raw_byte_string_with_ferris.txt
index 5be2a7861..b6c938f94 100644
--- a/crates/syntax/test_data/lexer/err/0041_unclosed_raw_byte_string_with_ferris.txt
+++ b/crates/syntax/test_data/lexer/err/0041_unclosed_raw_byte_string_with_ferris.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 9 "br##\"🦀"
+BYTE_STRING 9 "br##\"🦀"
 > error0..9 token("br##\"🦀") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0042_unclosed_raw_byte_string_with_ascii_escape.txt b/crates/syntax/test_data/lexer/err/0042_unclosed_raw_byte_string_with_ascii_escape.txt
index 6cbe08d07..f82efe49a 100644
--- a/crates/syntax/test_data/lexer/err/0042_unclosed_raw_byte_string_with_ascii_escape.txt
+++ b/crates/syntax/test_data/lexer/err/0042_unclosed_raw_byte_string_with_ascii_escape.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 9 "br##\"\\x7f"
+BYTE_STRING 9 "br##\"\\x7f"
 > error0..9 token("br##\"\\x7f") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0043_unclosed_raw_byte_string_with_unicode_escape.txt b/crates/syntax/test_data/lexer/err/0043_unclosed_raw_byte_string_with_unicode_escape.txt
index f56a4f984..4e4a57696 100644
--- a/crates/syntax/test_data/lexer/err/0043_unclosed_raw_byte_string_with_unicode_escape.txt
+++ b/crates/syntax/test_data/lexer/err/0043_unclosed_raw_byte_string_with_unicode_escape.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 13 "br##\"\\u{20AA}"
+BYTE_STRING 13 "br##\"\\u{20AA}"
 > error0..13 token("br##\"\\u{20AA}") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0044_unclosed_raw_byte_string_with_space.txt b/crates/syntax/test_data/lexer/err/0044_unclosed_raw_byte_string_with_space.txt
index 3d32ce34e..0018c8623 100644
--- a/crates/syntax/test_data/lexer/err/0044_unclosed_raw_byte_string_with_space.txt
+++ b/crates/syntax/test_data/lexer/err/0044_unclosed_raw_byte_string_with_space.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 6 "br##\" "
+BYTE_STRING 6 "br##\" "
 > error0..6 token("br##\" ") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0045_unclosed_raw_byte_string_with_slash.txt b/crates/syntax/test_data/lexer/err/0045_unclosed_raw_byte_string_with_slash.txt
index 320fea177..c3ba4ae82 100644
--- a/crates/syntax/test_data/lexer/err/0045_unclosed_raw_byte_string_with_slash.txt
+++ b/crates/syntax/test_data/lexer/err/0045_unclosed_raw_byte_string_with_slash.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 6 "br##\"\\"
+BYTE_STRING 6 "br##\"\\"
 > error0..6 token("br##\"\\") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0046_unclosed_raw_byte_string_with_slash_n.txt b/crates/syntax/test_data/lexer/err/0046_unclosed_raw_byte_string_with_slash_n.txt
index b3a56380c..7bda72276 100644
--- a/crates/syntax/test_data/lexer/err/0046_unclosed_raw_byte_string_with_slash_n.txt
+++ b/crates/syntax/test_data/lexer/err/0046_unclosed_raw_byte_string_with_slash_n.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 7 "br##\"\\n"
+BYTE_STRING 7 "br##\"\\n"
 > error0..7 token("br##\"\\n") msg(Missing trailing `"` with `#` symbols to terminate the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0047_unstarted_raw_string_at_eof.txt b/crates/syntax/test_data/lexer/err/0047_unstarted_raw_string_at_eof.txt
index 5af1e2d97..ce92d2ff7 100644
--- a/crates/syntax/test_data/lexer/err/0047_unstarted_raw_string_at_eof.txt
+++ b/crates/syntax/test_data/lexer/err/0047_unstarted_raw_string_at_eof.txt
@@ -1,2 +1,2 @@
-RAW_STRING 3 "r##"
+STRING 3 "r##"
 > error0..3 token("r##") msg(Missing `"` symbol after `#` symbols to begin the raw string literal)
diff --git a/crates/syntax/test_data/lexer/err/0048_unstarted_raw_byte_string_at_eof.txt b/crates/syntax/test_data/lexer/err/0048_unstarted_raw_byte_string_at_eof.txt
index aec7afd92..a75d9030c 100644
--- a/crates/syntax/test_data/lexer/err/0048_unstarted_raw_byte_string_at_eof.txt
+++ b/crates/syntax/test_data/lexer/err/0048_unstarted_raw_byte_string_at_eof.txt
@@ -1,2 +1,2 @@
-RAW_BYTE_STRING 4 "br##"
+BYTE_STRING 4 "br##"
 > error0..4 token("br##") msg(Missing `"` symbol after `#` symbols to begin the raw byte string literal)
diff --git a/crates/syntax/test_data/lexer/err/0049_unstarted_raw_string_with_ascii.txt b/crates/syntax/test_data/lexer/err/0049_unstarted_raw_string_with_ascii.txt
index e22fe5374..516e0b78e 100644
--- a/crates/syntax/test_data/lexer/err/0049_unstarted_raw_string_with_ascii.txt
+++ b/crates/syntax/test_data/lexer/err/0049_unstarted_raw_string_with_ascii.txt
@@ -1,4 +1,4 @@
-RAW_STRING 4 "r## "
+STRING 4 "r## "
 IDENT 1 "I"
 WHITESPACE 1 " "
 IDENT 4 "lack"
diff --git a/crates/syntax/test_data/lexer/err/0050_unstarted_raw_byte_string_with_ascii.txt b/crates/syntax/test_data/lexer/err/0050_unstarted_raw_byte_string_with_ascii.txt
index d74ea4c27..2f8a6f5f2 100644
--- a/crates/syntax/test_data/lexer/err/0050_unstarted_raw_byte_string_with_ascii.txt
+++ b/crates/syntax/test_data/lexer/err/0050_unstarted_raw_byte_string_with_ascii.txt
@@ -1,4 +1,4 @@
-RAW_BYTE_STRING 5 "br## "
+BYTE_STRING 5 "br## "
 IDENT 1 "I"
 WHITESPACE 1 " "
 IDENT 4 "lack"
diff --git a/crates/syntax/test_data/lexer/ok/0008_byte_strings.txt b/crates/syntax/test_data/lexer/ok/0008_byte_strings.txt
index bc03b51a8..e61ad99be 100644
--- a/crates/syntax/test_data/lexer/ok/0008_byte_strings.txt
+++ b/crates/syntax/test_data/lexer/ok/0008_byte_strings.txt
@@ -4,13 +4,13 @@ BYTE 4 "b\'x\'"
 WHITESPACE 1 " "
 BYTE_STRING 6 "b\"foo\""
 WHITESPACE 1 " "
-RAW_BYTE_STRING 4 "br\"\""
+BYTE_STRING 4 "br\"\""
 WHITESPACE 1 "\n"
 BYTE 6 "b\'\'suf"
 WHITESPACE 1 " "
 BYTE_STRING 5 "b\"\"ix"
 WHITESPACE 1 " "
-RAW_BYTE_STRING 6 "br\"\"br"
+BYTE_STRING 6 "br\"\"br"
 WHITESPACE 1 "\n"
 BYTE 5 "b\'\\n\'"
 WHITESPACE 1 " "
diff --git a/crates/syntax/test_data/lexer/ok/0009_strings.txt b/crates/syntax/test_data/lexer/ok/0009_strings.txt
index 4cb4d711d..988a8877b 100644
--- a/crates/syntax/test_data/lexer/ok/0009_strings.txt
+++ b/crates/syntax/test_data/lexer/ok/0009_strings.txt
@@ -1,6 +1,6 @@
 STRING 7 "\"hello\""
 WHITESPACE 1 " "
-RAW_STRING 8 "r\"world\""
+STRING 8 "r\"world\""
 WHITESPACE 1 " "
 STRING 17 "\"\\n\\\"\\\\no escape\""
 WHITESPACE 1 " "
diff --git a/crates/syntax/test_data/lexer/ok/0013_raw_strings.txt b/crates/syntax/test_data/lexer/ok/0013_raw_strings.txt
index 9cf0957d1..db0d5ffd1 100644
--- a/crates/syntax/test_data/lexer/ok/0013_raw_strings.txt
+++ b/crates/syntax/test_data/lexer/ok/0013_raw_strings.txt
@@ -1,2 +1,2 @@
-RAW_STRING 36 "r###\"this is a r##\"raw\"## string\"###"
+STRING 36 "r###\"this is a r##\"raw\"## string\"###"
 WHITESPACE 1 "\n"
diff --git a/crates/syntax/test_data/parser/inline/ok/0085_expr_literals.rast b/crates/syntax/test_data/parser/inline/ok/0085_expr_literals.rast
index 9a87b5b93..ae838105d 100644
--- a/crates/syntax/test_data/parser/inline/ok/0085_expr_literals.rast
+++ b/crates/syntax/test_data/parser/inline/ok/0085_expr_literals.rast
@@ -104,7 +104,7 @@ [email protected]
        [email protected] "="
        [email protected] " "
        [email protected]
-          RAW_[email protected] "r\"d\""
+          [email protected] "r\"d\""
        [email protected] ";"
      [email protected] "\n    "
      [email protected]
@@ -128,7 +128,7 @@ [email protected]
        [email protected] "="
        [email protected] " "
        [email protected]
-          RAW_[email protected] "br\"f\""
+          [email protected] "br\"f\""
        [email protected] ";"
      [email protected] "\n"
      [email protected] "}"
diff --git a/docs/dev/style.md b/docs/dev/style.md
index 8d57fc049..1a952197f 100644
--- a/docs/dev/style.md
+++ b/docs/dev/style.md
@@ -89,6 +89,32 @@ There are many benefits to this:
 It also makes sense to format snippets more compactly (for example, by placing enum definitions like `enum E { Foo, Bar }` on a single line),
 as long as they are still readable.
+When using multiline fixtures, use unindented raw string literals:
+```rust
+    #[test]
+    fn inline_field_shorthand() {
+        check_assist(
+            inline_local_variable,
+            r"
+struct S { foo: i32}
+fn main() {
+    let <|>foo = 92;
+    S { foo }
+}
+",
+            r"
+struct S { foo: i32}
+fn main() {
+    S { foo: 92 }
+}
+",
+        );
+    }
+```
+That way, you can use your editor's "number of selected characters" feature to correlate offsets with test's source code.
 ## Preconditions
 Express function preconditions in types and force the caller to provide them (rather than checking in callee):
diff --git a/editors/code/rust.tmGrammar.json b/editors/code/rust.tmGrammar.json
index 77595aa00..608a3354e 100644
--- a/editors/code/rust.tmGrammar.json
+++ b/editors/code/rust.tmGrammar.json
@@ -50,7 +50,7 @@
        {
            "comment": "macro type metavariables",
            "name": "meta.macro.metavariable.type.rust",
-            "match": "(\\$)((crate)|([A-Z][A-Za-z0-9_]*))((:)(block|expr|ident|item|lifetime|literal|meta|pat|path|stmt|tt|ty|vis))?",
+            "match": "(\\$)((crate)|([A-Z][A-Za-z0-9_]*))((:)(block|expr|ident|item|lifetime|literal|meta|path?|stmt|tt|ty|vis))?",
            "captures": {
                "1": {
                    "name": "keyword.operator.macro.dollar.rust"
@@ -77,7 +77,7 @@
        {
            "comment": "macro metavariables",
            "name": "meta.macro.metavariable.rust",
-            "match": "(\\$)([a-z][A-Za-z0-9_]*)((:)(block|expr|ident|item|lifetime|literal|meta|pat|path|stmt|tt|ty|vis))?",
+            "match": "(\\$)([a-z][A-Za-z0-9_]*)((:)(block|expr|ident|item|lifetime|literal|meta|path?|stmt|tt|ty|vis))?",
            "captures": {
                "1": {
                    "name": "keyword.operator.macro.dollar.rust"
@@ -676,11 +676,6 @@
                    "match": "\\bmut\\b"
                },
                {
-                    "comment": "math operators",
-                    "name": "keyword.operator.math.rust",
-                    "match": "(([+%]|(\\*(?!\\w)))(?!=))|(-(?!>))|(/(?!/))"
-                },
-                {
                    "comment": "logical operators",
                    "name": "keyword.operator.logical.rust",
                    "match": "(\\^|\\||\\|\\||&&|<<|>>|!)(?!=)"
@@ -693,7 +688,7 @@
                {
                    "comment": "assignment operators",
                    "name": "keyword.operator.assignment.rust",
-                    "match": "(-=|\\*=|/=|%=|\\^=|&=|\\|=|<<=|>>=)"
+                    "match": "(\\+=|-=|\\*=|/=|%=|\\^=|&=|\\|=|<<=|>>=)"
                },
                {
                    "comment": "single equal",
@@ -706,6 +701,11 @@
                    "match": "(=(=)?(?!>)|!=|<=|(?<!=)>=)"
                },
                {
+                    "comment": "math operators",
+                    "name": "keyword.operator.math.rust",
+                    "match": "(([+%]|(\\*(?!\\w)))(?!=))|(-(?!>))|(/(?!/))"
+                },
+                {
                    "comment": "less than, greater than (special case)",
                    "match": "(?:\\b|(?:(\\))|(\\])|(\\})))[ \\t]+([<>])[ \\t]+(?:\\b|(?:(\\()|(\\[)|(\\{)))",
                    "captures": {
@@ -1127,7 +1127,7 @@
                {
                    "comment": "variables",
                    "name": "variable.other.rust",
-                    "match": "\\b(?<!\\.)(?:r#(?!(crate|[Ss]elf|super)))?[a-z0-9_]+\\b"
+                    "match": "\\b(?<!(?<!\\.)\\.)(?:r#(?!(crate|[Ss]elf|super)))?[a-z0-9_]+\\b"
                }
            ]
        }
diff --git a/xtask/src/ast_src.rs b/xtask/src/ast_src.rs
index adc191254..8ceaaf60e 100644
--- a/xtask/src/ast_src.rs
+++ b/xtask/src/ast_src.rs
@@ -71,16 +71,7 @@ pub(crate) const KINDS_SRC: KindsSrc = KindsSrc {
        "trait", "true", "try", "type", "unsafe", "use", "where", "while",
    ],
    contextual_keywords: &["auto", "default", "existential", "union", "raw"],
-    literals: &[
+    literals: &["INT_NUMBER", "FLOAT_NUMBER", "CHAR", "BYTE", "STRING", "BYTE_STRING"],
-        "INT_NUMBER",
-        "FLOAT_NUMBER",
-        "CHAR",
-        "BYTE",
-        "STRING",
-        "RAW_STRING",
-        "BYTE_STRING",
-        "RAW_BYTE_STRING",
-    ],
    tokens: &[
        "ERROR",
        "IDENT",
diff --git a/xtask/src/codegen/gen_syntax.rs b/xtask/src/codegen/gen_syntax.rs
index 02f4095ce..44460effa 100644
--- a/xtask/src/codegen/gen_syntax.rs
+++ b/xtask/src/codegen/gen_syntax.rs
@@ -504,7 +504,11 @@ impl Field {
 fn lower(grammar: &Grammar) -> AstSrc {
    let mut res = AstSrc::default();
-    res.tokens = vec!["Whitespace".into(), "Comment".into(), "String".into(), "RawString".into()];
+    res.tokens = "Whitespace Comment String ByteString IntNumber FloatNumber"
+        .split_ascii_whitespace()
+        .map(|it| it.to_string())
+        .collect::<Vec<_>>();
    let nodes = grammar.iter().collect::<Vec<_>>();