17 files changed, 301 insertions, 73 deletions

diff --git a/crates/completion/src/completions/qualified_path.rs b/crates/completion/src/completions/qualified_path.rs
index 1300f00b2..882c4dcbc 100644
--- a/crates/completion/src/completions/qualified_path.rs
+++ b/crates/completion/src/completions/qualified_path.rs
@@ -118,6 +118,12 @@ pub(crate) fn complete_qualified_path(acc: &mut Completions, ctx: &CompletionCon
                     _ => return,
                 };
 
+                if let Some(Adt::Enum(e)) = ty.as_adt() {
+                    for variant in e.variants(ctx.db) {
+                        acc.add_enum_variant(ctx, variant, None);
+                    }
+                }
+
                 let traits_in_scope = ctx.scope.traits_in_scope();
                 let mut seen = FxHashSet::default();
                 ty.iterate_path_candidates(ctx.db, krate, &traits_in_scope, None, |_ty, item| {
@@ -752,4 +758,27 @@ fn main() {
             "#]],
         );
     }
+
+    #[test]
+    fn completes_self_enum() {
+        check(
+            r#"
+enum Foo {
+    Bar,
+    Baz,
+}
+
+impl Foo {
+    fn foo(self) {
+        Self::<|>
+    }
+}
+"#,
+            expect![[r#"
+                ev Bar    ()
+                ev Baz    ()
+                me foo(…) fn foo(self)
+            "#]],
+        );
+    }
 }
diff --git a/crates/completion/src/completions/unqualified_path.rs b/crates/completion/src/completions/unqualified_path.rs
index 099ffb4d4..d09849752 100644
--- a/crates/completion/src/completions/unqualified_path.rs
+++ b/crates/completion/src/completions/unqualified_path.rs
@@ -1,5 +1,7 @@
 //! Completion of names from the current scope, e.g. locals and imported items.
 
+use std::iter;
+
 use either::Either;
 use hir::{Adt, ModPath, ModuleDef, ScopeDef, Type};
 use ide_db::helpers::insert_use::ImportScope;
@@ -50,7 +52,9 @@ pub(crate) fn complete_unqualified_path(acc: &mut Completions, ctx: &CompletionC
 }
 
 fn complete_enum_variants(acc: &mut Completions, ctx: &CompletionContext, ty: &Type) {
-    if let Some(Adt::Enum(enum_data)) = ty.as_adt() {
+    if let Some(Adt::Enum(enum_data)) =
+        iter::successors(Some(ty.clone()), |ty| ty.remove_ref()).last().and_then(|ty| ty.as_adt())
+    {
         let variants = enum_data.variants(ctx.db);
 
         let module = if let Some(module) = ctx.scope.module() {
@@ -701,6 +705,7 @@ fn main() { <|> }
             "#]],
         );
     }
+
     #[test]
     fn completes_enum_variant_matcharm() {
         check(
@@ -722,6 +727,26 @@ fn main() {
     }
 
     #[test]
+    fn completes_enum_variant_matcharm_ref() {
+        check(
+            r#"
+enum Foo { Bar, Baz, Quux }
+
+fn main() {
+    let foo = Foo::Quux;
+    match &foo { Qu<|> }
+}
+"#,
+            expect![[r#"
+                ev Foo::Bar  ()
+                ev Foo::Baz  ()
+                ev Foo::Quux ()
+                en Foo
+            "#]],
+        )
+    }
+
+    #[test]
     fn completes_enum_variant_iflet() {
         check(
             r#"
diff --git a/crates/hir_def/src/body/lower.rs b/crates/hir_def/src/body/lower.rs
index 0f404be1b..978c3a324 100644
--- a/crates/hir_def/src/body/lower.rs
+++ b/crates/hir_def/src/body/lower.rs
@@ -933,7 +933,9 @@ impl ExprCollector<'_> {
                 Pat::Box { inner }
             }
             // FIXME: implement
-            ast::Pat::RangePat(_) | ast::Pat::MacroPat(_) => Pat::Missing,
+            ast::Pat::RangePat(_) | ast::Pat::MacroPat(_) | ast::Pat::ConstBlockPat(_) => {
+                Pat::Missing
+            }
         };
         let ptr = AstPtr::new(&pat);
         self.alloc_pat(pattern, Either::Left(ptr))
diff --git a/crates/hir_ty/Cargo.toml b/crates/hir_ty/Cargo.toml
index 289e812fe..965c1780a 100644
--- a/crates/hir_ty/Cargo.toml
+++ b/crates/hir_ty/Cargo.toml
@@ -17,9 +17,9 @@ ena = "0.14.0"
 log = "0.4.8"
 rustc-hash = "1.1.0"
 scoped-tls = "1"
-chalk-solve = { version = "0.43", default-features = false }
-chalk-ir = "0.43"
-chalk-recursive = "0.43"
+chalk-solve = { version = "0.45", default-features = false }
+chalk-ir = "0.45"
+chalk-recursive = "0.45"
 
 stdx = { path = "../stdx", version = "0.0.0" }
 hir_def = { path = "../hir_def", version = "0.0.0" }
diff --git a/crates/hir_ty/src/traits/chalk.rs b/crates/hir_ty/src/traits/chalk.rs
index 69eae6f79..2196af677 100644
--- a/crates/hir_ty/src/traits/chalk.rs
+++ b/crates/hir_ty/src/traits/chalk.rs
@@ -56,8 +56,13 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
     fn adt_datum(&self, struct_id: AdtId) -> Arc<StructDatum> {
         self.db.struct_datum(self.krate, struct_id)
     }
-    fn adt_repr(&self, _struct_id: AdtId) -> rust_ir::AdtRepr {
-        rust_ir::AdtRepr { repr_c: false, repr_packed: false }
+    fn adt_repr(&self, _struct_id: AdtId) -> Arc<rust_ir::AdtRepr<Interner>> {
+        // FIXME: keep track of these
+        Arc::new(rust_ir::AdtRepr { c: false, packed: false, int: None })
+    }
+    fn discriminant_type(&self, _ty: chalk_ir::Ty<Interner>) -> chalk_ir::Ty<Interner> {
+        // FIXME: keep track of this
+        chalk_ir::TyKind::Scalar(chalk_ir::Scalar::Uint(chalk_ir::UintTy::U32)).intern(&Interner)
     }
     fn impl_datum(&self, impl_id: ImplId) -> Arc<ImplDatum> {
         self.db.impl_datum(self.krate, impl_id)
@@ -457,6 +462,7 @@ fn well_known_trait_from_lang_attr(name: &str) -> Option<WellKnownTrait> {
         "fn" => WellKnownTrait::Fn,
         "unsize" => WellKnownTrait::Unsize,
         "coerce_unsized" => WellKnownTrait::CoerceUnsized,
+        "discriminant_kind" => WellKnownTrait::DiscriminantKind,
         _ => return None,
     })
 }
@@ -473,6 +479,7 @@ fn lang_attr_from_well_known_trait(attr: WellKnownTrait) -> &'static str {
         WellKnownTrait::Unsize => "unsize",
         WellKnownTrait::Unpin => "unpin",
         WellKnownTrait::CoerceUnsized => "coerce_unsized",
+        WellKnownTrait::DiscriminantKind => "discriminant_kind",
     }
 }
 
diff --git a/crates/parser/src/grammar/expressions/atom.rs b/crates/parser/src/grammar/expressions/atom.rs
index e897d5a52..c7a3556a7 100644
--- a/crates/parser/src/grammar/expressions/atom.rs
+++ b/crates/parser/src/grammar/expressions/atom.rs
@@ -46,6 +46,7 @@ pub(super) const ATOM_EXPR_FIRST: TokenSet =
         T![continue],
         T![async],
         T![try],
+        T![const],
         T![loop],
         T![for],
         LIFETIME_IDENT,
@@ -115,6 +116,14 @@ pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMar
             block_expr(p);
             m.complete(p, EFFECT_EXPR)
         }
+        // test const_block
+        // fn f() { const { } }
+        T![const] if la == T!['{'] => {
+            let m = p.start();
+            p.bump(T![const]);
+            block_expr(p);
+            m.complete(p, EFFECT_EXPR)
+        }
         T!['{'] => {
             // test for_range_from
             // fn foo() {
diff --git a/crates/parser/src/grammar/items.rs b/crates/parser/src/grammar/items.rs
index 8999829b4..72b73f891 100644
--- a/crates/parser/src/grammar/items.rs
+++ b/crates/parser/src/grammar/items.rs
@@ -96,7 +96,10 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker) -> Result<(), Marker> {
     let mut has_mods = false;
 
     // modifiers
-    has_mods |= p.eat(T![const]);
+    if p.at(T![const]) && p.nth(1) != T!['{'] {
+        p.eat(T![const]);
+        has_mods = true;
+    }
 
     // test_err async_without_semicolon
     // fn foo() { let _ = async {} }
@@ -167,7 +170,7 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker) -> Result<(), Marker> {
             m.complete(p, TRAIT);
         }
 
-        T![const] => {
+        T![const] if p.nth(1) != T!['{'] => {
             consts::konst(p, m);
         }
 
diff --git a/crates/parser/src/grammar/patterns.rs b/crates/parser/src/grammar/patterns.rs
index 7e7f73dee..b53d5749f 100644
--- a/crates/parser/src/grammar/patterns.rs
+++ b/crates/parser/src/grammar/patterns.rs
@@ -89,6 +89,7 @@ fn atom_pat(p: &mut Parser, recovery_set: TokenSet) -> Option<CompletedMarker> {
     let m = match p.nth(0) {
         T![box] => box_pat(p),
         T![ref] | T![mut] => ident_pat(p, true),
+        T![const] => const_block_pat(p),
         IDENT => match p.nth(1) {
             // Checks the token after an IDENT to see if a pattern is a path (Struct { .. }) or macro
             // (T![x]).
@@ -386,3 +387,16 @@ fn box_pat(p: &mut Parser) -> CompletedMarker {
     pattern_single(p);
     m.complete(p, BOX_PAT)
 }
+
+// test const_block_pat
+// fn main() {
+//     let const { 15 } = ();
+//     let const { foo(); bar() } = ();
+// }
+fn const_block_pat(p: &mut Parser) -> CompletedMarker {
+    assert!(p.at(T![const]));
+    let m = p.start();
+    p.bump(T![const]);
+    expressions::block_expr(p);
+    m.complete(p, CONST_BLOCK_PAT)
+}
diff --git a/crates/parser/src/syntax_kind/generated.rs b/crates/parser/src/syntax_kind/generated.rs
index 980aa5979..f69e71bdb 100644
--- a/crates/parser/src/syntax_kind/generated.rs
+++ b/crates/parser/src/syntax_kind/generated.rs
@@ -170,6 +170,7 @@ pub enum SyntaxKind {
     RANGE_PAT,
     LITERAL_PAT,
     MACRO_PAT,
+    CONST_BLOCK_PAT,
     TUPLE_EXPR,
     ARRAY_EXPR,
     PAREN_EXPR,
diff --git a/crates/rust-analyzer/src/handlers.rs b/crates/rust-analyzer/src/handlers.rs
index 66f8bee99..55bc2bcec 100644
--- a/crates/rust-analyzer/src/handlers.rs
+++ b/crates/rust-analyzer/src/handlers.rs
@@ -5,11 +5,13 @@
 use std::{
     io::Write as _,
     process::{self, Stdio},
+    sync::Arc,
 };
 
 use ide::{
-    CompletionResolveCapability, FileId, FilePosition, FileRange, HoverAction, HoverGotoTypeData,
-    NavigationTarget, Query, RangeInfo, Runnable, RunnableKind, SearchScope, SymbolKind, TextEdit,
+    AssistConfig, CompletionResolveCapability, FileId, FilePosition, FileRange, HoverAction,
+    HoverGotoTypeData, LineIndex, NavigationTarget, Query, RangeInfo, Runnable, RunnableKind,
+    SearchScope, SymbolKind, TextEdit,
 };
 use itertools::Itertools;
 use lsp_server::ErrorCode;
@@ -865,58 +867,8 @@ pub(crate) fn handle_formatting(
     }
 }
 
-fn handle_fixes(
-    snap: &GlobalStateSnapshot,
-    params: &lsp_types::CodeActionParams,
-    res: &mut Vec<lsp_ext::CodeAction>,
-) -> Result<()> {
-    let file_id = from_proto::file_id(&snap, &params.text_document.uri)?;
-    let line_index = snap.analysis.file_line_index(file_id)?;
-    let range = from_proto::text_range(&line_index, params.range);
-
-    match &params.context.only {
-        Some(v) => {
-            if !v.iter().any(|it| {
-                it == &lsp_types::CodeActionKind::EMPTY
-                    || it == &lsp_types::CodeActionKind::QUICKFIX
-            }) {
-                return Ok(());
-            }
-        }
-        None => {}
-    };
-
-    let diagnostics = snap.analysis.diagnostics(&snap.config.diagnostics, file_id)?;
-
-    for fix in diagnostics
-        .into_iter()
-        .filter_map(|d| d.fix)
-        .filter(|fix| fix.fix_trigger_range.intersect(range).is_some())
-    {
-        let edit = to_proto::snippet_workspace_edit(&snap, fix.source_change)?;
-        let action = lsp_ext::CodeAction {
-            title: fix.label.to_string(),
-            group: None,
-            kind: Some(CodeActionKind::QUICKFIX),
-            edit: Some(edit),
-            is_preferred: Some(false),
-            data: None,
-        };
-        res.push(action);
-    }
-
-    for fix in snap.check_fixes.get(&file_id).into_iter().flatten() {
-        let fix_range = from_proto::text_range(&line_index, fix.range);
-        if fix_range.intersect(range).is_none() {
-            continue;
-        }
-        res.push(fix.action.clone());
-    }
-    Ok(())
-}
-
 pub(crate) fn handle_code_action(
-    mut snap: GlobalStateSnapshot,
+    snap: GlobalStateSnapshot,
     params: lsp_types::CodeActionParams,
 ) -> Result<Option<Vec<lsp_ext::CodeAction>>> {
     let _p = profile::span("handle_code_action");
@@ -932,24 +884,35 @@ pub(crate) fn handle_code_action(
     let range = from_proto::text_range(&line_index, params.range);
     let frange = FileRange { file_id, range };
 
-    snap.config.assist.allowed = params
-        .clone()
-        .context
-        .only
-        .map(|it| it.into_iter().filter_map(from_proto::assist_kind).collect());
+    let assists_config = AssistConfig {
+        allowed: params
+            .clone()
+            .context
+            .only
+            .map(|it| it.into_iter().filter_map(from_proto::assist_kind).collect()),
+        ..snap.config.assist
+    };
 
     let mut res: Vec<lsp_ext::CodeAction> = Vec::new();
 
-    handle_fixes(&snap, &params, &mut res)?;
+    let include_quick_fixes = match &params.context.only {
+        Some(v) => v.iter().any(|it| {
+            it == &lsp_types::CodeActionKind::EMPTY || it == &lsp_types::CodeActionKind::QUICKFIX
+        }),
+        None => true,
+    };
+    if include_quick_fixes {
+        add_quick_fixes(&snap, frange, &line_index, &mut res)?;
+    }
 
     if snap.config.client_caps.code_action_resolve {
         for (index, assist) in
-            snap.analysis.unresolved_assists(&snap.config.assist, frange)?.into_iter().enumerate()
+            snap.analysis.unresolved_assists(&assists_config, frange)?.into_iter().enumerate()
         {
             res.push(to_proto::unresolved_code_action(&snap, params.clone(), assist, index)?);
         }
     } else {
-        for assist in snap.analysis.resolved_assists(&snap.config.assist, frange)?.into_iter() {
+        for assist in snap.analysis.resolved_assists(&assists_config, frange)?.into_iter() {
             res.push(to_proto::resolved_code_action(&snap, assist)?);
         }
     }
@@ -957,6 +920,40 @@ pub(crate) fn handle_code_action(
     Ok(Some(res))
 }
 
+fn add_quick_fixes(
+    snap: &GlobalStateSnapshot,
+    frange: FileRange,
+    line_index: &Arc<LineIndex>,
+    acc: &mut Vec<lsp_ext::CodeAction>,
+) -> Result<()> {
+    let diagnostics = snap.analysis.diagnostics(&snap.config.diagnostics, frange.file_id)?;
+
+    for fix in diagnostics
+        .into_iter()
+        .filter_map(|d| d.fix)
+        .filter(|fix| fix.fix_trigger_range.intersect(frange.range).is_some())
+    {
+        let edit = to_proto::snippet_workspace_edit(&snap, fix.source_change)?;
+        let action = lsp_ext::CodeAction {
+            title: fix.label.to_string(),
+            group: None,
+            kind: Some(CodeActionKind::QUICKFIX),
+            edit: Some(edit),
+            is_preferred: Some(false),
+            data: None,
+        };
+        acc.push(action);
+    }
+
+    for fix in snap.check_fixes.get(&frange.file_id).into_iter().flatten() {
+        let fix_range = from_proto::text_range(&line_index, fix.range);
+        if fix_range.intersect(frange.range).is_some() {
+            acc.push(fix.action.clone());
+        }
+    }
+    Ok(())
+}
+
 pub(crate) fn handle_code_action_resolve(
     mut snap: GlobalStateSnapshot,
     mut code_action: lsp_ext::CodeAction,
diff --git a/crates/syntax/Cargo.toml b/crates/syntax/Cargo.toml
index c6a6f11e1..21015591c 100644
--- a/crates/syntax/Cargo.toml
+++ b/crates/syntax/Cargo.toml
@@ -13,7 +13,7 @@ doctest = false
 [dependencies]
 itertools = "0.9.0"
 rowan = "0.10.0"
-rustc_lexer = { version = "691.0.0", package = "rustc-ap-rustc_lexer" }
+rustc_lexer = { version = "695.0.0", package = "rustc-ap-rustc_lexer" }
 rustc-hash = "1.1.0"
 arrayvec = "0.5.1"
 once_cell = "1.3.1"
diff --git a/crates/syntax/src/ast/generated/nodes.rs b/crates/syntax/src/ast/generated/nodes.rs
index 1588ba93e..c5b80bffe 100644
--- a/crates/syntax/src/ast/generated/nodes.rs
+++ b/crates/syntax/src/ast/generated/nodes.rs
@@ -763,6 +763,7 @@ impl EffectExpr {
     pub fn try_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![try]) }
     pub fn unsafe_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![unsafe]) }
     pub fn async_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![async]) }
+    pub fn const_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![const]) }
     pub fn block_expr(&self) -> Option<BlockExpr> { support::child(&self.syntax) }
 }
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
@@ -1251,6 +1252,14 @@ impl TupleStructPat {
     pub fn r_paren_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![')']) }
 }
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct ConstBlockPat {
+    pub(crate) syntax: SyntaxNode,
+}
+impl ConstBlockPat {
+    pub fn const_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![const]) }
+    pub fn block_expr(&self) -> Option<BlockExpr> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct RecordPatFieldList {
     pub(crate) syntax: SyntaxNode,
 }
@@ -1369,6 +1378,7 @@ pub enum Pat {
     SlicePat(SlicePat),
     TuplePat(TuplePat),
     TupleStructPat(TupleStructPat),
+    ConstBlockPat(ConstBlockPat),
 }
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum FieldList {
@@ -2772,6 +2782,17 @@ impl AstNode for TupleStructPat {
     }
     fn syntax(&self) -> &SyntaxNode { &self.syntax }
 }
+impl AstNode for ConstBlockPat {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == CONST_BLOCK_PAT }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
 impl AstNode for RecordPatFieldList {
     fn can_cast(kind: SyntaxKind) -> bool { kind == RECORD_PAT_FIELD_LIST }
     fn cast(syntax: SyntaxNode) -> Option<Self> {
@@ -3242,12 +3263,15 @@ impl From<TuplePat> for Pat {
 impl From<TupleStructPat> for Pat {
     fn from(node: TupleStructPat) -> Pat { Pat::TupleStructPat(node) }
 }
+impl From<ConstBlockPat> for Pat {
+    fn from(node: ConstBlockPat) -> Pat { Pat::ConstBlockPat(node) }
+}
 impl AstNode for Pat {
     fn can_cast(kind: SyntaxKind) -> bool {
         match kind {
             IDENT_PAT | BOX_PAT | REST_PAT | LITERAL_PAT | MACRO_PAT | OR_PAT | PAREN_PAT
             | PATH_PAT | WILDCARD_PAT | RANGE_PAT | RECORD_PAT | REF_PAT | SLICE_PAT
-            | TUPLE_PAT | TUPLE_STRUCT_PAT => true,
+            | TUPLE_PAT | TUPLE_STRUCT_PAT | CONST_BLOCK_PAT => true,
             _ => false,
         }
     }
@@ -3268,6 +3292,7 @@ impl AstNode for Pat {
             SLICE_PAT => Pat::SlicePat(SlicePat { syntax }),
             TUPLE_PAT => Pat::TuplePat(TuplePat { syntax }),
             TUPLE_STRUCT_PAT => Pat::TupleStructPat(TupleStructPat { syntax }),
+            CONST_BLOCK_PAT => Pat::ConstBlockPat(ConstBlockPat { syntax }),
             _ => return None,
         };
         Some(res)
@@ -3289,6 +3314,7 @@ impl AstNode for Pat {
             Pat::SlicePat(it) => &it.syntax,
             Pat::TuplePat(it) => &it.syntax,
             Pat::TupleStructPat(it) => &it.syntax,
+            Pat::ConstBlockPat(it) => &it.syntax,
         }
     }
 }
@@ -4137,6 +4163,11 @@ impl std::fmt::Display for TupleStructPat {
         std::fmt::Display::fmt(self.syntax(), f)
     }
 }
+impl std::fmt::Display for ConstBlockPat {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
 impl std::fmt::Display for RecordPatFieldList {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         std::fmt::Display::fmt(self.syntax(), f)
diff --git a/crates/syntax/src/ast/make.rs b/crates/syntax/src/ast/make.rs
index ba7e5d2fb..cafa4c198 100644
--- a/crates/syntax/src/ast/make.rs
+++ b/crates/syntax/src/ast/make.rs
@@ -4,6 +4,11 @@
 //! Note that all functions here intended to be stupid constructors, which just
 //! assemble a finish node from immediate children. If you want to do something
 //! smarter than that, it probably doesn't belong in this module.
+//!
+//! Keep in mind that `from_text` functions should be kept private. The public
+//! API should require to assemble every node piecewise. The trick of
+//! `parse(format!())` we use internally is an implementation detail -- long
+//! term, it will be replaced with direct tree manipulation.
 use itertools::Itertools;
 use stdx::format_to;
 
@@ -16,7 +21,8 @@ pub fn name(text: &str) -> ast::Name {
 pub fn name_ref(text: &str) -> ast::NameRef {
     ast_from_text(&format!("fn f() {{ {}; }}", text))
 }
-
+// FIXME: replace stringly-typed constructor with a family of typed ctors, a-la
+// `expr_xxx`.
 pub fn ty(text: &str) -> ast::Type {
     ast_from_text(&format!("impl {} for D {{}};", text))
 }
diff --git a/crates/syntax/test_data/parser/inline/ok/0156_const_block_pat.rast b/crates/syntax/test_data/parser/inline/ok/0156_const_block_pat.rast
new file mode 100644
index 000000000..8ff4822c4
--- /dev/null
+++ b/crates/syntax/test_data/parser/inline/ok/0156_const_block_pat.rast
@@ -0,0 +1,76 @@
+[email protected]
+  [email protected]
+    [email protected] "fn"
+    [email protected] " "
+    [email protected]
+      [email protected] "main"
+    [email protected]
+      [email protected] "("
+      [email protected] ")"
+    [email protected] " "
+    [email protected]
+      [email protected] "{"
+      [email protected] "\n    "
+      [email protected]
+        [email protected] "let"
+        [email protected] " "
+        [email protected]
+          [email protected] "const"
+          [email protected] " "
+          [email protected]
+            [email protected] "{"
+            [email protected] " "
+            [email protected]
+              [email protected] "15"
+            [email protected] " "
+            [email protected] "}"
+        [email protected] " "
+        [email protected] "="
+        [email protected] " "
+        [email protected]
+          [email protected] "("
+          [email protected] ")"
+        [email protected] ";"
+      [email protected] "\n    "
+      [email protected]
+        [email protected] "let"
+        [email protected] " "
+        [email protected]
+          [email protected] "const"
+          [email protected] " "
+          [email protected]
+            [email protected] "{"
+            [email protected] " "
+            [email protected]
+              [email protected]
+                [email protected]
+                  [email protected]
+                    [email protected]
+                      [email protected]
+                        [email protected] "foo"
+                [email protected]
+                  [email protected] "("
+                  [email protected] ")"
+              [email protected] ";"
+            [email protected] " "
+            [email protected]
+              [email protected]
+                [email protected]
+                  [email protected]
+                    [email protected]
+                      [email protected] "bar"
+              [email protected]
+                [email protected] "("
+                [email protected] ")"
+            [email protected] " "
+            [email protected] "}"
+        [email protected] " "
+        [email protected] "="
+        [email protected] " "
+        [email protected]
+          [email protected] "("
+          [email protected] ")"
+        [email protected] ";"
+      [email protected] "\n"
+      [email protected] "}"
+  [email protected] "\n"
diff --git a/crates/syntax/test_data/parser/inline/ok/0156_const_block_pat.rs b/crates/syntax/test_data/parser/inline/ok/0156_const_block_pat.rs
new file mode 100644
index 000000000..dce9defac
--- /dev/null
+++ b/crates/syntax/test_data/parser/inline/ok/0156_const_block_pat.rs
@@ -0,0 +1,4 @@
+fn main() {
+    let const { 15 } = ();
+    let const { foo(); bar() } = ();
+}
diff --git a/crates/syntax/test_data/parser/inline/ok/0157_const_block.rast b/crates/syntax/test_data/parser/inline/ok/0157_const_block.rast
new file mode 100644
index 000000000..d5d2c8fe3
--- /dev/null
+++ b/crates/syntax/test_data/parser/inline/ok/0157_const_block.rast
@@ -0,0 +1,23 @@
+[email protected]
+  [email protected]
+    [email protected] "fn"
+    [email protected] " "
+    [email protected]
+      [email protected] "f"
+    [email protected]
+      [email protected] "("
+      [email protected] ")"
+    [email protected] " "
+    [email protected]
+      [email protected] "{"
+      [email protected] " "
+      [email protected]
+        [email protected] "const"
+        [email protected] " "
+        [email protected]
+          [email protected] "{"
+          [email protected] " "
+          [email protected] "}"
+      [email protected] " "
+      [email protected] "}"
+  [email protected] "\n"
diff --git a/crates/syntax/test_data/parser/inline/ok/0157_const_block.rs b/crates/syntax/test_data/parser/inline/ok/0157_const_block.rs
new file mode 100644
index 000000000..a2e3565a3
--- /dev/null
+++ b/crates/syntax/test_data/parser/inline/ok/0157_const_block.rs
@@ -0,0 +1 @@
+fn f() { const { } }