Merge #5624

5624: Finalize expressions grammar r=matklad a=matklad

bors r+
🤖

Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>

Author: bors[bot]

crates/ra_assists/src/handlers/extract_variable.rs

@@ -1,7 +1,7 @@
 use ra_syntax::{
     ast::{self, AstNode},
     SyntaxKind::{
-        BLOCK_EXPR, BREAK_EXPR, COMMENT, LAMBDA_EXPR, LOOP_EXPR, MATCH_ARM, PATH_EXPR, RETURN_EXPR,
+        BLOCK_EXPR, BREAK_EXPR, CLOSURE_EXPR, COMMENT, LOOP_EXPR, MATCH_ARM, PATH_EXPR, RETURN_EXPR,
     },
     SyntaxNode,
 };
@@ -148,7 +148,7 @@ impl Anchor {
             }
 
             if let Some(parent) = node.parent() {
-                if parent.kind() == MATCH_ARM || parent.kind() == LAMBDA_EXPR {
+                if parent.kind() == MATCH_ARM || parent.kind() == CLOSURE_EXPR {
                     return Some(Anchor::WrapInBlock(node));
                 }
             }

crates/ra_hir_def/src/body/lower.rs

@@ -224,9 +224,22 @@ impl ExprCollector<'_> {
                     self.alloc_expr(Expr::Unsafe { body }, syntax_ptr)
                 }
                 // FIXME: we need to record these effects somewhere...
-                ast::Effect::Async(_) | ast::Effect::Label(_) => {
-                    self.collect_block_opt(e.block_expr())
-                }
+                ast::Effect::Label(label) => match e.block_expr() {
+                    Some(block) => {
+                        let res = self.collect_block(block);
+                        match &mut self.body.exprs[res] {
+                            Expr::Block { label: block_label, .. } => {
+                                *block_label =
+                                    label.lifetime_token().map(|t| Name::new_lifetime(&t))
+                            }
+                            _ => unreachable!(),
+                        }
+                        res
+                    }
+                    None => self.missing_expr(),
+                },
+                // FIXME: we need to record these effects somewhere...
+                ast::Effect::Async(_) => self.collect_block_opt(e.block_expr()),
             },
             ast::Expr::BlockExpr(e) => self.collect_block(e),
             ast::Expr::LoopExpr(e) => {
@@ -460,7 +473,7 @@ impl ExprCollector<'_> {
                     self.alloc_expr(Expr::Missing, syntax_ptr)
                 }
             }
-            ast::Expr::LambdaExpr(e) => {
+            ast::Expr::ClosureExpr(e) => {
                 let mut args = Vec::new();
                 let mut arg_types = Vec::new();
                 if let Some(pl) = e.param_list() {
@@ -618,8 +631,7 @@ impl ExprCollector<'_> {
             })
             .collect();
         let tail = block.expr().map(|e| self.collect_expr(e));
-        let label = block.label().and_then(|l| l.lifetime_token()).map(|t| Name::new_lifetime(&t));
-        self.alloc_expr(Expr::Block { statements, tail, label }, syntax_node_ptr)
+        self.alloc_expr(Expr::Block { statements, tail, label: None }, syntax_node_ptr)
     }
 
     fn collect_block_items(&mut self, block: &ast::BlockExpr) {

crates/ra_hir_expand/src/db.rs

@@ -379,7 +379,7 @@ fn to_fragment_kind(db: &dyn AstDatabase, id: MacroCallId) -> FragmentKind {
 
         FOR_EXPR => FragmentKind::Expr,
         PATH_EXPR => FragmentKind::Expr,
-        LAMBDA_EXPR => FragmentKind::Expr,
+        CLOSURE_EXPR => FragmentKind::Expr,
         CONDITION => FragmentKind::Expr,
         BREAK_EXPR => FragmentKind::Expr,
         RETURN_EXPR => FragmentKind::Expr,

crates/ra_ide/src/completion/patterns.rs

@@ -134,7 +134,7 @@ pub(crate) fn is_in_loop_body(element: SyntaxElement) -> bool {
         NodeOrToken::Token(token) => token.parent(),
     };
     for node in leaf.ancestors() {
-        if node.kind() == FN || node.kind() == LAMBDA_EXPR {
+        if node.kind() == FN || node.kind() == CLOSURE_EXPR {
             break;
         }
         let loop_body = match_ast! {

crates/ra_parser/src/grammar/expressions/atom.rs

@@ -250,7 +250,7 @@ fn lambda_expr(p: &mut Parser) -> CompletedMarker {
             p.error("expected expression");
         }
     }
-    m.complete(p, LAMBDA_EXPR)
+    m.complete(p, CLOSURE_EXPR)
 }
 
 // test if_expr

crates/ra_parser/src/syntax_kind/generated.rs

@@ -173,7 +173,7 @@ pub enum SyntaxKind {
     ARRAY_EXPR,
     PAREN_EXPR,
     PATH_EXPR,
-    LAMBDA_EXPR,
+    CLOSURE_EXPR,
     IF_EXPR,
     WHILE_EXPR,
     CONDITION,