Merge #11461

[rust.git] / crates / parser / src / grammar / expressions / atom.rs

diff --git a/crates/parser/src/grammar/expressions/atom.rs b/crates/parser/src/grammar/expressions/atom.rs
index bfa02aa2220d93bfe812fd50acdb398c50c8e67e..e2c1b1fec579ce7358aef88a16b30f1d9d0f43d5 100644 (file)
--- a/crates/parser/src/grammar/expressions/atom.rs
+++ b/crates/parser/src/grammar/expressions/atom.rs
@@ -39,7 +39,6 @@ pub(crate) fn literal(p: &mut Parser) -> Option<CompletedMarker> {
         T!['('],
         T!['{'],
         T!['['],
-        L_DOLLAR,
         T![|],
         T![move],
         T![box],
@@ -59,7 +58,7 @@ pub(crate) fn literal(p: &mut Parser) -> Option<CompletedMarker> {
         LIFETIME_IDENT,
     ]));
 
-const EXPR_RECOVERY_SET: TokenSet = TokenSet::new(&[T![let], R_DOLLAR]);
+const EXPR_RECOVERY_SET: TokenSet = TokenSet::new(&[T![let]]);
 
 pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMarker, BlockLike)> {
     if let Some(m) = literal(p) {
@@ -72,11 +71,15 @@ pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMar
     let done = match p.current() {
         T!['('] => tuple_expr(p),
         T!['['] => array_expr(p),
-        L_DOLLAR => meta_var_expr(p),
         T![|] => closure_expr(p),
-        T![move] if la == T![|] => closure_expr(p),
-        T![async] if la == T![|] || (la == T![move] && p.nth(2) == T![|]) => closure_expr(p),
+        T![static] | T![async] | T![move] if la == T![|] => closure_expr(p),
+        T![static] | T![async] if la == T![move] && p.nth(2) == T![|] => closure_expr(p),
+        T![static] if la == T![async] && p.nth(2) == T![|] => closure_expr(p),
+        T![static] if la == T![async] && p.nth(2) == T![move] && p.nth(3) == T![|] => {
+            closure_expr(p)
+        }
         T![if] => if_expr(p),
+        T![let] => let_expr(p),
 
         T![loop] => loop_expr(p, None),
         T![box] => box_expr(p, None),
@@ -236,6 +239,10 @@ fn array_expr(p: &mut Parser) -> CompletedMarker {
 //     async || {};
 //     move || {};
 //     async move || {};
+//     static || {};
+//     static move || {};
+//     static async || {};
+//     static async move || {};
 // }
 fn closure_expr(p: &mut Parser) -> CompletedMarker {
     assert!(
@@ -243,8 +250,16 @@ fn closure_expr(p: &mut Parser) -> CompletedMarker {
             || (p.at(T![move]) && p.nth(1) == T![|])
             || (p.at(T![async]) && p.nth(1) == T![|])
             || (p.at(T![async]) && p.nth(1) == T![move] && p.nth(2) == T![|])
+            || (p.at(T![static]) && p.nth(1) == T![|])
+            || (p.at(T![static]) && p.nth(1) == T![move] && p.nth(2) == T![|])
+            || (p.at(T![static]) && p.nth(1) == T![async] && p.nth(2) == T![|])
+            || (p.at(T![static])
+                && p.nth(1) == T![async]
+                && p.nth(2) == T![move]
+                && p.nth(3) == T![|])
     );
     let m = p.start();
+    p.eat(T![static]);
     p.eat(T![async]);
     p.eat(T![move]);
     params::param_list_closure(p);
@@ -272,7 +287,7 @@ fn if_expr(p: &mut Parser) -> CompletedMarker {
     assert!(p.at(T![if]));
     let m = p.start();
     p.bump(T![if]);
-    condition(p);
+    expr_no_struct(p);
     block_expr(p);
     if p.at(T![else]) {
         p.bump(T![else]);
@@ -321,7 +336,7 @@ fn while_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
     assert!(p.at(T![while]));
     let m = m.unwrap_or_else(|| p.start());
     p.bump(T![while]);
-    condition(p);
+    expr_no_struct(p);
     block_expr(p);
     m.complete(p, WHILE_EXPR)
 }
@@ -341,22 +356,18 @@ fn for_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
     m.complete(p, FOR_EXPR)
 }
 
-// test cond
-// fn foo() { if let Some(_) = None {} }
-// fn bar() {
-//     if let Some(_) | Some(_) = None {}
-//     if let | Some(_) = None {}
-//     while let Some(_) | Some(_) = None {}
-//     while let | Some(_) = None {}
+// test let_expr
+// fn foo() {
+//     if let Some(_) = None && true {}
+//     while 1 == 5 && (let None = None) {}
 // }
-fn condition(p: &mut Parser) {
+fn let_expr(p: &mut Parser) -> CompletedMarker {
     let m = p.start();
-    if p.eat(T![let]) {
-        patterns::pattern_top(p);
-        p.expect(T![=]);
-    }
-    expr_no_struct(p);
-    m.complete(p, CONDITION);
+    p.bump(T![let]);
+    patterns::pattern_top(p);
+    p.expect(T![=]);
+    expr_let(p);
+    m.complete(p, LET_EXPR)
 }
 
 // test match_expr
@@ -374,7 +385,7 @@ fn match_expr(p: &mut Parser) -> CompletedMarker {
     if p.at(T!['{']) {
         match_arm_list(p);
     } else {
-        p.error("expected `{`")
+        p.error("expected `{`");
     }
     m.complete(p, MATCH_EXPR)
 }
@@ -468,10 +479,6 @@ fn match_guard(p: &mut Parser) -> CompletedMarker {
     assert!(p.at(T![if]));
     let m = p.start();
     p.bump(T![if]);
-    if p.eat(T![let]) {
-        patterns::pattern_top(p);
-        p.expect(T![=]);
-    }
     expr(p);
     m.complete(p, MATCH_GUARD)
 }
@@ -602,7 +609,7 @@ fn try_block_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
     if p.at(T!['{']) {
         stmt_list(p);
     } else {
-        p.error("expected a block")
+        p.error("expected a block");
     }
     m.complete(p, BLOCK_EXPR)
 }
@@ -622,27 +629,3 @@ fn box_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
     }
     m.complete(p, BOX_EXPR)
 }
-
-/// Expression from `$var` macro expansion, wrapped in dollars
-fn meta_var_expr(p: &mut Parser) -> CompletedMarker {
-    assert!(p.at(L_DOLLAR));
-    let m = p.start();
-    p.bump(L_DOLLAR);
-    let expr = expr_bp(p, None, Restrictions { forbid_structs: false, prefer_stmt: false }, 1);
-
-    match (expr, p.current()) {
-        (Some((cm, _)), R_DOLLAR) => {
-            p.bump(R_DOLLAR);
-            // FIXME: this leaves the dollar hanging in the air...
-            m.abandon(p);
-            cm
-        }
-        _ => {
-            while !p.at(R_DOLLAR) {
-                p.bump_any()
-            }
-            p.bump(R_DOLLAR);
-            m.complete(p, ERROR)
-        }
-    }
-}