From 281c9eeaff8eac4e666089f80f67cf684e1d001b Mon Sep 17 00:00:00 2001
From: Andrey Tkachenko <andreytkachenko64@gmail.com>
Date: Thu, 6 Jun 2019 15:36:16 +0400
Subject: [#1083] Try block syntax

---
 crates/ra_parser/src/grammar/expressions/atom.rs | 18 +++++++++++++++++-
 crates/ra_parser/src/syntax_kind/generated.rs    |  7 +++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

(limited to 'crates/ra_parser')

diff --git a/crates/ra_parser/src/grammar/expressions/atom.rs b/crates/ra_parser/src/grammar/expressions/atom.rs
index 8b1a1de49..0df47d33d 100644
--- a/crates/ra_parser/src/grammar/expressions/atom.rs
+++ b/crates/ra_parser/src/grammar/expressions/atom.rs
@@ -52,6 +52,7 @@ pub(super) const ATOM_EXPR_FIRST: TokenSet =
         CONTINUE_KW,
         LIFETIME,
         ASYNC_KW,
+        TRY_KW,
     ]);
 
 const EXPR_RECOVERY_SET: TokenSet = token_set![LET_KW];
@@ -75,6 +76,7 @@ pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMar
         T![loop] => loop_expr(p, None),
         T![for] => for_expr(p, None),
         T![while] => while_expr(p, None),
+        T![try] => try_expr(p, None),
         LIFETIME if la == T![:] => {
             let m = p.start();
             label(p);
@@ -116,7 +118,7 @@ pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMar
         }
     };
     let blocklike = match done.kind() {
-        IF_EXPR | WHILE_EXPR | FOR_EXPR | LOOP_EXPR | MATCH_EXPR | BLOCK_EXPR => BlockLike::Block,
+        IF_EXPR | WHILE_EXPR | FOR_EXPR | LOOP_EXPR | MATCH_EXPR | BLOCK_EXPR | TRY_BLOCK_EXPR => BlockLike::Block,
         _ => BlockLike::NotBlock,
     };
     Some((done, blocklike))
@@ -491,3 +493,17 @@ fn break_expr(p: &mut Parser, r: Restrictions) -> CompletedMarker {
     }
     m.complete(p, BREAK_EXPR)
 }
+
+// test try_expr
+// fn foo() {
+//     try {
+//     
+//     }
+// }
+fn try_expr(p: &mut Parser, m: Option<Marker>) -> CompletedMarker {
+    assert!(p.at(T![try]));
+    let m = m.unwrap_or_else(|| p.start());
+    p.bump();
+    block(p);
+    m.complete(p, TRY_EXPR)
+}
diff --git a/crates/ra_parser/src/syntax_kind/generated.rs b/crates/ra_parser/src/syntax_kind/generated.rs
index d7926bd91..2c021f3e9 100644
--- a/crates/ra_parser/src/syntax_kind/generated.rs
+++ b/crates/ra_parser/src/syntax_kind/generated.rs
@@ -103,6 +103,7 @@ pub enum SyntaxKind {
     LET_KW,
     MOVE_KW,
     RETURN_KW,
+    TRY_KW,
     AUTO_KW,
     DEFAULT_KW,
     UNION_KW,
@@ -184,6 +185,7 @@ pub enum SyntaxKind {
     STRUCT_LIT,
     NAMED_FIELD_LIST,
     NAMED_FIELD,
+    TRY_BLOCK_EXPR,
     CALL_EXPR,
     INDEX_EXPR,
     METHOD_CALL_EXPR,
@@ -331,6 +333,7 @@ macro_rules! T {
     (let) => { $crate::SyntaxKind::LET_KW };
     (move) => { $crate::SyntaxKind::MOVE_KW };
     (return) => { $crate::SyntaxKind::RETURN_KW };
+    (try) => { $crate::SyntaxKind::TRY_KW };
     (auto) => { $crate::SyntaxKind::AUTO_KW };
     (default) => { $crate::SyntaxKind::DEFAULT_KW };
     (union) => { $crate::SyntaxKind::UNION_KW };
@@ -388,6 +391,7 @@ impl SyntaxKind {
             | LET_KW
             | MOVE_KW
             | RETURN_KW
+            | TRY_KW
             | AUTO_KW
             | DEFAULT_KW
             | UNION_KW
@@ -559,6 +563,7 @@ impl SyntaxKind {
             LET_KW => &SyntaxInfo { name: "LET_KW" },
             MOVE_KW => &SyntaxInfo { name: "MOVE_KW" },
             RETURN_KW => &SyntaxInfo { name: "RETURN_KW" },
+            TRY_KW => &SyntaxInfo { name: "TRY_KW" },
             AUTO_KW => &SyntaxInfo { name: "AUTO_KW" },
             DEFAULT_KW => &SyntaxInfo { name: "DEFAULT_KW" },
             UNION_KW => &SyntaxInfo { name: "UNION_KW" },
@@ -640,6 +645,7 @@ impl SyntaxKind {
             STRUCT_LIT => &SyntaxInfo { name: "STRUCT_LIT" },
             NAMED_FIELD_LIST => &SyntaxInfo { name: "NAMED_FIELD_LIST" },
             NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },
+            TRY_BLOCK_EXPR => &SyntaxInfo { name: "TRY_BLOCK_EXPR" },
             CALL_EXPR => &SyntaxInfo { name: "CALL_EXPR" },
             INDEX_EXPR => &SyntaxInfo { name: "INDEX_EXPR" },
             METHOD_CALL_EXPR => &SyntaxInfo { name: "METHOD_CALL_EXPR" },
@@ -734,6 +740,7 @@ impl SyntaxKind {
             "let" => LET_KW,
             "move" => MOVE_KW,
             "return" => RETURN_KW,
+            "try" => TRY_KW,
             _ => return None,
         };
         Some(kw)
-- 
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