[vala/staging] parser: Handle incomplete expression statements

[Rico Tzschichholz <ricotz src gnome org>]

commit 4368a4fa667148378dcdbd251a4ae4e00c9a8e5a
Author: Princeton Ferro <princetonferro gmail com>
Date:   Thu Apr 9 21:15:45 2020 +0200

    parser: Handle incomplete expression statements
    
    Incomplete expression statements are parsed as expression statements
    now, rather than local variable declarations. This primarily affects
    incomplete member access expressions at the end of blocks.

 vala/valaparser.vala | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)
---
diff --git a/vala/valaparser.vala b/vala/valaparser.vala
index 48818a293..e61372975 100644
--- a/vala/valaparser.vala
+++ b/vala/valaparser.vala
@@ -1665,7 +1665,19 @@ public class Vala.Parser : CodeVisitor {
                var begin = get_location ();
 
                // decide between declaration and expression statement
-               skip_type ();
+               try {
+                       skip_type ();
+               } catch (ParseError e) {
+                       prev ();
+                       var token = current ();
+                       next ();
+                       if (token == TokenType.DOT || token == TokenType.DOUBLE_COLON) {
+                               rollback (begin);
+                               return true;
+                       } else {
+                               throw e;
+                       }
+               }
                switch (current ()) {
                // invocation expression
                case TokenType.OPEN_PARENS: