[vala/0.40] parser: Handle incomplete expression statements

[Rico Tzschichholz <ricotz src gnome org>]

commit 5421541ab6ac6cabf9ca02b586f7235df5a42c99
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 26e9c6625..91594e3bd 100644
--- a/vala/valaparser.vala
+++ b/vala/valaparser.vala
@@ -1640,7 +1640,19 @@ 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: