[vala/806-scanner-allow-single-quoted-strings-literals] vala: scanner allows single quoted string literals

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 3a12789bc36855f1af195ffffcb350ef55b15997
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Jun 13 18:12:59 2019 -0500

    vala: scanner allows single quoted string literals

 vala/valascanner.vala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/vala/valascanner.vala b/vala/valascanner.vala
index 718b65471..cc9ff5faa 100644
--- a/vala/valascanner.vala
+++ b/vala/valascanner.vala
@@ -28,6 +28,7 @@ using GLib;
  */
 public class Vala.Scanner {
        public SourceFile source_file { get; private set; }
+       public bool enable_single_quote_string_literal { get; set; }
 
        TokenType previous;
        char* current;
@@ -67,6 +68,7 @@ public class Vala.Scanner {
 
                line = 1;
                column = 1;
+               enable_single_quote_string_literal = false;
        }
 
        public void seek (SourceLocation location) {
@@ -1207,7 +1209,7 @@ public class Vala.Scanner {
                                                        Report.error (get_source_reference 
(token_length_in_chars), "invalid UTF-8 character");
                                                }
                                        }
-                                       if (current < end && begin[0] == '\'' && current[0] != '\'') {
+                                       if (!enable_single_quote_string_literal && current < end && begin[0] 
== '\'' && current[0] != '\'') {
                                                // multiple characters in single character literal
                                                Report.error (get_source_reference (token_length_in_chars), 
"invalid character literal");
                                        }