Bug 23199 - Mono C# parser fails to handle Boolean expressions using an operator true which takes nullable value types
Summary: Mono C# parser fails to handle Boolean expressions using an operator true whi...
Status: RESOLVED FIXED
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Marek Safar
URL:
Depends on:
Blocks:
 
Reported: 2014-09-19 14:45 UTC by emoriarty
Modified: 2014-09-26 14:34 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description emoriarty 2014-09-19 14:45:05 UTC
The Mono C# parser fails to handle Boolean expressions using an operator true which takes nullable value types

===== Test.cs =====
     1  struct N
     2  {
     3      public static bool operator true(N? n) { return true; }
     4      public static bool operator false(N? n) { return true; }
     5  }
     6  class P
     7  {
     8      static void Main()
     9      {
    10          if (new N?()) {}
    11      }
    12  }
===== End of Test.cs =====

------------------------
Mono Command Line
------------------------
> mcs --version
Mono C# compiler version 3.8.0.0
> mcs /t:library Test.cs
Test.cs(10,17): error CS0029: Cannot implicitly convert type `N?' to `bool'
Compilation failed: 1 error(s), 0 warnings

---------------------------------------------------
Csc Command Line (Visual Studio 2013 command line)
---------------------------------------------------
> csc /t:library Test.cs
Microsoft (R) Visual C# Compiler version 4.0.30319.18408
for Microsoft (R) .NET Framework 4.5
Copyright (C) Microsoft Corporation. All rights reserved.



Edward Moriarty | Junior Engineer
Coverity | The Leader in Development Testing
Comment 1 Marek Safar 2014-09-26 14:34:17 UTC
Fixed in master